Bsc6900 gsm-site-maintenance-guide

BSC6900 GSMV900R012C01

Site Maintenance Guide

Issue 05

Date 2011-05-19

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2011. All rights reserved.No part of this document may be reproduced or transmitted in any form or by any means without prior writtenconsent of Huawei Technologies Co., Ltd. Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.All other trademarks and trade names mentioned in this document are the property of their respective holders. NoticeThe purchased products, services and features are stipulated by the contract made between Huawei and thecustomer. All or part of the products, services and features described in this document may not be within thepurchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,and recommendations in this document are provided "AS IS" without warranties, guarantees or representationsof any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but all statements, information, andrecommendations in this document do not constitute the warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.Address: Huawei Industrial Base

Bantian, LonggangShenzhen 518129People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

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http://www.huawei.com

mailto:[email protected]

About This Document

PurposeThis document describes how to perform the hardware maintenance tasks after the BSC6900commissioning, to maintain the hardware operation of the BSC6900. The maintenance tasksinvolve powering on/off the BSC6900 cabinet, replacing components, and routine maintenancetasks such as checking LEDs and monitoring the site environment.

VersionThe following table lists the product version related to the document.

Product Name Version

BSC6900 V900R012C01

Intended AudienceThis document is intended for:

l Network planning engineersl System engineersl Field engineers

Organization1 Changes in the BSC6900 GSM Site Maintenance Guide

This chapter describes the changes in the BSC6900 GSM Site Maintenance Guide.

2 Site Maintenance Preparations

This chapter describes the preparations for the BSC6900 site maintenance, including the tooland spare part preparations.

3 Routine Hardware Maintenance Items

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This chapter describes the routine hardware maintenance items of the BSC6900. Different itemsrequire different maintenance methods.

4 Powering On/Off the BSC6900

This chapter describes how to power on and power off the BSC6900. The following is described:the distribution of the power switches, powering on the BSC6900 cabinet, powering off theBSC6900 cabinet in a normal situation, and powering off the BSC6900 cabinet in case ofemergencies.

5 Cleaning the Fan Box

This chapter describes how to clean a fan box. To ensure stability and reliability of the equipment,the maintenance personnel should clean each fan box (including the fan boxes in the servicesubracks and the fan boxes in the independent fan subrack) regularly, preferably once everyyear.

6 Cleaning and Replacing the Air Filters

This chapter describes how to clean and replace an air filter. The air filter protects the boardsand the BSC6900 from dust. If an air filter is damaged, you must replace it with a new one intime.

7 Replacing Boards and Modules

This chapter describes how to replace boards and modules in the BSC6900 cabinet, whichinvolves replacing the boards and modules, acknowledging a successful replacement, andhandling of the faulty boards. Each section provides an estimated time for the replacement ofthe board as a reference.

8 Replacing the Cables

This chapter describes how to replace the Ethernet cable, E1/T1 cable, optical cable, clock signalcable, cable to the alarm box, and power distribution box monitoring cable. This chapter alsodescribes how to check that the cables are successfully replaced and how to handle the faultycables.

9 LEDs on the Boards

This chapter describes the LEDs on the BSC6900 boards.

10 DIP Switches on Components

This chapter describes the DIP switches on the boards and subracks of the BSC6900.

11 BSC6900 Site Maintenance Record

This chapter describes the BSC6900 site maintenance record.

ConventionsSymbol Conventions

The symbols that may be found in this document are defined as follows.

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Symbol Description

Indicates a hazard with a high level of risk, which if notavoided, will result in death or serious injury.

Indicates a hazard with a medium or low level of risk, whichif not avoided, could result in minor or moderate injury.

Indicates a potentially hazardous situation, which if notavoided, could result in equipment damage, data loss,performance degradation, or unexpected results.

Indicates a tip that may help you solve a problem or savetime.

Provides additional information to emphasize or supplementimportant points of the main text.

General Conventions

The general conventions that may be found in this document are defined as follows.

Convention Description

Times New Roman Normal paragraphs are in Times New Roman.

Boldface Names of files, directories, folders, and users are inboldface. For example, log in as user root.

Italic Book titles are in italics.

Courier New Examples of information displayed on the screen are inCourier New.

Command Conventions

The command conventions that may be found in this document are defined as follows.


Boldface The keywords of a command line are in boldface.

Italic Command arguments are in italics.

[ ] Items (keywords or arguments) in brackets [ ] are optional.

{ x | y | ... } Optional items are grouped in braces and separated byvertical bars. One item is selected.

[ x | y | ... ] Optional items are grouped in brackets and separated byvertical bars. One item is selected or no item is selected.

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{ x | y | ... }* Optional items are grouped in braces and separated byvertical bars. A minimum of one item or a maximum of allitems can be selected.

[ x | y | ... ]* Optional items are grouped in brackets and separated byvertical bars. Several items or no item can be selected.

GUI Conventions

The GUI conventions that may be found in this document are defined as follows.


Boldface Buttons, menus, parameters, tabs, window, and dialog titlesare in boldface. For example, click OK.

> Multi-level menus are in boldface and separated by the ">"signs. For example, choose File > Create > Folder.

Keyboard Operations

The keyboard operations that may be found in this document are defined as follows.

Format Description

Key Press the key. For example, press Enter and press Tab.

Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt+A means the three keys should be pressed concurrently.

Key 1, Key 2 Press the keys in turn. For example, pressing Alt, A meansthe two keys should be pressed in turn.

Mouse Operations

The mouse operations that may be found in this document are defined as follows.

Action Description

Click Select and release the primary mouse button without movingthe pointer.

Double-click Press the primary mouse button twice continuously andquickly without moving the pointer.

Drag Press and hold the primary mouse button and move thepointer to a certain position.

About This DocumentBSC6900 GSM


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Contents

About This Document...................................................................................................................iii

1 Changes in the BSC6900 GSM Site Maintenance Guide...................................................1-1

2 Site Maintenance Preparations................................................................................................2-12.1 Site Maintenance Tool Preparations...............................................................................................................2-22.2 Spare Part Preparations...................................................................................................................................2-2

3 Routine Hardware Maintenance Items..................................................................................3-13.1 Equipment Room Maintenance Items.............................................................................................................3-23.2 Maintaining the Power Supply and Grounding Systems................................................................................3-23.3 Cabinet Maintenance Items.............................................................................................................................3-43.4 Cable Maintenance Items................................................................................................................................3-5

4 Powering On/Off the BSC6900................................................................................................4-14.1 Distribution of Power Switches on the Common Power Distribution Box.....................................................4-24.2 Distribution of Power Switches on the High-Power PDB..............................................................................4-44.3 Powering On the Cabinet................................................................................................................................4-54.4 Powering Off the Cabinet in a Normal Situation............................................................................................4-84.5 Powering Off the Cabinet in Emergency Cases..............................................................................................4-9

5 Cleaning the Fan Box.................................................................................................................5-1

6 Cleaning and Replacing the Air Filters.................................................................................6-16.1 Position of the Air Filters................................................................................................................................6-26.2 Cleaning the Air Filter at the Bottom of the N68E-22 Cabinet......................................................................6-36.3 Cleaning the Air Filter on the Inner Side of the Cabinet Door.......................................................................6-56.4 Replacing the Air Filters.................................................................................................................................6-6

7 Replacing Boards and Modules...............................................................................................7-17.1 Strategy on Replacing Legacy Components in an Upgrade Scenario.............................................................7-47.2 Procedure for Replacing a Board....................................................................................................................7-4

7.2.1 Removing a Board..................................................................................................................................7-57.2.2 Inserting a Board....................................................................................................................................7-8

7.3 Replacing a DPUa/DPUc/DPUd/DPUf Board..............................................................................................7-107.4 Replacing an EIUa Board..............................................................................................................................7-137.5 Replacing an FG2a Board.............................................................................................................................7-16

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7.6 Replacing an FG2c Board.............................................................................................................................7-197.7 Replacing a GCUa/GCGa Board...................................................................................................................7-237.8 Replacing a GOUa Board..............................................................................................................................7-257.9 Replacing a GOUc Board..............................................................................................................................7-297.10 Replacing an MDMC Board.......................................................................................................................7-327.11 Replacing an OIUa Board...........................................................................................................................7-347.12 Replacing an OMU Board...........................................................................................................................7-37

7.12.1 Checking the OMU Information .......................................................................................................7-407.12.2 Backing Up System Files...................................................................................................................7-427.12.3 Replacing the OMU Board.................................................................................................................7-437.12.4 Installing the Operating System and Loading the OMU Applications..............................................7-477.12.5 Verifying OMU Board Replacement ................................................................................................7-49

7.13 Replacing an SCUa Board...........................................................................................................................7-507.14 Replacing a TNUa Board............................................................................................................................7-537.15 Replacing an XPUa Board..........................................................................................................................7-567.16 Replacing an XPUb Board..........................................................................................................................7-597.17 Replacing a WOPB Board...........................................................................................................................7-627.18 Replacing a Subrack....................................................................................................................................7-647.19 Replacing the Independent Fan Subrack.....................................................................................................7-667.20 Replacing the Power Distribution Box........................................................................................................7-677.21 Replacing the Fan Box................................................................................................................................7-737.22 Replacing the Pluggable Optical Module....................................................................................................7-787.23 Replacing an Optical Splitter/Combiner.....................................................................................................7-807.24 Replacing the KVM....................................................................................................................................7-827.25 Replacing the LAN Switch.........................................................................................................................7-847.26 Replacing the GBAM..................................................................................................................................7-85

8 Replacing the Cables.................................................................................................................8-18.1 Replacing a Power Cable................................................................................................................................8-38.2 Replacing an E1/T1 Cable...............................................................................................................................8-58.3 Replacing an Optical Cable.............................................................................................................................8-78.4 Replacing an Ethernet Cable...........................................................................................................................8-98.5 Replacing a Clock Signal Cable....................................................................................................................8-118.6 Replacing a Y-Shaped Clock Cable..............................................................................................................8-138.7 Replacing an Inter-TNUa Cable....................................................................................................................8-148.8 Replacing an EMU RS485 Communication Cable.......................................................................................8-168.9 Replacing a Signal Cable to the Alarm Box.................................................................................................8-178.10 Replacing the Monitoring Signal Cable for the Power Distribution Box...................................................8-188.11 Replacing the Monitoring Signal Cable for the Independent Fan Subrack.................................................8-20

9 LEDs on the Boards....................................................................................................................9-19.1 LEDs on the DPUa Board...............................................................................................................................9-39.2 LEDs on the DPUc Board...............................................................................................................................9-39.3 LEDs on the DPUd Board...............................................................................................................................9-4

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9.4 LEDs on the EIUa Board................................................................................................................................ 9-49.5 LEDs on the FG2a Board................................................................................................................................9-59.6 LEDs on the FG2c Board................................................................................................................................9-69.7 LEDs on the GCUa Board...............................................................................................................................9-79.8 LEDs on the GOUa Board.............................................................................................................................. 9-79.9 LEDs on the GOUc Board.............................................................................................................................. 9-89.10 LEDs on the MDMC Board..........................................................................................................................9-99.11 LEDs on the OIUa Board..............................................................................................................................9-99.12 LEDs on the OMUa/OMUb Board.............................................................................................................9-109.13 LEDs on the PAMU Board.........................................................................................................................9-119.14 LEDs on the PEUa Board............................................................................................................................9-119.15 LEDs on the POUc Board...........................................................................................................................9-129.16 LEDs on the SCUa Board...........................................................................................................................9-139.17 LEDs on the TNUa Board...........................................................................................................................9-139.18 LEDs on the XPUa Board...........................................................................................................................9-149.19 LEDs on the XPUb Board...........................................................................................................................9-15

10 DIP Switches on Components.............................................................................................10-110.1 DIP Switch on the Subrack.........................................................................................................................10-210.2 DIP Switches on the EIUa Board................................................................................................................10-410.3 DIP Switch on the MDMC Board...............................................................................................................10-610.4 DIP Switch on the PAMU Board................................................................................................................10-710.5 DIP Switches on the PEUa Board...............................................................................................................10-710.6 DIP Switch on the PFCU Board................................................................................................................10-1010.7 Pins on the PFCB Board............................................................................................................................10-12

11 BSC6900 Site Maintenance Record.....................................................................................11-1

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Figures

Figure 4-1 Mapping between the power switches and the components in the MPR (configured with OMU board)/EPR/TCR...............................................................................................................................................................4-2Figure 4-2 Mapping between the power switches and the components in the MPR (configured with GBAM)...............................................................................................................................................................................4-3Figure 4-3 Distribution of power switches on the power distribution box of the MPR/EPR/TCR..................... 4-4Figure 6-1 Air filters in the single-door N68E-22 cabinet...................................................................................6-2Figure 6-2 Air filters in the double-door N68E-22 cabinet..................................................................................6-3Figure 6-3 Removing the air filter from the bottom of the cabinet......................................................................6-4Figure 6-4 Installing the air filter at the bottom of the cabinet............................................................................ 6-5Figure 7-1 Removing a board(configuring the new ejector levers)..................................................................... 7-6Figure 7-2 Removing a board(configuring the old ejector levers).......................................................................7-7Figure 7-3 Installing a BSC6900 board(configuring the new ejector levers)...................................................... 7-9Figure 7-4 Installing a BSC6900 board(configuring the old ejector levers)......................................................7-10Figure 7-5 Settings of DIP switch S2 on the MDMC board..............................................................................7-33Figure 7-6 Procedure for determining an operation...........................................................................................7-38Figure 7-7 Procedures for replacing an OMU board..........................................................................................7-39Figure 7-8 Removing an OMU board that is configured with new ejector levers.............................................7-44Figure 7-9 Installing an OMU board that is configured with new ejector levers...............................................7-45Figure 7-10 Removing an OMU board that is configured with old ejector levers.............................................7-46Figure 7-11 Installing an OMU board that is configured with old ejector levers..............................................7-47Figure 7-12 Replacing a WOPB board...............................................................................................................7-63Figure 7-13 Rear panel of the common power distribution box........................................................................7-68Figure 7-14 Rear panel of the high-power distribution box...............................................................................7-69Figure 7-15 DIP switch on the PFCU................................................................................................................7-74Figure 7-16 DIP switch on the PFCU................................................................................................................7-75Figure 7-17 Jumper pins on the PFCB...............................................................................................................7-75Figure 7-18 Jumper pins on the PFCB...............................................................................................................7-76Figure 7-19 Removing the fan box.....................................................................................................................7-77Figure 7-20 Replacing an optical module..........................................................................................................7-79Figure 7-21 Distribution of the power switches in the MPR.............................................................................7-83Figure 7-22 Front panel of the power distribution box......................................................................................7-87Figure 10-1 Cover plate for the DIP switch on the subrack...............................................................................10-2Figure 10-2 Layout of the DIP switches on the EIUa board..............................................................................10-4Figure 10-3 DIP switch on the MDMC board....................................................................................................10-6

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Figure 10-4 Layout of the DIP switch on the PAMU board..............................................................................10-7Figure 10-5 Layout of the DIP switches on the PEUa board.............................................................................10-8Figure 10-6 DIP switch on the PFCU board....................................................................................................10-11Figure 10-7 DIP switch on the PFCU board....................................................................................................10-11Figure 10-8 Pins on the PFCB board................................................................................................................10-12Figure 10-9 Pins on the PFCB board................................................................................................................10-13

FiguresBSC6900 GSM


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Tables

Table 2-1 Maintenance items and tools for site maintenance...............................................................................2-2Table 2-2 Recommended BSC6900 spare parts...................................................................................................2-3Table 3-1 Maintenance items of the equipment room..........................................................................................3-2Table 3-2 Maintenance items of the power supply and grounding systems.........................................................3-3Table 3-3 BSC6900 cabinet maintenance items...................................................................................................3-4Table 3-4 Cable maintenance items......................................................................................................................3-5Table 4-1 Mapping between the power switches and the components in the MPR (configured with OMU board)/EPR/TCR...............................................................................................................................................................4-2Table 4-2 Mapping between the power switches and the components in the MPR (configured with GBAM)...............................................................................................................................................................................4-3Table 4-3 Mapping between the power switches and the components in the MPR/EPR/TCR............................4-4Table 4-4 Checklist for the power supply to the cabinet components..................................................................4-6Table 4-5 Handling power failures in the components in the cabinet..................................................................4-6Table 7-1 Strategy on replacing faulty legacy components of the BSC6900.......................................................7-4Table 7-2 OMU information table .....................................................................................................................7-41Table 7-3 Checklist for the new power distribution box....................................................................................7-70Table 7-4 Checklist for the new power distribution box....................................................................................7-72Table 7-5 Setting of the DIP switch on the PFCU.............................................................................................7-74Table 7-6 Setting of the DIP switch on the PFCU.............................................................................................7-75Table 7-7 Setting of the jumper pins on the PFCB.............................................................................................7-75Table 7-8 Setting of the jumper pins on the PFCB.............................................................................................7-76Table 7-9 Checklist for replacing the fan box....................................................................................................7-77Table 7-10 Parameters of optical modules.........................................................................................................7-79Table 7-11 Checklist for monitoring optical splitter/combiner replacement......................................................7-81Table 7-12 Checklist for LAN switch replacement............................................................................................7-85Table 7-13 Checklist for GBAM replacement...................................................................................................7-87Table 8-1 Setting switches SW1 to SW6..............................................................................................................8-4Table 8-2 Checklist for power cable replacement................................................................................................8-5Table 8-3 Checklist for E1/T1 cable replacement................................................................................................8-7Table 8-4 Checklist for optical cable replacement...............................................................................................8-9Table 8-5 Checklist for Ethernet cable replacement...........................................................................................8-11Table 8-6 Checklist for clock signal cable replacement.....................................................................................8-12Table 8-7 Checklist for the new Y-shaped clock cable......................................................................................8-14Table 8-8 Checklist for inter-TNUa cable replacement.....................................................................................8-15

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Table 8-9 Checklist for monitoring cable replacement...................................................................................... 8-19Table 8-10 Checklist for monitoring signal cable replacement..........................................................................8-21Table 9-1 LEDs on the DPUa board.....................................................................................................................9-3Table 9-2 LEDs on the DPUc board.....................................................................................................................9-3Table 9-3 LEDs on the DPUd board....................................................................................................................9-4Table 9-4 LEDs on the EIUa board......................................................................................................................9-5Table 9-5 LEDs on the FG2a board......................................................................................................................9-5Table 9-6 LEDs on the FG2c board......................................................................................................................9-6Table 9-7 LEDs on the GCUa board....................................................................................................................9-7Table 9-8 LEDs on the GOUa board....................................................................................................................9-7Table 9-9 LEDs on the GOUc board....................................................................................................................9-8Table 9-10 LEDs on the MDMC board................................................................................................................9-9Table 9-11 LEDs on the OIUa board....................................................................................................................9-9Table 9-12 LEDs on the OMUa/OMUb board...................................................................................................9-10Table 9-13 LEDs on the PAMU board...............................................................................................................9-11Table 9-14 LEDs on the PEUa board.................................................................................................................9-12Table 9-15 LEDs on the POUc board.................................................................................................................9-12Table 9-16 LEDs on the SCUa board.................................................................................................................9-13Table 9-17 LEDs on the TNUa board................................................................................................................ 9-14Table 9-18 LEDs on the XPUa board.................................................................................................................9-14Table 9-19 LEDs on the XPUb board................................................................................................................ 9-15Table 10-1 Description about the bits.................................................................................................................10-3Table 10-2 Setting of the DIP switch................................................................................................................. 10-3Table 10-3 Description of the DIP switches on the EIUa board........................................................................10-5Table 10-4 Description of the different DIP switches........................................................................................10-6Table 10-5 DIP switch on the MDMC board.....................................................................................................10-6Table 10-6 DIP switch on the PAMU board...................................................................................................... 10-7Table 10-7 Description about DIP switches on the PEUa board........................................................................10-9Table 10-8 DIP switch on the PFCU board (in a fan box of the service subrack)...........................................10-11Table 10-9 DIP switch on the PFCU board (in the independent fan subrack).................................................10-12Table 10-10 Pins on the PFCB board (in a fan box of the service subrack)....................................................10-12Table 10-11 Pins on the PFCB board (in the independent fan subrack)..........................................................10-13Table 11-1 BSC6900 site maintenance record...................................................................................................11-1

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1 Changes in the BSC6900 GSM SiteMaintenance Guide

This chapter describes the changes in the BSC6900 GSM Site Maintenance Guide.

05 (2011-05-19)This is the fifth commercial release of V900R012C01.

Compared with issue 04 (2010-11-30), this issue includes the following new topics:

l 7.23 Replacing an Optical Splitter/Combiner

Compared with issue 04 (2010-11-30), this issue incorporates the following changes:

Content Description

8.2 Replacing an E1/T1 Cable The procedure of removing and connecting the fasteningscrews on both ends of the cable is optimized.

8.7 Replacing an Inter-TNUaCable

The procedure of removing and connecting the fasteningscrews on both ends of the cable is optimized.

Compared with issue 04 (2010-11-30), this issue does not exclude any topics.

04 (2010-11-30)This is the fourth commercial release of V900R012C01.

Compared with issue 03 (2010-09-20), this issue does not include any new topics.


Content Description

7 Replacing Boards andModules

The description about the caution is optimized.

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1-1


03 (2010-09-20)

This is the third commercial release of V900R012C01.



Content Description

7.12 Replacing an OMU Board The procedure for this task is optimized.


02 (2010-06-21)

This is the second commercial release of V900R012C01.



Content Description

4.3 Powering On the Cabinet The description about the caution is optimized.


01 (2010-04-10)

This is the first commercial release of V900R012C01.

Compared with issue 03 (2009-12-05) of V900R011C00, this issue includes the following newtopics:

l 7.1 Strategy on Replacing Legacy Components in an Upgrade Scenario

l 7.10 Replacing an MDMC Board

l 7.17 Replacing a WOPB Board

l 7.24 Replacing the KVM

l 7.25 Replacing the LAN Switch

l 7.26 Replacing the GBAM

Compared with issue 03 (2009-12-05) of V900R011C00, this issue incorporates the followingchanges:

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Content Description

7.3 Replacing a DPUa/DPUc/DPUd/DPUf Board

The procedure for replacing the faulty DPUa/DPUf boardis added.

7.20 Replacing the PowerDistribution Box

The procedure for replacing the faulty the common powerdistribution box is added.

Compared with issue 03 (2009-12-05) of V900R011C00, this issue does not exclude any topics.

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2 Site Maintenance Preparations

About This Chapter

This chapter describes the preparations for the BSC6900 site maintenance, including the tooland spare part preparations.

2.1 Site Maintenance Tool PreparationsThis section lists the tools required for BSC6900 site maintenance. These tools must be placedin the equipment room or at nearby places for easy access.

2.2 Spare Part PreparationsThis section describes the spare parts required for BSC6900 site maintenance. These spare partsmust be placed in the equipment room or at nearby places for easy access.

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2.1 Site Maintenance Tool PreparationsThis section lists the tools required for BSC6900 site maintenance. These tools must be placedin the equipment room or at nearby places for easy access.

Table 2-1 lists the maintenance items and tools.

Table 2-1 Maintenance items and tools for site maintenance

Item Tools

Cleaning the fanbox

ESD wrist strap, Phillips screwdriver, vacuum cleaner, ESD soft brush,and clean cotton cloth

Cleaning the airfilters

ESD wrist strap, Phillips screwdriver, and clean cotton cloth

Replacing a board ESD wrist strap, Phillips screwdriver, flat-head screwdriver, ESD boxor bag, clean cotton cloth, and fiber cleaner

Replacing the fanbox, powerdistribution box,or subrack

ESD wrist strap, Phillips screwdriver, flat-head screwdriver, ESD boxor bag, diagonal pliers, dry cotton cloth, and fiber cleaner

Replacing thecables

ESD wrist strap, Ethernet meter, Ethernet cable pliers, flat-headscrewdriver, clean cotton cloth, fiber cleaner, ESD gloves, and diagonalpliers

Tools summary forthe BSC6900 sitemaintenance

ESD gloves, ESD wrist strap, Phillips screwdriver, flat-headscrewdriver, ESD box or bag, dustfree cotton cloth, fiber cleaner,Ethernet cable tester, Ethernet cable pliers, vacuum cleaner, ESD softbrush, and diagonal pliers

2.2 Spare Part PreparationsThis section describes the spare parts required for BSC6900 site maintenance. These spare partsmust be placed in the equipment room or at nearby places for easy access.

Spare Parts Selection Criteria

The principles for preparing the BSC6900 spare parts are as follows:

l When a board that works in independent mode is faulty, the board fault disrupts the servicescarried on the board. Therefore, the priority to prepare a spare board for a board of this typeis high.

l When a board that works in resource pool mode is faulty, the board fault does not disruptthe services, but only deteriorates the performance of the system in certain aspects.Therefore, the priority to prepare a spare board for a board of this type is medium.

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l The filler panel is used for cabinet encapsulation and ventilation. It also ensures theelectromagnetic shielding and neatness of the cabinet. Therefore, the priority to prepare aspare filler panel is medium.

l When a board that works in active/standby mode is faulty, the board fault does not affectthe services because the system automatically switches over the active and standby boards.Therefore, the priority to prepare a spare board for a board of this type is low.

Recommended Spare Parts ListTable 2-2 describes the recommended BSC6900 spare parts.

Table 2-2 Recommended BSC6900 spare parts

Spare Part Quantity

Fan box One for each site

Filler panel Two for each site

Power distributionbox

One for each site

Board One spare SCUa, DPUc, XPUa/XPUb, GCUa/GCGa, OMUa/OMUb,and TNUa board for each siteOne spare DPUa, DPUd, EIUa, OIUa, POUc, PEUa, FG2a/FG2c, andGOUa/GOUc board for each site if these boards are configured

Optical module One spare optical module for each site if the optical module is configured

NOTE

The site operator can also apply for a site-specific quantity of spare parts according to its uniquerequirement.

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3 Routine Hardware Maintenance Items

About This Chapter

This chapter describes the routine hardware maintenance items of the BSC6900. Different itemsrequire different maintenance methods.

3.1 Equipment Room Maintenance ItemsThis section describes the maintenance items in the BSC6900 equipment room. The itemsinclude the ambience alarm, anti-theft device, door and window, temperature, humidity, indoorair conditioner, and dustproof condition.

3.2 Maintaining the Power Supply and Grounding SystemsThis section describes the maintenance items of the BSC6900 power supply and the groundingsystem. The maintenance items consist of power cables, voltage, PGND cables, componentsinside the cabinet, earth resistance, batteries, and rectifier.

3.3 Cabinet Maintenance ItemsThis section describes the maintenance items of the BSC6900 cabinet. The maintenance itemsconsist of fans, air filters, cabinet surface, locks and doors of cabinet, cabinet cleanliness, fanbox cleanliness, ESD wrist strap, cabinet components, and idle optical ports on boards.

3.4 Cable Maintenance ItemsThis section describes the cable maintenance items. The maintenance items consist of cablelabels, connectors and sockets, connection of E1/T1 cables, connection of Ethernet cables, andconnection of optical cables.

BSC6900 GSMSite Maintenance Guide 3 Routine Hardware Maintenance Items


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3.1 Equipment Room Maintenance ItemsThis section describes the maintenance items in the BSC6900 equipment room. The itemsinclude the ambience alarm, anti-theft device, door and window, temperature, humidity, indoorair conditioner, and dustproof condition.

Table 3-1 lists the maintenance items of the equipment room.

Table 3-1 Maintenance items of the equipment room

Item Interval Operation Guide ReferenceStandard

Alarms onequipment roomenvironment

Daily Check whether powersupply alarms, firealarms, or smokealarms are generated.

No power supplyalarms, fire alarms, orsmoke alarms arereported.

Check anti-theft nets,equipment roomdoors, and windows

Weekly Check whether theanti-theft nets, doors,and windows areintact.

The anti-theft device,door, and window arein good condition.

Check roomtemperature

Daily Check thetemperature indicatorin the equipmentroom.

The temperature isbetween 15°C and 30°C.

Check roomhumidity

Daily Check the humidityindicator in theequipment room.

The humidity isbetween 40% and65%.

Check indoor airconditioner

Weekly Check the runningstatus of the airconditioner.

The air conditionerworks properly. Thetemperature set on theair conditioner isconsistent with thaton the thermometer.

Check dustproofcondition

Weekly Check the equipmentshell, equipmentinterior, floor, anddesktop.

The cabinet surface isclean, and the cabinetinterior is dustfree.

3.2 Maintaining the Power Supply and Grounding SystemsThis section describes the maintenance items of the BSC6900 power supply and the groundingsystem. The maintenance items consist of power cables, voltage, PGND cables, componentsinside the cabinet, earth resistance, batteries, and rectifier.

Table 3-2 lists the maintenance items of the power supply and grounding systems.

3 Routine Hardware Maintenance ItemsBSC6900 GSM



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Table 3-2 Maintenance items of the power supply and grounding systems

Item Interval Operation Guide Reference Standard

Power cables Monthly orquarterly

Check all the power cablesbetween the power supplysystem and the powerdistribution box of thecabinet.

l The power cables are notaged.

l The PGND cables aresecurely connected. Theconnection points are notcorroded.

Voltage Monthly orquarterly

Measure the voltage of thepower supply using amultimeter.

The voltage of the powersupply is within the standardvoltage range. For details,refer to TechnicalSpecifications of the Cabinet.

PGND cables Monthly orquarterly

Check all the PGNDcables and groundingbars.

l The PGND cables are notaged.


l The grounding bars arenot corroded. Proper anti-corrosion measures aretaken.

Componentsinside thecabinet

Monthly orquarterly

Check the connectionterminals and captivescrews of all the PGNDcables.

l The PGND cables are notaged.


l The connection terminalsand captive screws aresecurely and correctlyconnected, and they arenot corroded.

Earthresistance

Monthly orquarterly

Use an electric earthresistance tester tomeasure the earthresistance and keep arecord.

The grounding resistance isless than 10 ohms.



3-3


Batteries andrectifier

Yearly Check the batteries andrectifier of the powersupply system in eachequipment room.

l The batteries are normal.There is no batteryleakage, swelling, orcorrosion.

l The capacity of allbatteries meets thestandard requirementsand the batteries arecorrectly connected.

l The rectifier meets therequired specifications.

3.3 Cabinet Maintenance ItemsThis section describes the maintenance items of the BSC6900 cabinet. The maintenance itemsconsist of fans, air filters, cabinet surface, locks and doors of cabinet, cabinet cleanliness, fanbox cleanliness, ESD wrist strap, cabinet components, and idle optical ports on boards.

Table 3-3 lists the maintenance items of the BSC6900 cabinet.

Table 3-3 BSC6900 cabinet maintenance items


Fans Weekly ormonthly

Check the running state ofthe fans.

The fan works properlywithout making abnormalsounds.

Air filters Quarterly Check the air filters ofeach cabinet.

The air filters are dust-freeand damage-free. Clean thedirty air filter according to6 Cleaning and Replacingthe Air Filters. Replacethe damaged air filteraccording to 6.4 Replacingthe Air Filters.

Cabinet surface Monthly orquarterly

Check the cabinet surfaceand the cabinet labels.

The cabinet surface isintact. The labels arelegible.

Locks anddoors

Monthly orquarterly

Check whether the lock isnormal and the door can beopened and closed easily.

The locks and the doors ofthe cabinet work properly.

Cleanness ofthe cabinets

Monthly orquarterly

Check whether the cabinetis clean.

The cabinet surface isclean. The interior of thecabinet is dust-free.




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Cleanness ofthe fan box Yearly

Clean the fan boxaccording to 5 Cleaningthe Fan Box.

The surface of the fan boxis clean. The interior of thefan box is dust-free.

Inside of thecabinet

Monthly orquarterly

Check the LEDs of everycomponent inside thecabinet.

The LEDs work properly.For details on the LEDs,refer to the following part:Front Panel of the High-Power Power DistributionBox, Fan Box (Configuredwith the PFCU Board), FanBox (Configured with thePFCB Board), 9 LEDs onthe Boards.

ESD wrist strap Quarterly

Measure the groundingresistance of the ESD wriststrap as follows:l Use an ESD wrist strap

tester to test the ESDwrist strap.

l Use a multimeter.

l When you use an ESDwrist strap tester, theGOOD LED on it isON.

l When you use amultimeter, thegrounding resistance ofthe ESD wrist strapranges from 0.8megohm to 1.2megohms.

Protection ofthe idle opticalports on boards

Monthly orquarterly

Check the dustproof capson the idle optical ports.

The dustproof caps are onthe idle optical ports.

3.4 Cable Maintenance ItemsThis section describes the cable maintenance items. The maintenance items consist of cablelabels, connectors and sockets, connection of E1/T1 cables, connection of Ethernet cables, andconnection of optical cables.

Table 3-4 describes the cable maintenance items.

Table 3-4 Cable maintenance items


Checkconnectors andsockets

Monthly orquarterly

Check the insulators ofthe connectors or thesockets.

The insulators of theconnectors or the socketsare clean.



3-5


E1/T1 cableconnections Yearly Check the connections

of the E1/T1 cables.

l The E1/T1 cables areproperly connected.

l The E1/T1 cables areintact.

l The labels on the cablesare legible.

Ethernet cableconnections Yearly Check the connections

of the Ethernet cables.

l The Ethernet cables areproperly connected.

l The Ethernet cables areintact.


Optical cableconnections Yearly Check the connections

of the optical cables.

l The optical cables areproperly connected.

l The optical cables areintact.





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4 Powering On/Off the BSC6900

About This Chapter

This chapter describes how to power on and power off the BSC6900. The following is described:the distribution of the power switches, powering on the BSC6900 cabinet, powering off theBSC6900 cabinet in a normal situation, and powering off the BSC6900 cabinet in case ofemergencies.

4.1 Distribution of Power Switches on the Common Power Distribution BoxThis section describes the mapping between the six routes of power outputs from the powerdistribution box of the BSC6900 cabinet and the components in the BSC6900 cabinet.

4.2 Distribution of Power Switches on the High-Power PDBThe power distribution box of the MPR/EPR/TCR provides 20 (10 x 2) routes of power outputs.This section describes the mapping between the eight routes of power outputs from the powerdistribution box of the MPR/EPR/TCR and the components in the cabinet.

4.3 Powering On the CabinetThis section describes how to power on the BSC6900 cabinet and how to handle common powerfailures in the components of the cabinet.

4.4 Powering Off the Cabinet in a Normal SituationThis section describes how to power off the BSC6900 cabinet in a normal situation. You mustpower off the BSC6900 cabinet before relocating the equipment or before a forecasted territorialpower blackout. Powering off the BSC6900 cabinet disrupts all the ongoing services. Therefore,power off the BSC6900 cabinet only when required.

4.5 Powering Off the Cabinet in Emergency CasesThis section describes how to power off the BSC6900 cabinet in emergency cases. To ensurethe security of the BSC6900 cabinet, the BSC6900 cabinet must be powered off in emergencycases, such as fire, smoke, or water immersion.

BSC6900 GSMSite Maintenance Guide 4 Powering On/Off the BSC6900


4-1

4.1 Distribution of Power Switches on the Common PowerDistribution Box

This section describes the mapping between the six routes of power outputs from the powerdistribution box of the BSC6900 cabinet and the components in the BSC6900 cabinet.

Distribution of Power Switches on the Power Distribution Box of the MPR(Configured with OMU Board)/EPR/TCR

When the MPR is configured with the OMU board, the distribution of power switches on thepower distribution box of the MPR is the same as the distribution of power switches on the powerdistribution box of the EPR/TCR. Figure 4-1 shows the mapping between the six power switcheson the power distribution box and the components in the MPR (configured with OMU board)/EPR/TCR. Table 4-1 presents the mapping between the six power switches and the componentsin the MPR (configured with OMU board)/EPR/TCR.

Figure 4-1 Mapping between the power switches and the components in the MPR (configuredwith OMU board)/EPR/TCR

Table 4-1 Mapping between the power switches and the components in the MPR (configuredwith OMU board)/EPR/TCR

Component Power Switch on the Power Distribution Box

Subrack 2 SW1, SW4

Subrack 1 SW2, SW5

4 Powering On/Off the BSC6900BSC6900 GSM



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Subrack 0 SW3, SW6

Distribution of Power Switches on the Power Distribution Box of the MPR(Configured with GBAM)

Figure 4-2 shows the mapping between the six power switches on the power distribution boxand the components in the MPR that is configured with GBAM. Table 4-2 presents the mappingbetween the six power switches on the power distribution box and the components in the MPRthat is configured with GBAM.

Figure 4-2 Mapping between the power switches and the components in the MPR (configuredwith GBAM)

Table 4-2 Mapping between the power switches and the components in the MPR (configuredwith GBAM)


Subrack 1 SW1, SW4

Subrack 0 SW2, SW5

KVM SW3

LAN switch SW3



4-3


GBAM SW3, SW6

4.2 Distribution of Power Switches on the High-Power PDBThe power distribution box of the MPR/EPR/TCR provides 20 (10 x 2) routes of power outputs.This section describes the mapping between the eight routes of power outputs from the powerdistribution box of the MPR/EPR/TCR and the components in the cabinet.

The power distribution box of the MPR/EPR/TCR provides eight routes of power outputs in twogroups (group A and group B), which are controlled by switches A7 to A10 and B7 to B10respectively. Figure 4-3 shows the mapping between the power switches on the powerdistribution box and the components in the MPR/EPR/TCR. Table 4-3 lists the mapping betweenthe power switches and the components.

Figure 4-3 Distribution of power switches on the power distribution box of the MPR/EPR/TCR

Table 4-3 Mapping between the power switches and the components in the MPR/EPR/TCR


Subrack 2 A8, B8

Subrack 1 A9, B9

Subrack 0 A10, B10




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Independent fan subrack A7, B7

4.3 Powering On the CabinetThis section describes how to power on the BSC6900 cabinet and how to handle common powerfailures in the components of the cabinet.

Prerequisitel The surface of the input power cables is not damaged. The input power cables are correctly

and securely connected.l The green and yellow PGND cable for the cabinet is properly connected.l The power switches SW1 to SW6 (or A1 to A10 and B1 to B10) on the power distribution

box are set to OFF.

CAUTIONEnsure that the Checking and Setting the Subrack DIP Switch operation is performed before thecabinet is powered on. After the cabinet is powered on, any modification to the setting of a DIPswitch on a subrack does not take effect.

Procedure

Step 1 Set the power switches that control the BSC power supply on the power distribution frame (PDF)to ON.

Step 2 Set the power switches on the power distribution box to ON after the RUN LED on the frontpanel of the power distribution box blinks every alternate 0.25s.

If the cabinet is... Then...

MPR, Set the corresponding power switches on the power distributionbox to ON. Then, go to Step 3.

EPR/TCR, Set the power switches that correspond to the subracksconfigured in the same cabinet to ON. Then, go to Step 4.

Step 3 Set the power switch on the front panel of the GBAM and the power switch on the rear panel ofthe KVM to ON if the GBAM is configured.

Step 4 Check the power supply to the cabinet components, as listed in Table 4-4.



4-5

Table 4-4 Checklist for the power supply to the cabinet components

Component Normal LED Status

Board The green RUN LED on the board panel blinks everyalternate second.

Fan box The green LED on the panel of the fan box blinks everyalternate second after the subrack/independent fansubrack is powered on.

Power distribution monitor board The green RUN LED on the board panel blinks everyalternate second.

GBAM The main power LED on the front panel is on.

LAN switch The POWER LED on the front panel is on.

KVM The POWER LED on the keyboard is on.

Step 5 Power on the cabinet and then check the power supply to the components in the cabinet. Clearthe power failures, if any, according to Table 4-5.

Table 4-5 Handling power failures in the components in the cabinet

Failure Type Handling Measures

Power failure in all the internalparts of the cabinet

Check whether the -48 V power cables and the RTN powercables are properly connected.l If the cable connection is wrong, set all the power

switches on the power distribution box to OFF, and thenreconnect the power cables.CAUTION

Set the power switches that control the BSC power supply onthe PDF to OFF before reconnecting the power cables.

l If the cable connection is correct, replace theOvervoltage Protection Board (WOPB). If the failurepersists, replace the power distribution box.

Power failure in all the boardsin a subrack

Use a multimeter to measure the input voltage of the subrackl If the input voltage is between -40 V and -57 V, replace

the subrack.l If the input voltage is not between -40 V and -57 V, check

the connections of the power cables. If the connectionsof the power cables are loose, set the power switch onthe power distribution box corresponding to the subrackto OFF and then reconnect the power cables. Otherwise,replace the power distribution box because the powerswitch on it may be faulty.




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Failure Type Handling Measures

Power failure in a certain boardin a subrack

Perform the following operations:1. Check whether the board is securely connected. If the

board is not securely connected, reinstall the board.Observe the LEDs on the board panel. For details aboutthe states of the LEDs on the board panel, see 9 LEDson the Boards.

2. Remove the board, and check whether there is anydistorted pin, broken pin, or or if any pin is missing onthe board socket. Replace the subrack if there is adistorted pin, broken pin, or if a pin is missing.

3. Reinstall the board, and observe the LEDs on the boardpanel. For details about the states of the LEDs on theboard panel, see 9 LEDs on the Boards.

4. If the LEDs indicate that the board does not worknormally, remove the board and install it into an idle slotthat is for a board of the same type. Then, observe theLEDs on the board panel.l If the board works normally, it indicates that the slot

is faulty. In this case, replace the subrack.l If the board does not work normally, it indicates that

the board is faulty. In this case, replace the board.

Power failure in the GBAM Use a multimeter to measure the input voltage of the GBAM.l If the input voltage is between -40 V and -57 V, replace

the power modules of the GBAM.l If the input voltage is not between -40 V and -57 V, check

the connections of the power cables. If the connectionsof the power cables are loose, set the power switch onthe power distribution box corresponding to the GBAMto OFF and then reconnect the power cables. Otherwise,replace the power distribution box because the powerswitch on it may be faulty.

Power failure in any other partin the cabinet

Use a multimeter to measure the input voltage of the faultycomponent.l If the input voltage is between -40 V and -57 V, replace

the component.l If the input voltage is not between -40 V and -57 V, check

the connections of the power cables. If the connectionsof the power cables are loose, set the power switch onthe power distribution box corresponding to thecomponent to OFF and then reconnect the power cables.Otherwise, replace the power distribution box becausethe power switch on it may be faulty.

----End



4-7

4.4 Powering Off the Cabinet in a Normal SituationThis section describes how to power off the BSC6900 cabinet in a normal situation. You mustpower off the BSC6900 cabinet before relocating the equipment or before a forecasted territorialpower blackout. Powering off the BSC6900 cabinet disrupts all the ongoing services. Therefore,power off the BSC6900 cabinet only when required.

Prerequisitel The green and yellow PGND cable for the cabinet is properly connected.

l The data on the BSC6900 is backed up. Back up the system data by referring to .

ContextTo minimize the adverse impact on the BSC6900, power off the EPR/TCR before you poweroff the MPR.

Procedurel In the case that the external GBAM is configured

1. Run the Telnet client, such as PuTTY, on the LMT PC. Enter the IP address of theexternal GBAM and then log in to the GBAM as user root.

2. Run the poweroff command to shut down the external GBAM.

3. Set the power switch on the front panel of the external GBAM to OFF.

4. Set power switches SW1 to SW6 on the power distribution box of the EPR/TCR toOFF.

5. If multiple EPR/TCRs are configured, repeat Step 4 to power off all the EPRs/TCRs.

CAUTIONIf only a few EPRs/TCRs are powered off, data inconsistency may occur.

6. Turn off the power switch on the rear panel of the KVM.

7. Set power switches SW1 to SW6 on the power distribution box of the MPR to OFF.

8. Set the power switches that control the BSC6900 power supply on the PDF to OFF.

l In the case that the OMU board is configured

1. Set the power switches corresponding to the subracks configured in the EPR. That is,set the power switches A7 to A10 and B7 to B10 on the power distribution box toOFF in sequence.

2. Flip open the ejector levers of the OMU board.

NOTE

Repeat this step if two OMU boards are configured. After you flip open the upper and lowerejector levers, the OMU board automatically shuts down the operating system and hard disks.The OFFLINE LED on the board is on, which indicates that the board is powered off.




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3. After the OFFLINE LED on the OMU board is ON, set the power switches A7 toA10 and B7 to B10 on the power distribution box to OFF in sequence.

4. Flip the ejector levers of the OMU board inwards until they are in position.5. Set the power switches that control the BSC power supply on the PDF to OFF.

----End

4.5 Powering Off the Cabinet in Emergency CasesThis section describes how to power off the BSC6900 cabinet in emergency cases. To ensurethe security of the BSC6900 cabinet, the BSC6900 cabinet must be powered off in emergencycases, such as fire, smoke, or water immersion.

Procedure

Step 1 Set all the switches on the power distribution box of the BSC6900 cabinet to OFF.

Step 2 If time permits, set the switches that control the power supply to the BSC6900 on the PDF toOFF.

----End



4-9

5 Cleaning the Fan Box

This chapter describes how to clean a fan box. To ensure stability and reliability of the equipment,the maintenance personnel should clean each fan box (including the fan boxes in the servicesubracks and the fan boxes in the independent fan subrack) regularly, preferably once everyyear.

Prerequisitel The tools are ready. They are the ESD wrist strap, clean cotton cloth, ESD soft brush,

vacuum cleaner, and Phillips screwdriver.l A clean backup fan box is ready for use.

Context

CAUTIONl To protect the components from electrostatic discharge, wear an ESD wrist strap properly.

Ensure that the ESD wrist strap is properly connected to the ESD connector on the cabinet.If no ESD wrist strap or no proper grounding point is available, wear ESD gloves.

l Cleaning the fan box severely affects heat dissipation; therefore, you should replace the fanbox in less than one minute. Otherwise, the boards may be damaged due to high temperature.

Procedure

Step 1 Clean the backup fan box by using a clean cotton cloth, an ESD soft brush, and a vacuum cleaner.

Step 2 Use a Phillips screwdriver to open the front door of the cabinet and loosen the two captive screwson the fan box.

Step 3 Remove the fan box from the cabinet.

BSC6900 GSMSite Maintenance Guide 5 Cleaning the Fan Box


5-1

DANGERWhen replacing the fan box, do not put your hand inside the fan box. Otherwise, the revolvingfan blade may injure your fingers.

Step 4 Install the backup fan box into the cabinet and then fasten the captive screws to secure the fanbox.

Step 5 Clean the removed fan box with a clean cotton cloth, an ESD soft brush, and a vacuum cleaner.After being cleaned, the fan box is reserved as a backup for future use.

Step 6 Repeat Step 2 through Step 5 to replace other fan boxes.

----End

5 Cleaning the Fan BoxBSC6900 GSM



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6 Cleaning and Replacing the Air Filters

About This Chapter

This chapter describes how to clean and replace an air filter. The air filter protects the boardsand the BSC6900 from dust. If an air filter is damaged, you must replace it with a new one intime.

6.1 Position of the Air FiltersThis section describes the position of the air filters in the BSC6900 cabinet. The air filters areinstalled on the inner side of the front and back doors and at the bottom of the cabinet.

6.2 Cleaning the Air Filter at the Bottom of the N68E-22 CabinetThis section describes how to clean the air filter at the bottom of the N68E-22 cabinet. Themaintenance personnel should clean the air filter at the bottom of each cabinet regularly,preferably once every quarter.

6.3 Cleaning the Air Filter on the Inner Side of the Cabinet DoorThis section describes how to clean the air filter on the inner side of the cabinet door. Themaintenance personnel should clean the air filters regularly, preferably once every quarter.

6.4 Replacing the Air FiltersThis section describes how to replace a worn-out BSC6900 air filter. It takes about five minutesto replace an air filter.

BSC6900 GSMSite Maintenance Guide 6 Cleaning and Replacing the Air Filters


6-1

6.1 Position of the Air FiltersThis section describes the position of the air filters in the BSC6900 cabinet. The air filters areinstalled on the inner side of the front and back doors and at the bottom of the cabinet.

Figure 6-1 shows the position of the air filters in the single-door N68E-22 cabinet. Figure6-2 shows the position of the air filters in the double-door N68E-22 cabinet.

Figure 6-1 Air filters in the single-door N68E-22 cabinet

6 Cleaning and Replacing the Air FiltersBSC6900 GSM



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Figure 6-2 Air filters in the double-door N68E-22 cabinet

NOTE

The air filter at the bottom of the cabinet is white, and fixed on the rack with screws. The other filters areblack, and fixed on the cabinet with binding strips.

6.2 Cleaning the Air Filter at the Bottom of the N68E-22Cabinet

This section describes how to clean the air filter at the bottom of the N68E-22 cabinet. Themaintenance personnel should clean the air filter at the bottom of each cabinet regularly,preferably once every quarter.



6-3

PrerequisiteThe tools are ready. They are the ESD wrist strap, Phillips screwdriver, and dry cleaning cloth.

Context

CAUTIONTo protect the components from electrostatic discharge, wear an ESD wrist strap properly.Ensure that the ESD wrist strap is properly connected to the ESD connector on the cabinet. Ifno ESD wrist strap or no proper grounding point is available, wear ESD gloves.

ProcedureStep 1 Open the front door of the cabinet and then remove the two screws from the air filter with a

Phillips screwdriver, as shown in Figure 6-3.

Figure 6-3 Removing the air filter from the bottom of the cabinet

Step 2 Hold the panel of the air filter frame with both hands and lift the frame slightly to raise the panelhigher than the screws fixing the grounding cables at the bottom of the cabinet. Then, pull theframe out of the cabinet slowly and completely.

Step 3 Clean the air filter with water and wipe it up with dry cloth. Then, dry the air filter in a ventilatedplace.




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CAUTIONDo not place a wet air filter in the cabinet. The equipment may be damaged due to the shortcircuit when the water is absorbed by the cabinet.

Step 4 Insert the clean air filter carefully along the guide rails into the cabinet. Do not push it forcibly.

Step 5 After the air filter is in position, fix the two screws on the air filter frame with a Phillipsscrewdriver, as shown in Figure 6-4.

Figure 6-4 Installing the air filter at the bottom of the cabinet

----End

6.3 Cleaning the Air Filter on the Inner Side of the CabinetDoor

This section describes how to clean the air filter on the inner side of the cabinet door. Themaintenance personnel should clean the air filters regularly, preferably once every quarter.

Prerequisitel The tools are ready. They are the ESD wrist strap and cotton cloth that is dry and clean.



6-5

Context


Procedure

Step 1 Open the door of the cabinet and strip off the black air filter from the inside of the door.

Step 2 Clean the air filter with water, and then dry the air filter in a ventilated place or by using a waterextractor.

CAUTIONDo not place a wet air filter in the cabinet. The equipment may be damaged due to the shortcircuit when the water is absorbed by the cabinet.

Step 3 Clean the inside metal surface of the door with the clean cotton cloth.

Step 4 Stick the clean air filter along the edges of the inside of the door.

CAUTIONThe air filters must be tightly stuck to the binding strips to avoid falling off. If the binding stripsfail to work, replace them with new ones.

----End

6.4 Replacing the Air FiltersThis section describes how to replace a worn-out BSC6900 air filter. It takes about five minutesto replace an air filter.

Prerequisitel The tools are ready. The tools are the ESD wrist strip and Phillips screwdriver.

l A new air filters for the BSC6900 are ready.




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Context


Procedure

Step 1 Remove the air filter from the cabinet.

If... Then...

The air filter is installed at the bottom ofthe cabinet,

Loosen the retention screws with the Phillipsscrewdriver and then remove the air filter.

The air filter is installed on the inner sideof the front door or the back door,

Remove the air filter.

Step 2 Install the new air filter.

If... Then...

The air filter needs to be installed at thebottom of the N68E-22 cabinet,

Install the air filter in the original position andfasten the screws with the Phillips screwdriver.

The air filter needs to be installed on theinner side of the front door or the backdoor,

Stick the black air filter along the edges of theinner side of the door. Place the black air filteralong the edges of the inner side of the door.Ensure that the edges of the air filter are tightlyattached to the black binding strips to prevent itfrom falling off.

----End

Follow-up ProcedureDispose of the replaced air filter properly to prevent environmental pollution.



6-7

7 Replacing Boards and Modules

About This Chapter

This chapter describes how to replace boards and modules in the BSC6900 cabinet, whichinvolves replacing the boards and modules, acknowledging a successful replacement, andhandling of the faulty boards. Each section provides an estimated time for the replacement ofthe board as a reference.

7.1 Strategy on Replacing Legacy Components in an Upgrade ScenarioThis section describes the legacy components that can be used by the BSC6900 after an upgrade.It also describes the strategy on how to replace the faulty legacy components.

7.2 Procedure for Replacing a BoardThis section describes the procedure for replacing a BSC6900 board.

7.3 Replacing a DPUa/DPUc/DPUd/DPUf BoardThis section describes how to replace a faulty DPUa/DPUc/DPUd/DPUf board. The DPUa/DPUc/DPUd/DPUf board is hot-swappable. It takes about two minutes to replace the board.

7.4 Replacing an EIUa BoardThis section describes how to replace a faulty EIUa board. The EIUa board is hot-swappable. Ittakes about eight minutes to replace an EIUa board.

7.5 Replacing an FG2a BoardThis section describes how to replace a faulty FG2a board. The FG2a board is hot swappable.It takes about five minutes to replace the board.

7.6 Replacing an FG2c BoardThis section describes how to replace a faulty FG2c board. The FG2c board is hot-swappable.It takes about five minutes to replace the board.

7.7 Replacing a GCUa/GCGa BoardThis section describes how to replace a faulty GCUa/GCGa board. The GCUa/GCGa board ishot-swappable. It takes about five minutes to replace the board.

7.8 Replacing a GOUa BoardThis section describes how to replace a faulty GOUa board. The GOUa board is hot-swappable.It takes about five minutes to replace the board.

7.9 Replacing a GOUc Board

BSC6900 GSMSite Maintenance Guide 7 Replacing Boards and Modules


7-1

This section describes how to replace a faulty GOUc board. The GOUc board is hot-swappable.It takes about five minutes to replace the board.

7.10 Replacing an MDMC BoardThis section describes how to replace a faulty MDMC board. The MDMC board is hot-swappable. It takes about ten minutes to replace the board.

7.11 Replacing an OIUa BoardThis section describes how to replace a faulty OIUa board. The OIUa board is hot-swappable.It takes about five minutes to replace the board.

7.12 Replacing an OMU BoardThis section describes how to replace a faulty OMU board. The OMU board is hot-swappable.It takes about 16 minutes to replace an OMU board.

7.13 Replacing an SCUa BoardThis section describes how to replace a faulty SCUa board. The SCUa board is hot-swappable.It takes about four minutes to replace the board.

7.14 Replacing a TNUa BoardThis section describes how to replace a faulty TNUa board. The TNUa board is hot-swappable.It takes about four minutes to replace the board.

7.15 Replacing an XPUa BoardThis section describes how to replace a faulty XPUa board. The XPUa board is hot-swappable.It takes about six minutes to replace and load a board.

7.16 Replacing an XPUb BoardThis section describes how to replace a faulty XPUb board. The XPUb board is hot-swappable.It takes about six minutes to replace and load a board.

7.17 Replacing a WOPB BoardThis section describes how to replace a faulty WOPB board. The WOPB board is hot-swappable.It takes about ten minutes to replace the board.

7.18 Replacing a SubrackThis section describes how to replace a faulty BSC6900 subrack. It takes about 60 minutes toreplace a subrack.

7.19 Replacing the Independent Fan SubrackWhen the independent fan subrack in the BSC6900 is faulty, the independent fan subrack mustbe replaced. It takes about 15 minutes to replace an independent fan subrack.

7.20 Replacing the Power Distribution BoxThis section describes how to replace a faulty power distribution box. It takes about 25 minutesto replace a power distribution box.

7.21 Replacing the Fan BoxWhen a fan box in the service subrack or in the independent fan subrack is faulty, the fan boxmust be replaced. You should finish the replacement of the fan box in less than one minute.

7.22 Replacing the Pluggable Optical ModuleThis section describes how to replace a pluggable optical module when the module is faulty.

7.23 Replacing an Optical Splitter/CombinerThis section describes how to replace an optical splitter/combiner. The BSC6900 opticalsplitters/combiners are LC/LC-LC single-mode optical splitter/combiner and LC/LC-LC multi-mode optical splitter/combiner. It takes about five minutes to replace an optical splitter/combiner.

7 Replacing Boards and ModulesBSC6900 GSM



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7.24 Replacing the KVMThis section describes how to replace a faulty KVM. It takes about 10 minutes to replace a KVM.

7.25 Replacing the LAN SwitchThis section describes how to replace a faulty LAN switch. It takes about 10 minutes to replacea LAN switch.

7.26 Replacing the GBAMThis section describes how to replace a faulty GBAM. It takes about 40 minutes to replace aGBAM. There are three models of GBAM, namely, IBM X3650T, C5210, and HP CC3310.



7-3

7.1 Strategy on Replacing Legacy Components in anUpgrade Scenario

This section describes the legacy components that can be used by the BSC6900 after an upgrade.It also describes the strategy on how to replace the faulty legacy components.

Table 7-1 describes the strategy on how to replace the faulty legacy components of theBSC6900.

Table 7-1 Strategy on replacing faulty legacy components of the BSC6900

Legacy Component With Spare Part Without Spare Part

OMUb board Replace the faulty OMUbboard with the spare OMUbboard. For details, see 7.12Replacing an OMU Board.

Replace the faulty OMUbboard with the spare OMUaboard. For details on how toreplace an OMUb board withan OMUa board, see 7.12Replacing an OMU Board.

DPUa board Replace the faulty DPUaboard with the spare DPUaboard. For details, see 7.3Replacing a DPUa/DPUc/DPUd/DPUf Board.

Replace the faulty DPUaboard with the spare DPUcboard. For details on how toreplace a DPUa board with aDPUc board, see 7.3Replacing a DPUa/DPUc/DPUd/DPUf Board.

GBAM/LAN switch Replace the faulty GBAM/LAN switch with the spareGBAM/LAN switch. Fordetails, see 7.26 Replacingthe GBAM and 7.25Replacing the LAN Switch.

Replace the faulty GBAMwith the spare OMUa board.For details on how to replacethe GBAM with an OMUaboard, see 7.26 Replacingthe GBAM.

Common power distributionbox

Replace the faulty powerdistribution box with thespare power distribution box.For details, see 7.20Replacing the PowerDistribution Box.

Contact Huawei engineers.

7.2 Procedure for Replacing a BoardThis section describes the procedure for replacing a BSC6900 board.

7.2.1 Removing a BoardThis section describes how to remove a BSC6900 board.

7.2.2 Inserting a Board




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This section describes how to insert a BSC6900 board into the subrack.

7.2.1 Removing a BoardThis section describes how to remove a BSC6900 board.

PrerequisiteThe tools are ready, including the ESD wrist strap, Phillips screwdriver, ESD box or bag, dustfreecotton cloth, and fiber cleaner.

ContextAll the boards in the BSC6900 cabinet, except the OMUa board, are hot-swappable. For otherprinciples of removing a board, see Precautions on Board Operation.

CAUTIONl The OMUa board can be hot-swappable only after the operating system is shut down.l To protect the components from electrostatic discharge, wear an ESD wrist strap properly.


Procedurel Removing a board(configuring the new ejector levers)

1. Loosen the fastening screws on the board panel counterclockwise. Ensure that thescrews are fully detached from the subrack, as shown in parts A of Figure 7-1



7-5

Figure 7-1 Removing a board(configuring the new ejector levers)

2. Press and hold the two locking buttons and turn the ejector levers on the board panels,

as shown in part B of Figure 7-1. The board is detached from the backplane, as shownin part C of Figure 7-1.

3. Hold the two ejector levers and pull the board along the guide rails, as shown in partC of Figure 7-1.

CAUTIONPull the board steadily without shaking the board to avoid damaging the pins on thebackplane or the board connector.

4. Pull the board out of the subrack by pulling the upper ejector lever on the front panelwith one hand and holding the bottom of the board by the other.

5. Put the removed board in an ESD case or bag.




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CAUTIONWhile removing a board, do not touch the PCB or any other devices except for jumpersand DIP switches.

l Removing a board(configuring the old ejector levers)1. Loosen the fastening screws on the board panel counterclockwise. Ensure that the

screws are fully detached from the subrack, as shown in parts A of Figure 7-2.

Figure 7-2 Removing a board(configuring the old ejector levers)

2. Press the self-locking spring on the two ejector levers on the board panel, and at the

same time, turn the two ejector levers outwards, as shown in part B of Figure 7-2.The board is detached from the backplane, as shown in part C of Figure 7-2.

3. Hold the two ejector levers and pull the board along the guide rails, as shown in partC of Figure 7-2.

CAUTIONPull the board steadily without shaking the board to avoid damaging the pins on thebackplane or the board connector.

4. Pull the board out of the subrack by pulling the upper ejector lever on the front panelwith one hand and holding the bottom of the board by the other.

5. Put the removed board in an ESD case or bag.



7-7

CAUTIONWhile removing a board, do not touch the PCB or any other devices except for jumpersand DIP switches.

----End

7.2.2 Inserting a BoardThis section describes how to insert a BSC6900 board into the subrack.

Prerequisitel The tools are ready, including the ESD wrist strap, Phillips screwdriver, and ESD box or

bag.l A new board is ready and the DIP switches are correctly set.

Context

CAUTIONl You are required to wear an ESD Wrist Strap and plug the ESD wrist strap into the ESD

connector of the cabinet before inserting a board.l While inserting a board, do not touch the PCB or any other devices except the jumpers and

DIP switches with your bare hands.

For other principles of installing a BSC6900 board, see Precautions on Board Operation.

Procedurel Inserting a Board (configuring the new ejector levers)

1. Take the new board out of the ESD box. Then, check the pins and the sockets of theboard.If there is any missing or broken pin, any bent ping or socket, contact Huawei engineersfor replacement.

2. Press and hold the two locking buttons and turn the ejector levers on the board panels,as shown in parts A of Figure 7-3. Turn the ejector lever into the position, as shownin part B of Figure 7-3.




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Figure 7-3 Installing a BSC6900 board(configuring the new ejector levers)

3. Hold the panel with one hand and the lower edge of the board with the other hand,and then push the board into the subrack along the guide rails until the ejector leversare half closed.

CAUTIONPush in the board slowly and steadily to avoid damage to the pins on the backplaneand the metal piece on the board.

4. Lower the ejector levers of the OMU board until they are in position, as shown in partC of Figure 7-3.

5. Secure the screws on the OMU board, as shown in part D of Figure 7-3.

NOTE

You need to push the screws inwards to secure the screws into the holes on the subrack.

l Inserting a Board (configuring the old ejector levers)

1. Take the new board out of the ESD box. Then, check the pins and the sockets of theboard.If there is any missing or broken pin, any bent ping or socket, contact Huawei engineersfor replacement.

2. Press the latch and turn the ejector lever outwards, as shown in parts A of Figure7-4. Turn the ejector lever into the position, as shown in part B of Figure 7-4.



7-9

Figure 7-4 Installing a BSC6900 board(configuring the old ejector levers)

3. Hold the panel with one hand and the lower edge of the board with the other hand,

and then push the board into the subrack along the guide rails until the ejector leversare half closed.

CAUTIONPush in the board slowly and steadily to avoid damage to the pins on the backplaneand the metal piece on the board.

4. Lower the ejector levers of the OMU board until they are in position, as shown in partC of Figure 7-4.

5. Secure the screws on the OMU board, as shown in part D of or Figure 7-4.

NOTE

You need to push the screws inwards to secure the screws into the holes on the subrack.

----End

7.3 Replacing a DPUa/DPUc/DPUd/DPUf BoardThis section describes how to replace a faulty DPUa/DPUc/DPUd/DPUf board. The DPUa/DPUc/DPUd/DPUf board is hot-swappable. It takes about two minutes to replace the board.




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Prerequisitel The tools are ready. The tools are the ESD wrist strap, Phillips screwdriver, and ESD box

or bag.l A new DPUa/DPUc/DPUd/DPUf board is ready.l The LMT is started and communicates with the OMU properly.

Context

CAUTIONl To avoid damage to the boards, ASIC chips, or other electronic components, wear an ESD

wrist strap properly. Ensure that the ESD wrist strap is properly connected to the ESDconnector on the cabinet. If no ESD wrist strap or no proper grounding point is available,wear ESD gloves.

l It is recommended that you use a board of the same type to replace the board. To use a boardof the different version to replace the board (for example, the board of version a replace theboard of version b), contact Huawei for technical support.

CAUTIONReplacing the DPUa/DPUc/DPUd/DPUf board disrupts all the services carried on the board.

Procedure

Step 1 Run the LST SUBRACK command to query the inhibited status of the board.

If... Then...

Logical inhibited board or Physicalinhibited board includes the DPUa/DPUc/DPUd/DPUf board to be replaced.

Go to Step 2.

Logical inhibited board or Physicalinhibited board does not include theDPUa/DPUc/DPUd/DPUf board to bereplaced.

1. Run the INH BRD command to physicallyinhibit the board.

2. Go to Step 2.NOTE

Physically inhibiting the DPUa/DPUc/DPUd/DPUfboard prevents new accesses from the board andreduces the impact of replacing the board on theBSC6900 operation.

Step 2 Remove the DPUa/DPUc/DPUd/DPUf board to be replaced by referring to 7.2.1 Removing aBoard.

Step 3 Insert the new board into the subrack by referring to 7.2.2 Inserting a Board.



7-11

The new board automatically loads program and configuration data, and the RUN LED blinksevery alternate 0.125s.

Step 4 Run the UIN BRD command to unblock the new board.

Step 5 Run the DSP BRD command to query the status of the new board.

If... Then...

CPU status is Active normal, Go to Step 7.

CPU status is not Active normal, Go to Step 6.

Step 6 Check whether a board failure alarm is reported on the LMT.

If... Then...

Alarms caused by a faulty board arereported,

1. Identify and rectify the fault according to thealarm information.

2. Go to Step 5.

No alarms caused by the faulty board arereported,

Go to Step 7.

Step 7 Run the CMP BRDVER command to check whether the software version of the new board isconsistent with the board version matching table.

If... Then...

The board version is consistent with theboard version matching table,

Go to Step 8.

The board version is inconsistent with theboard version matching table,

1. Ensure that the program files of the board inthe OMU active workspace installation\bin\fam on the OMU are correct. If the programfiles are incorrect, contact Huaweiengineers.

2. Run the RST BRD command to reset theboard.

3. Go to Step 5.

NOTE

You can obtain the correct board version matching table from the version matching documents.

Step 8 Test the CS services by dialing and the PS services by browsing web pages to ensure that thenew board is functional.

----End




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Follow-up ProcedureRecord the name and the bar code of the replaced board. Check whether there are obviousphysical damages, such as the distorted pin, broken pin, or burnt board. If there is any damage,fill in the BSC6900 site maintenance record and pack the replaced board. When packing a board,pay attention to the following points:l Wear an ESD wrist strap or a pair of ESD gloves.l Ensure that each ESD bag or case holds only one board.l When packing multiple boards, isolate them with ESD materials.Contact the local Huawei office to dispose of the replaced board.

NOTEYou may obtain the name and the PCB version from the panel or bottom of the faulty board.

7.4 Replacing an EIUa BoardThis section describes how to replace a faulty EIUa board. The EIUa board is hot-swappable. Ittakes about eight minutes to replace an EIUa board.

Prerequisitel The tools are ready. The tools are the ESD wrist strap, Phillips screwdriver, flat-head

screwdriver, and ESD box or bag.l A new EIUa board is ready.l The LMT is started and communicates with the OMU properly.

Context




CAUTIONl Replacing the standby EIUa has no adverse impact on the system. Replacing the EIUa board

that works independently, however, disrupts services carried on this board.l If the BSC6900 and its peer equipment are connected through only the EIUa board, the

ongoing services between the BSC6900 and its peer equipment are disrupted when youreplace the EIUa board.



7-13

Procedure

Step 1 Run the LST SUBRACK command to query the backup status of the EIUa board to be replaced.

If... Then...

Backup type is Backup, Go to Step 2.

Backup type is No backup, Go to Step 3.

NOTE

If two BSC6900 boards work in backup mode, the boards must be installed in an even-numbered slot andin the slot numbered with that value plus 1. For example, if the board that is installed in slot 14 does notwork in backup mode, the board that is installed in slot 15 does not work in backup mode either.

Step 2 Run the DSP BRD command to query the status of the board to be replaced.

If... Then...

CPU status is Active normal, 1. Run the SWP BRD command to switch the boardover to standby status.

2. Go to Step 3.CAUTION

A forced active/standby switchover may affect the runningof the system. Therefore, run this command when thetraffic is light, for instance, at midnight.

The parameter is of any other values, Go to Step 3.

Step 3 Check whether the labels on the E1/T1 cable and clock cable (if configured) connected to theEIUa are legible. If the labels are illegible, attach a new label to the cables to avoid improperconnection after the board is replaced.

Step 4 Disconnect the clock cable. Loosen the captive screws from the E1/T1 cable connector with aflat-head screwdriver and disconnect the E1/T1 cable.

Step 5 Remove the board to be replaced by referring to 7.2.1 Removing a Board.

Step 6 Check whether the settings of the 10.2 DIP Switches on the EIUa Board of the standby boardare correct.

If... Then...

The settings are correct, Go to Step 7.

The settings are incorrect, 1. Set the DIP switches correctly.2. Go to Step 7.

Step 7 Install the new board into the subrack by referring to 7.2.2 Inserting a Board.




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The new board automatically loads program and configuration data, and the RUN LED blinksevery other 0.125s.

Step 8 Install the cables for the board.

If... Then...

The E1/T1 cables are connected to theboard,

Insert the E1/T1 connector into the socket onthe board, and use a Phillips screwdriver totighten the screws on the E1/T1 connector.

The 75-ohm clock cables are connected tothe board,

Insert the clock cables.

Step 9 If the RUN LED blinks every other second, run DSP BRD to query the status of the new board.

If... Then...

CPU status is Active normal or Standby normal, Go to Step 11.


Step 10 Check whether a board failure alarm is reported on the BSC6900 LMT.

If... Then...


1. Locate and rectify the fault according to thealarm help information.

2. Go to Step 9.


Go to Step 11.


If... Then...


Go to Step 12.


1. Ensure that the program files of the board inthe OMU active workspace installation\bin\fam on the OMUa are correct. If theprogram files are incorrect, contact Huaweiengineers.

2. Run RST BRD to reset the board.3. Go to Step 9.



7-15

NOTE


Step 12 Verify this board is functioning correctly by testing the CS services with dialing and PS serviceswith web browsing.

----End

Follow-up Procedure

Record the name and the bar code of the replaced board. Check whether there are obviousphysical damages, such as the distorted pin, broken pin, or burnt board. If there is any damage,fill in the BSC6900 site maintenance record and pack the replaced board. When packing a board,pay attention to the following points:

l Wear an ESD wrist strap or a pair of ESD gloves.

l Ensure that each ESD bag or case holds only one board.

l When packing multiple boards, isolate them with ESD materials.

Contact the local Huawei office to dispose of the replaced board.


7.5 Replacing an FG2a BoardThis section describes how to replace a faulty FG2a board. The FG2a board is hot swappable.It takes about five minutes to replace the board.


screwdriver, and ESD box or bag.

l A new FG2a board is ready.

l The LMT is started and communicates with the OMU properly.

Context







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CAUTIONl If the FG2a board is standby and the data over the port on the FG2a board are backed up,

replacing the standby FG2a board has no adverse effect on the system.

l When the FG2a boards work in board backup mode and the ports work in load sharing mode,replacing the standby FG2a board disrupts part of services if the traffic over the ports exceedsthe bandwidth of the ports on the active board. When the FG2a boards work in board backupmode with independent ports, replacing the standby FG2a board disrupts all the servicescarried on the standby board.

l Replacing an FG2a board that works independently disrupts all the services on the board.

l If the BSC6900 and its peer equipment are connected through only the FG2a board, theongoing services between the BSC6900 and its peer equipment are disrupted when youreplace the FG2a board.

Procedure

Step 1 Run the LST SUBRACK command to query the backup status of the FG2a board to be replaced.

If... Then...



NOTE


Step 2 Run the DSP BRD command to query the status of the FG2a board to be replaced.

If... Then...





Step 3 Run the DSP ETHPORT command to query the backup status of all the ports on the FG2aboard to be replaced.



7-17

If... Then...

The ports are standby, Go to Step 4.

The ports are active, 1. Run the SWP ETHPORT command to switch the active port tostandby status.

2. Go to Step 4.

Step 4 Check whether the labels on the Ethernet cable connected to the FG2a board are legible. If thelabels are illegible, attach a new label to the Ethernet cable to avoid improper connection afterreplacing the board.

Step 5 Disconnect the Ethernet cable from the replaced board.




Step 8 Install the Ethernet cables by referring to the labels.


If... Then...




If... Then...



2. Go to Step 9.


Go to Step 11.


If... Then...


Go to Step 12.




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If... Then...




NOTE



----End



7.6 Replacing an FG2c BoardThis section describes how to replace a faulty FG2c board. The FG2c board is hot-swappable.It takes about five minutes to replace the board.


screwdriver, and ESD box or bag.l A new FG2c board is ready.l The LMT is started and communicates with the OMU properly.



7-19

Context




CAUTIONl If the FG2c board is standby and the ports on the FG2c board are backed up, replacing the

standby FG2c board has no adverse effect on the system.

l When the FG2c boards work in backup mode and the ports work in load sharing mode,replacing the standby FG2c board disrupts part of services if the total traffic over the portsexceeds the bandwidth of the ports on the active board. When the FG2c boards work inbackup mode with independent ports, replacing the standby FG2c board disrupts all theservices carried on the standby board.

l Replacing an FG2c board that works independently disrupts all the services on the board.

l If the BSC6900 and its peer equipment are connected through only the FG2c board, theongoing services between the BSC6900 and its peer equipment are disrupted when youreplace the FG2c board.

Procedure

Step 1 Run the LST SUBRACK command to query the backup status of the FG2c board to be replaced.

If... Then...



NOTE


Step 2 Run the DSP BRD command to query the status of the FG2c board to be replaced.




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If... Then...

CPU status is Active normal, 1. Run the SWP BRD command to switch the boardto standby status.


A forced active/standby switchover may affect the runningof the system. Therefore, run this command in low traffichours, for instance, at midnight.


Step 3 Run the DSP ETHPORT command to query the backup status of all the ports on the FG2cboard to be replaced.

If... Then...



2. Go to Step 4.

Step 4 Check whether the labels on the Ethernet cable connected to the FG2c board are legible. If thelabels are illegible, attach a new label to the Ethernet cable to avoid improper connection afterreplacing the board.

Step 5 Disconnect the Ethernet cable from the replaced board.


Step 7 Install the new board into the subrack by referring to 7.2.2 Inserting a Board.The new board automatically loads program and configuration data, and the RUN LED blinksevery other 0.125s.

Step 8 Install the Ethernet cables by referring to the labels.

Step 9 If the RUN LED blinks every other second, run the DSP BRD command to query the status ofthe new board.

If... Then...






7-21

If... Then...



2. Go to Step 9.


Go to Step 11.


If... Then...


Go to Step 12.


1. Ensure that the program files of the board inthe OMU active workspace installation\bin\fam on the OMUa board are correct. If theprogram files are incorrect, contact Huaweiengineers.


3. Go to Step 9.

NOTE



----End

Follow-up Procedure










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7.7 Replacing a GCUa/GCGa BoardThis section describes how to replace a faulty GCUa/GCGa board. The GCUa/GCGa board ishot-swappable. It takes about five minutes to replace the board.


screwdriver, and ESD box or bag.

l A new GCUa/GCGa board is ready.


Context




CAUTIONReplacing the standby GCUa/GCGa board has no adverse impact on the services in the system.Replacing the GCUa/GCGa board that works independently, however, disrupts services carriedin the BSC6900.

Procedure

Step 1 Display the MPS in the Device Panel on the LMT. Check the configuration of the GCUa/GCGaboard.

If... Then...

Slots 12 and 13 are configured with the GCUa/GCGa boards, Go to Step 2.

Slot 12 or 13 is configured with the GCUa/GCGa board, Go to Step 3.

Step 2 Run the DSP BRD command to query the status of the board.



7-23

If... Then...





Step 3 Check whether the labels on the cables connected to the GCUa/GCGa board are legible. If thelabels are illegible, attach a new label to the cables to avoid improper connection after the boardis replaced.

Step 4 Disconnect the cables from the faulty board.

Step 5 Remove the GCUa/GCGa board to be replaced by referring to 7.2.1 Removing a Board.



Step 7 Install the cables by referring to the labels.


If... Then...

If the CPU status of only one GCUa/GCGa board is Active normal, Go to Step 10.

If the CPU status of two GCUa/GCGa boards is Standby normal, Go to Step 10.



If... Then...



2. Go to Step 8.


Go to Step 10.





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If... Then...


Go to Step 11.




NOTE


Step 11 Run the DSP CLK command to query the clock status of the SCUa board in the MPS.

If... Then...

If the clock status of the SCUa board is Normal, The replacement is complete.

If the clock status of the SCUa board is Abnormal, Go to Step 8.

----End

Follow-up Procedure







7.8 Replacing a GOUa BoardThis section describes how to replace a faulty GOUa board. The GOUa board is hot-swappable.It takes about five minutes to replace the board.



7-25


screwdriver, ESD box or bag, dustfree cotton cloth, and fiber cleaner.

l A new GOUa board is ready.


Context




CAUTIONl If the GOUa board is standby and the data over the port on the GOUa board are backed up,

replacing the standby GOUa board has no adverse effect on the system.

l When the GOUa boards work in board backup mode and the ports work in load sharing mode,replacing the standby GOUa board disrupts part of services if the total traffic over the portsexceeds the bandwidth of the ports on the active board. When the GOUa boards work inboard backup mode with independent ports, replacing the standby GOUa board disrupts allthe services carried on the standby board.

l Replacing a GOUa board that works independently disrupts the services on that board.

l If the BSC6900 and its peer equipment are connected through only the GOUa board, theongoing services between the BSC6900 and its peer equipment are disrupted when youreplace the GOUa board.

Procedure

Step 1 Run the LST SUBRACK command to query the backup status of the GOUa board to be replaced.

If... Then...






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NOTE


Step 2 Run the DSP BRD command to query the status of the GOUa board to be replaced.

If... Then...





Step 3 Run the DSP ETHPORT command to query the backup status of all the ports on the GOUaboard to be replaced.

If... Then...



2. Go to Step 4.

Step 4 Check whether the labels on the optical cable connected to the GOUa are legible. If the labelsare illegible, attach a new label to the cable to avoid improper connection after the board isreplaced.

Step 5 Remove the optical cables and cap the connectors. If the connectors are dirty, clean them withthe dustfree cotton cloth or the fiber cleaner.

Step 6 Remove the board by referring to 7.2.1 Removing a Board and cap the optical ports.

Step 7 Install the new board into the subrack by referring to 7.2.2 Inserting a Board.The new board automatically loads program and configuration data, and the RUN LED blinksevery other 0.125s.

Step 8 Remove the caps from optical ports and connectors, and reserve them for later use. Then, installthe optical cables by referring to the labels.


If... Then...




7-27

If... Then...

The CPU is in another status, Go to Step 10.


If... Then...



2. Go to Step 9.


Go to Step 11.


If... Then...


Go to Step 12.




NOTE



----End

Follow-up ProcedureRecord the name and the bar code of the replaced board. Check whether there are obviousphysical damages, such as the distorted pin, broken pin, or burnt board. If there is any damage,fill in the BSC6900 site maintenance record and pack the replaced board. When packing a board,pay attention to the following points:l Wear an ESD wrist strap or a pair of ESD gloves.l Ensure that each ESD bag or case holds only one board.l When packing multiple boards, isolate them with ESD materials.




Issue 05 (2011-05-19)



7.9 Replacing a GOUc BoardThis section describes how to replace a faulty GOUc board. The GOUc board is hot-swappable.It takes about five minutes to replace the board.



l A new GOUc board is ready.


Context




CAUTIONl If the GOUc board is standby and the ports on the GOUc board are backed up, replacing the

standby GOUc board has no adverse effect on the system.

l When the GOUc boards work in backup mode and the ports work in load sharing mode,replacing the standby GOUc board disrupts part of services if the total traffic over the portsexceeds the bandwidth of the ports on the active board. When the GOUc boards work inbackup mode with independent ports, replacing the standby GOUc board disrupts all theservices carried on the standby board.

l Replacing a GOUc board that works independently disrupts the services on the board.

l If the BSC6900 and its peer equipment are connected through only the GOUc board, theongoing services between the BSC6900 and its peer equipment are disrupted when youreplace the GOUc board.



7-29

Procedure

Step 1 Run the LST SUBRACK command to query the backup status of the GOUc board to be replaced.

If... Then...



NOTE


Step 2 Run the DSP BRD command to query the status of the GOUc board to be replaced.

If... Then...





Step 3 Run the DSP ETHPORT command to query the backup status of all the ports on the GOUcboard to be replaced.

If... Then...



2. Go to Step 4.

Step 4 Check whether the labels on the optical cables connected to the GOUc board are legible. If thelabels are illegible, attach a new label to the cables to avoid improper connection after the boardis replaced.

Step 5 Remove the optical cables and cap the connectors. If the connectors are dirty, clean them withdustfree cotton cloth or fiber cleaner.






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Step 8 Remove the caps from optical ports and connectors, and keep them for later use. Then, installthe optical cables by referring to the labels.


If... Then...




If... Then...



2. Go to Step 9.


Go to Step 11.


If... Then...


Go to Step 12.




3. Go to Step 9.

NOTE



----End



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7.10 Replacing an MDMC BoardThis section describes how to replace a faulty MDMC board. The MDMC board is hot-swappable. It takes about ten minutes to replace the board.

Prerequisitel The tools are ready. They are the ESD wrist strap, Phillips screwdriver, and ESD box or

bag.l A new MDMC board is ready for use.l The LMT is started, and the connection between the LMT PC and the server is normal.

Context

CAUTIONl You are required to Wear an ESD Wrist Strap and plug the ESD wrist strap into the ESD

connector of the cabinet before replacing the board. If the ESD wrist strap is unavailable orif there is no ESD connector for the ESD wrist strap, wear ESD gloves.

l During the replacement of the MDMC board, the power distribution monitor function isunavailable.

Procedure

Step 1 Record the state of the mute switch on the front panel of the power distribution box.For the position of the mute switch, see Panel of the MDMC Board.

Step 2 Set all the bits of DIP switch S2 on the new MDMC board to ON, as shown in Figure 7-5.




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Figure 7-5 Settings of DIP switch S2 on the MDMC board

Step 3 Remove the captive screw on the MDMC board with a Phillips screwdriver.

Step 4 Hold the handle of the MDMC board and remove the board from the power distribution box.Then, put the MDMC board into an ESD box or bag.

CAUTIONThe MDMC board is twice as long as other boards. To avoid damaging the MDMC board duringthe replacement, move the board only after you have completely removed the board from thecabinet.

Step 5 Insert the new MDMC board into the power distribution box along the guide rails.

Step 6 Secure the captive screw on the MDMC board.

Step 7 Set the mute switch on the new MDMC board according to the recorded settings.

Step 8 When the RUN LED blinks every alternate 0.25s, it indicates that the new board is automaticallyloading the data configuration file.

For details about the state of the LEDs on the board, see 10.3 DIP Switch on the MDMCBoard.

NOTE

When the RUN LED blinks every alternate 0.25s or the ALM LED is on, you must remove the MDMCboard and install the board again to ensure that the MDMC board is fully in contact with the backplane.

Step 9 When the RUN LED blinks every alternate second, it indicates that the board works properly.

Step 10 On the LMT, choose Alarm > Browse Alarm to check whether a board failure alarm is reported.

If such an alarm is reported, identify and rectify the fault according to the alarm information.

----End

Follow-up ProcedureRecord the name and the bar code of the replaced board. Check whether there are obviousphysical damages, such as the distorted pin, broken pin, or burnt board. If there is any damage,fill in the BSC6900 site maintenance record and pack the replaced board. When packing a board,pay attention to the following points:l Wear an ESD wrist strap or a pair of ESD gloves.



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7.11 Replacing an OIUa BoardThis section describes how to replace a faulty OIUa board. The OIUa board is hot-swappable.It takes about five minutes to replace the board.



l A new OIUa board is ready.


Context




CAUTIONl Replacing the standby OIUa board has no adverse impact on the system. When no standby

OIUa board is in position, replacing the board disrupts services carried on this board.

l If the BSC6900 and its peer equipment are connected through only the OIUa board, theongoing services between the BSC6900 and its peer equipment are disrupted when youreplace the OIUa board.

Procedure

Step 1 Run the LST SUBRACK command to query the backup status of the OIUa board to be replaced.




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If... Then...



NOTE



If... Then...

CPU status is Normal, 1. Run the SWP BRD command to switch the boardover to standby status.




Step 3 Run the DSP OPT command to query the backup status of all the optical ports on the OIUaboard to be replaced.

If... Then...

The optical port is standby, Go to Step 4.

The optical port is active, 1. Run the SET MSPCMD command to switch the active portover to standby status. Set MSP Control Command to MS(Manual Switchover from working link to protectionlink).

2. Go to Step 4.

Step 4 Check whether the labels on the optical cable and clock cable (if configured) connected to theOIUa are legible. If the labels are illegible, attach a new label to the cables to avoid improperconnection after the board is replaced.

Step 5 Remove the clock cable.

Step 6 Remove the optical cable and cap the connectors. If the connectors are dirty, clean them withthe dustfree cotton cloth or the fiber cleaner.





7-35


Step 9 Remove the caps from optical ports and connectors, and reserve them for later use. Then, installthe optical cables by referring to the labels.

Step 10 Install the clock cable (if configured) by referring to the labels.


If... Then...




If... Then...



2. Go to Step 11.


Go to Step 13.


If... Then...


Go to Step 14.




NOTE



----End




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7.12 Replacing an OMU BoardThis section describes how to replace a faulty OMU board. The OMU board is hot-swappable.It takes about 16 minutes to replace an OMU board.

Prerequisitel The required tools are ready, including ESD wrist strap, Phillips screwdriver, and ESD box

or bag.l The OMU operating system installation files, OMU applications, and OMU configuration

data are available. The following information is the same between the new OMU boardand the OMU board to be replaced:– Password for the administrator of the Linux operating system– FTP server password– Administrator password– External virtual IP address of the OMU board– Internal and external fixed IP addresses of the OMU board– Computer name of the OMU board– Operating system of the OMU board

ContextThe situation where an OMU board is replaced is complex. Therefore, you should follow theflowchart shown in Figure 7-6 to determine which operation to perform, and then follow theprocedures shown in Figure 7-7 to replace an OMU board.



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Figure 7-6 Procedure for determining an operation




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Figure 7-7 Procedures for replacing an OMU board



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CAUTIONl Procedures for replacing a pair of active and standby OMU boards are different from those

for replacing an independent OMU board.l The new OMU board can use the same operating system as the replaced OMU board or use

a different operating system, but operating systems of active and standby OMU boards mustbe the same.

l You must wear an ESD wrist strap and plug the ESD wrist strap into the ESD connector onthe cabinet before replacing an OMU board. Wear an ESD wrist strap by referring to Wearingan ESD Wrist Strap. Wear a pair of ESD gloves instead if there is no ESD wrist strap or thereis no ESD connector for the ESD wrist strap.

l Replacing the standby OMU board has no adverse impact on the system operation. Replacingan OMU board that works independently, however, will interrupt the communicationbetween the OMU and the host boards. In addition, the system operation data will be lost.

l This task uses one OMU board as an example for your reference only. If the main processingsubrack (MPS) is configured with two OMU boards that must be replaced, follow theinstructions in this section to replace the other OMU board.

7.12.1 Checking the OMU InformationThis section describes how to check information about the OMU board to be replaced. Theinformation includes active/standby state, data synchronization state, and IP addresses.

7.12.2 Backing Up System FilesThis section describes how to back up system files.

7.12.3 Replacing the OMU BoardThis section describes how to replace the OMU board. You need to remove the OMU boardbefore installing a new one.

7.12.4 Installing the Operating System and Loading the OMU ApplicationsThis section describes how to install the OMU operating system and load the OMU applications.

7.12.5 Verifying OMU Board ReplacementThis section describes how to verify OMU board replacement to ensure that the OMU board isreplaced properly.

7.12.1 Checking the OMU InformationThis section describes how to check information about the OMU board to be replaced. Theinformation includes active/standby state, data synchronization state, and IP addresses.

Prerequisitel Users can perform operation and maintenance on the OMU.l If the OMU board is faulty and the operation and maintenance function is unavailable,

check whether the ALM-20701 OMU Failure Switchover is reported. If the alarm isreported, clear the alarm, obtain the latest backup OMU data, and then go to 7.12.2 BackingUp System Files.




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Procedure

Step 1 Run the MML command DSP OMU to query the information on the OMU board to be replaced.Then, record the information, as shown in Table 7-2.

Table 7-2 OMU information table

Item Sample

Computer name OMU_21

Internal fixed IP address 80.168.3.50

External fixed IP address 10.168.172.2

Backup channel IP address 192.168.3.50

Operational state Active normal

Version XXXXXX

External virtual IP address 10.168.192.5

External virtual mask 255.255.254.0

Data synchronization state Data synchronization is normal.

Step 2 Display the subrack that holds the OMU board in the Device Panel on the LMT. Check theconfiguration of the OMU board.

NOTEIf the OMU board cannot communicate with the LMT, check the configuration of the OMU board bychecking the MPS in the equipment room.

If... Then...

Two OMU boards are configured in the MPS, Go to Step 3.

Only one OMU board is configured in the MPS, Go to 7.12.2 Backing Up System Files.

Step 3 Check the active/standby state of the OMU board.

If... Then...

The board is in Standby normal state, Go to 7.12.2 Backing Up System Files.

The board is in Active normal state, Go to Step 4.

Step 4 Check the data synchronization state of the OMU board.



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If... Then...

The board is not in Datasynchronization normal state,

Clear alarms by referring to ALM-20701OMU Failure Switchover andALM-20704 OMU Data SynchronizationFailure. Go to Step 5 after the alarms arecleared.

The board is in Data synchronizationnormal state,

Go to Step 5.

Step 5 Run the SWP OMU command to manually switch over the active and standby OMU boards.Five minutes later, run the DSP OMU command to check that the OMU board to be replacedis in the standby state. Go to 7.12.2 Backing Up System Files.

----End

7.12.2 Backing Up System FilesThis section describes how to back up system files.

Prerequisitel If the BSC6900 is configured with active and standby OMU boards and both of them need

to be replaced, make two USB storage devices ready.l If the BSC6900 is configured with active and standby OMU boards and only the standby

OMU board needs to be replaced, make one USB storage device ready.

Procedure

Step 1 Optional: If the new OMU board runs the Dopra Linux operating system, prepare a USBinstallation disk before replacing an OMU board. For details, see Preparing the USB StorageDevice.




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CAUTIONl Prepare a USB installation disk whose operation mode is Switch. If it fails to be prepared,

prepare a USB installation disk whose operation mode is Install.l Select Install OMU?, and select version package and patch package if a USB installation

disk whose operation mode is Install is used. In this way, you can use the USB installationdisk to install both the OMU operating system and OMU applications.

l If the BSC6900 is configured with active and standby OMU boards and only the standbyOMU board needs to be replaced, click OK when you a message is displayed, requestingyou to confirm for which OMU the USB installation disk is prepared. Do not remove theUSB storage device from the USB port when you are preparing the USB installation disk. AUSB installation disk for the standby OMU is obtained after it is prepared.

l If the BSC6900 is configured with active and standby OMU boards and both of the themneed to be replaced, attach labels on the USB installation disks. This helps distinguish forwhich OMU they are prepared and determine which USB installation disk to use for installingthe OMU operating system and applications.

Step 2 Check whether system files need to be backed up.

If... Then...

Any of the following conditions is met,l Users cannot use the opearation and

maintenance function of the OMU andbackup files have been obtained.

l The MPS is configured with two OMUboards.

l A USB installation disk whose operationmode is Switch is used for installing theoperating system of the new OMU board.

Go to 7.12.3 Replacing the OMU Board.

In other cases, Go to Step 3.

Step 3 Run the MML command BKP DB with Path of Backup File and File Name set to appropriatevalues to back up system files to the specified directory.

Step 4 Save the performance configuration file, SSL certificate file, license file, and OMU databasefile backed up in Step 3 to the local PC by referring to Transferring and Backing Up Files.

NOTE

l Save the performance configuration file in \bam\version_a\ftp\DefaultMeas.

l Save the SSL certificate file in \bam\version_a\ftp\cert.

l Save the license file in \bam\version_a\ftp\license.

----End

7.12.3 Replacing the OMU BoardThis section describes how to replace the OMU board. You need to remove the OMU boardbefore installing a new one.



7-43

Prerequisitel If the new OMU board runs the Dopra Linux operating system, ensure that a USB

installation disk is prepared and inserted into any of the USB ports on the OMU boardpanel.

Procedurel Removing an OMU board that is configured with new ejector levers

1. Shut down the operating system of the OMU board. For details, see Shutting Downthe OMU.

2. Unscrew the captive screws on the OMU board counterclockwise, as shown in part Aof Figure 7-8.

Figure 7-8 Removing an OMU board that is configured with new ejector levers

NOTE

The preceding figure uses an OMUa/OMUb board as an example for your reference only. Theprocedure for removing an OMUc board is similar to that for removing an OMUa/OMUb board.




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3. Press and hold the two locking buttons, flip outward the ejector levers on the OMUboard panel to unlock them, and rotate them outward. The OMU board is separatedfrom the backplane, as shown in part B of Figure 7-8.

4. Remove the Ethernet cable, mouse cable, keyboard cable, and monitor cable (ifconfigured) from the OMU board when the OFFLINE LED is on.

5. Remove the OMU board along the guide rails, as shown in part C of Figure 7-8.

6. Press and hold the two locking buttons, flip outward the ejector levers to make themseparated from the spring plate, and rotate them until they cannot be rotated, as shownin part A of Figure 7-9.

7. Slide the new board along the guide rails into the subrack, as shown in part B of Figure7-9.

Figure 7-9 Installing an OMU board that is configured with new ejector levers

8. Flip inward the ejector levers of the OMU board until they are in position, as shownin part C of Figure 7-9.


The new board automatically loads software and configuration data, and the RUNLED blinks 0.125 second on and 0.125 second off.

10. Connect the cables by referring to the labels.



7-45

l Removing an OMU board that is configured with old ejector levers1. Shut down the operating system of the OMU board. For details, see Shutting Down

the OMU.2. Unscrew the captive screws on the OMU board counterclockwise, as shown in part A

of Figure 7-10.

Figure 7-10 Removing an OMU board that is configured with old ejector levers

3. Flip outward the ejector levers of the OMU board, as shown in part B of Figure

7-10.4. Remove the Ethernet cable, mouse cable, keyboard cable, and monitor cable (if

configured) from the OMU board when the OFFLINE LED is on.5. Remove the OMU board along the guide rails, as shown in part C of Figure 7-10.6. Flip outward the ejector levers of the new OMU board, as shown in part A of Figure

7-11.7. Slide the new board along the guide rails into the subrack, as shown in part B of Figure

7-11.




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Figure 7-11 Installing an OMU board that is configured with old ejector levers

8. Flip inward the ejector levers of the OMU board until they are in position, as shownin part C of Figure 7-11.


The new board automatically loads software and configuration data, and the RUNLED blinks 0.125 second on and 0.125 second off.

10. Connect the cables by referring to the labels.

----End

7.12.4 Installing the Operating System and Loading the OMUApplications

This section describes how to install the OMU operating system and load the OMU applications.

Contextl The BSC6000 runs the Suse Linux operating system, while the BSC6900 runs the Dopra

Linux operating system. After the BSC6000 is upgraded to the BSC6900, the new BSC6900can either retain the Suse Linux operating system or switch to the Dopra Linux operatingsystem.



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CAUTIONl If a pair of active/standby OMU boards are configured in the MPS, they must run the same

operating system.

Procedurel BSC6900 deployment

1. Install the Dopra Linux operating system and load the OMU applications by referringto Installing the OMU Operating System from a USB Storage Device.

2. Determine whether to restore data and activate the license file and the SSL certificatefile.

If... Then...

The operation mode of the USBinstallation disk is Switch,

End this task.

The operation mode of the USBinstallation disk is Install,

Go to Step 3.

3. Restore the backup OMU data on the new OMU board by referring to Restoring the

System Data.4. Upload the backup license file to the new OMU board and activate the license file by

referring to Activating and Verifying the License.5. Upload the backup SSL certificate file to the new OMU board by referring to

Transferring and Backing Up Files, and then run the MML command SETCERTFILE to activate the SSL certificate file.

l Upgrade of the BSC6000 to the BSC69001. Determine whether to switch the operating system.

If... Then...

The Suse Linux operating system isused,

Go to Step 2.

The Dopra Linux operating system isused,

Install the OMU operating system andOMU applications by referring toInstalling the OMU Operating Systemfrom a USB Storage Device. End thistask.

2. Reinstall the Suse Linux operating system by referring to Re-Installing the Suse Linux

Operating System.3. Install the OMU applications by referring to Optional: Installing the OMU

Applications.4. Determine whether to restore data and activate the license file and the SSL certificate

file.




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If... Then...

l The operation and maintenancefunction is available and a pair ofactive/standby OMU boards areconfigured,

l The operation and maintenancefunction is available, one OMUboard is configured, and a USBinstallation disk whose operationmode is Switch is used to install theDopra Linux operating system on thenew OMU board,

Go to 7.12.5 Verifying OMU BoardReplacement .


5. Restore the backup OMU data on the new OMU board by referring to Restoring the

System Data.6. Upload the backup license file to the new OMU board and activate the license file by

referring to Activating and Verifying the License.7. Upload the backup SSL certificate file to the new OMU board by referring to

Transferring and Backing Up Files, and then run the MML command SETCERTFILE to activate the SSL certificate file.

----End

7.12.5 Verifying OMU Board ReplacementThis section describes how to verify OMU board replacement to ensure that the OMU board isreplaced properly.

Procedure

Step 1 Run the DSP OMU command to query the status of the new OMU board.

If... Then...

Two OMU boards are configured and the Operation status is Standbynormal,

Go to Step 3.


Step 2 On the Browse Alarm tab page on the LMT, check whether alarms such as board fault alarmsare reported.



7-49

If... Then...

Alarms such as board fault alarms arereported,

1. Find out the cause of the alarms and clearthe alarms.

2. Go to 7.12.4 Installing the OperatingSystem and Loading the OMUApplications.

Alarms such as board fault alarms are notreported.

Go to Step 3.

Step 3 Run the DSP OMUMODULE command to view the status of the OMU processes. For details,see Querying the Operating Status of the OMU.

If... Then...

State is Active or Stopped, Board replacement is complete.

State is Faulty, Contact Huawei for technical support.

----End

Follow-up Procedure




l When packing multiple boards, isolate them with ESD materials.Contact the local Huawei office to dispose of the replaced board.


7.13 Replacing an SCUa BoardThis section describes how to replace a faulty SCUa board. The SCUa board is hot-swappable.It takes about four minutes to replace the board.

Prerequisitel The tools are ready. The tools are the ESD wrist strap, Phillips screwdriver, ESD box or

bag, dustfree cotton cloth, and fiber cleaner.

l A new SCUa board is ready.





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Context




CAUTIONl Replacing the standby SCUa board decreases the internal switching capacity and has no effect

on the services in the system.l When no standby board is in position, replacing the SCUa board in the MPS resets all the

other boards in the MPS and disrupts all the ongoing services in the subrack.l When no standby board is in position, replacing the SCUa board in the EPS/TCS resets all

the other boards in the EPS/TCS and disrupts all the ongoing services in the subrack. Inaddition, the communication between the EPS/TCS and the MPS is disrupted.

Procedure

Step 1 Display the subrack that houses the SCUa board in the Device Panel on the LMT. Check theconfiguration of the SCUa board.

If... Then...

Slots 6 and 7 are configured with the SCUa boards, Go to Step 2.

Slot 6 or 7 is configured with the SCUa board, Go to Step 3.


If... Then...

CPU status is Active normal, 1. Run SWP BRD to switch the board over tostandby.





7-51

If... Then...


Step 3 Check whether the labels on the cables connected to the SCUa are legible. If the labels areillegible, re-label the cables to avoid faulty connections after replacing the board.







If... Then...

Only one SCUa board is configured and the CPU status is Activenormal,

Go to Step 10.

Two SCUa boards are configured and the CPU status is Standbynormal,

Go to Step 10.



If... Then...



2. Go to Step 8.


Go to Step 10.


If... Then...


Go to Step 11.




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If... Then...




NOTE



----End



7.14 Replacing a TNUa BoardThis section describes how to replace a faulty TNUa board. The TNUa board is hot-swappable.It takes about four minutes to replace the board.


bag, dustfree cotton cloth, and fiber cleaner.l A new TNUa board is ready.l The LMT is started and communicates with the OMU properly.



7-53

Context




CAUTIONl Replacing the standby TNUa board decreases the internal switching capacity and has no

impact on the ongoing services.l When no standby board is in position, replacing the TNUa board in the MPS resets all the

other boards in the MPS and disrupts all the ongoing services in the subrack.l When no standby board is in position, replacing the TNUa board in the EPS/TCS resets all

the other boards in the EPS/TCS and disrupts all the ongoing services in the subrack. Inaddition, the communication between the EPS/TCS and the MPS is disrupted.

Procedure

Step 1 Display the subrack that houses the TNUa board in the Device Panel on the LMT. Check theconfiguration of the TNUa board.

If... Then...

Slots 4 and 5 are configured with the TNUa boards, Go to Step 2.

Slot 4 or 5 is configured with the TNUa board, Go to Step 3.


If... Then...







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If... Then...


Step 3 Check whether the labels on the cables connected to the TNUa board are legible. If the labelsare illegible, attach a new label to the cables to avoid improper connection after the board isreplaced.







If... Then...

Only one TNUa board is configured, and the CPU status is Activenormal,

Go to Step 10.

Two SCUa boards are configured and the CPU status is Standbynormal,

Go to Step 10.



If... Then...



2. Go to Step 8.


Go to Step 10.


If... Then...


Go to Step 11.



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If... Then...




NOTE



----End



7.15 Replacing an XPUa BoardThis section describes how to replace a faulty XPUa board. The XPUa board is hot-swappable.It takes about six minutes to replace and load a board.


bag, and dustfree cotton cloth.l A new XPUa board is ready.l The LMT is started and communicates with the OMU properly.




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Context




CAUTIONl Replacing the standby main control XPUa board has no adverse impact on the services in

the system. Replacing the main control XPUa board that works independently, however,disrupts services carried in the subrack.

l Replacing the standby non main control XPUa board has no adverse impact on the servicesin the system. Replacing the non main control XPUa board that works independently,however, disrupts services carried in the board.

Procedure

Step 1 Display the subrack that houses the XPUa board in the Device Panel on the LMT. Check theconfiguration of the XPUa board.

If... Then...

The XPUa board to be replaced works in the active/standby mode, Go to Step 2.

The XPUa board to be replaced does not work in the active/standby mode, Go to Step 3.

NOTE


Step 2 Run the DSP BRD command to query the status of the XPUa board to be replaced.



7-57

If... Then...

CPU status is Active normal, 1. Run SWP BRD to switch the board over to standby.2. Go to Step 3.CAUTION

A forced active/standby switchover may affect the running ofthe system. Therefore, run this command when the traffic islight, for instance, at midnight.


Step 3 Remove the XPUa board to be replaced by referring to 7.2.1 Removing a Board.

Step 4 Insert the new XPUa board into the subrack by referring to 7.2.2 Inserting a Board.



If... Then...

The XPUa board to be replaced does not work in the active/standby mode,CPU status is Active normal,

Go to Step 7.

The XPUa board to be replaced works in the active/standby mode, CPUstatus is Standby normal,

Go to Step 7.



If... Then...



2. Go to Step 5.


Go to Step 7.


If... Then...


Go to Step 8.




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If... Then...




NOTE



----End



7.16 Replacing an XPUb BoardThis section describes how to replace a faulty XPUb board. The XPUb board is hot-swappable.It takes about six minutes to replace and load a board.


bag, and dustfree cotton cloth.l A new XPUb board is ready.l The LMT is started and communicates with the OMU properly.



7-59

Context




CAUTIONl Replacing the standby main control XPUb board has no adverse impact on the system.

Replacing the main control XPUb board that works independently, however, disruptsservices carried in the subrack.

l Replacing the standby non-main control XPUb board has no adverse impact on the system.Replacing the non-main control XPUb board that works independently, however, disruptsservices carried on the board.

Procedure

Step 1 Display the subrack that houses the XPUb board in the Device Panel on the LMT. Check theconfiguration of the XPUb board.

If... Then...

The XPUb board to be replaced works in active/standby mode, Go to Step 2.

The XPUb board to be replaced does not work in active/standby mode, Go to Step 3.

NOTE


Step 2 Run the DSP BRD command to query the status of the XPUb board to be replaced.




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If... Then...





Step 3 Remove the XPUb board to be replaced by referring to 7.2.1 Removing a Board.

Step 4 Install the new XPUb board into the subrack by referring to 7.2.2 Inserting a Board.The new board automatically loads program and configuration data, and the RUN LED blinksevery other 0.125s.


If... Then...

The XPUb board to be replaced does not work in active/standby mode,CPU status is Active normal,

Go to Step 7.

The XPUb board to be replaced works in active/standby mode, CPUstatus is Standby normal,

Go to Step 7.



If... Then...



2. Go to Step 5.


Go to Step 7.




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If... Then...


Go to Step 8.




3. Go to Step 5.

NOTE



----End

Follow-up Procedure







7.17 Replacing a WOPB BoardThis section describes how to replace a faulty WOPB board. The WOPB board is hot-swappable.It takes about ten minutes to replace the board.

Prerequisitel The tools are ready. They are the ESD wrist strap, Phillips screwdriver, and ESD box or

bag.

l A new WOPB board is ready according to field requirements.

l The LMT is started, and the connection between the LMT PC and the server is normal.




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Context


connector of the cabinet before replacing the board. If the ESD wrist strap is unavailable orif there is no ESD connector for the ESD wrist strap, wear ESD gloves.

l During the replacement of the WOPB board, the overvoltage protection function isunavailable.

Procedure

Step 1 Remove the captive screw on the WOPB board with a Phillips screwdriver, as shown in Figure7-12.

Figure 7-12 Replacing a WOPB board

Screw

WOPB

Handle

Step 2 Hold the handle of the WOPB board and remove the board from the power distribution box.Then, put the board into an ESD box or bag.

CAUTIONThe WOPB board is twice as long as other boards. To avoid damaging the WOPB board duringthe replacement, move the board only after you have completely removed the board from thecabinet.



7-63

Step 3 Insert the new WOPB board along the guide rails.

Step 4 Secure the captive screw on the WOPB board.

Step 5 Check whether a board failure alarm is reported on the LMT. If such an alarm is reported, identifyand rectify the fault according to the alarm information.

----End

Follow-up Procedure







7.18 Replacing a SubrackThis section describes how to replace a faulty BSC6900 subrack. It takes about 60 minutes toreplace a subrack.


screwdriver, diagonal pliers, dustfree cotton cloth, and fiber cleaner.

l A new subrack is ready.

Context

CAUTIONl To protect the components from electrostatic discharge, wear an ESD wrist strap properly.


l Replacing the MPS disrupts all the services carried in the BSC6900.

l Replacing the EPS/TCS disrupts all the services carried in this subrack.

l You should quickly replace a subrack with caution when the traffic is light, for instance, atmidnight.

l For safety reason, three persons are required to replace a subrack due to the heavy weight.




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Procedure

Step 1 Check whether the labels on the cables that are connected to the subrack are legible. If the labelsare illegible, attach a new label to the cables to avoid wrong connection after replacing thesubrack.

Step 2 Record the installation positions of the boards in the subrack.

Step 3 Check the type of subrack to be replaced.

If the subrack is... Then...

EPS/TCS, Turn off the power switches controlling the subrack to be replaced.

MPS, 1. Flip open the ejector levers of the OMUa board, as shown in part Bof Removing the OMUa board. Repeat this step if two OMUaboards are in the subrack.

2. After the OFFLINE LED on the OMUa board is ON, turn off thepower switches that controls the subrack to be replaced.

NOTE

For distribution of the BSC6900 power switches, see the labels on the front panel of the power distributionbox. For details, see 4.2 Distribution of Power Switches on the High-Power PDB, 4.1 Distribution ofPower Switches on the Common Power Distribution Box.

Step 4 Remove the cables connected to the subrack by referring to 8 Replacing the Cables.

Step 5 Remove the boards from the subrack in order by referring to 7.2.1 Removing a Board. Then,put them in the ESD boxes or bags.

Step 6 Remove the eight captive screws fixing the subrack on the cabinet from the front of the cabinetand reserve them for future use.

Step 7 One person pushes the subrack along the guide rails from the back of the cabinet. The other twopersons hold the subrack by the mounting ears and remove the subrack from the cabinet.

Step 8 Two persons hold the mounting ears and the bottom of the new subrack from the front of thecabinet. Then, install the subrack into the cabinet along the guide rails. Then, fix the captivescrews to secure the subrack.

Step 9 Set the DIP switch of the new subrack according to the settings of the DIP switch of the subrackto be replaced. For details, see 10.1 DIP Switch on the Subrack.

Step 10 Connect the power cable, grounding cable, and PGND cable to the new subrack.

Step 11 Turn on the power switches controlling the subrack on the power distribution box.

Step 12 Insert the boards into the subrack by referring to the records in Step 2 and 7.2.2 Inserting aBoard.

NOTE

If the subrack to be replaced is the MPS, insert the OMUa board first to power on and load the configurationdata to the OMUa board.

Step 13 Connect cables to the subrack by referring to 8 Replacing the Cables.



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Step 14 Carry out a load commissioning and a service commissioning.For detailed procedures, see the BSC6900 GSM Commissioning Guide.

Step 15 Check whether alarms related to subrack failure such as Cell Setup Failure are cleared after theBSC6900 subrack is replaced. Clear these alarms by referring to the alarm online help on theLMT. If the faults persist, contact Huawei for technical support.

----End

Follow-up ProcedureContact the local Huawei office to handle the faulty subrack.

7.19 Replacing the Independent Fan SubrackWhen the independent fan subrack in the BSC6900 is faulty, the independent fan subrack mustbe replaced. It takes about 15 minutes to replace an independent fan subrack.


screwdriver, diagonal pliers, dustfree cotton cloth, and fiber cleaner.

l A new independent fan subrack is ready.

Context


Procedure

Step 1 Check whether the labels on the cables that are connected to the independent fan subrack arelegible. If the labels are illegible, attach a new label to the cables to avoid wrong connectionafter replacing the independent fan subrack.

Step 2 Turn off the power switches that control the independent fan subrack to be replaced.

NOTE

For distribution of the BSC6900 power switches, see the labels on the front panel of the power distributionbox. For details, see 4.2 Distribution of Power Switches on the High-Power PDB.

Step 3 Remove the cables connected to the independent fan subrack by referring to 8 Replacing theCables.

Step 4 Remove the four captive screws that fix the independent fan subrack from the front of the cabinetand reserve them for future use.




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Step 5 Hold the independent fan subrack by the mounting ears and remove the independent fan subrackfrom the cabinet.

Step 6 Hold the mounting ears and the bottom of the new independent fan subrack from the front ofthe cabinet. Then, install the independent fan subrack into the cabinet along the guide rails. Then,fix the captive screws to secure the independent fan subrack.

Step 7 Connect the power cable, monitoring signal cable, and PGND cable to the new independent fansubrack.

Step 8 Turn on the power switches that control the independent fan subrack on the power distributionbox.

Step 9 Perform service commissioning.For detailed procedures, see the BSC6900 GSM Commissioning Guide.

Step 10 After replacing the independent fan subrack in the BSC6900 cabinet, check whether the alarmsrelated to the independent fan subrack are cleared. If these alarms persist, clear them by referringto the alarm online help on the LMT. If these alarms still persist, contact Huawei for technicalsupport.

----End

Follow-up ProcedureContact the local Huawei office to dispose of the replaced independent fan subrack.

7.20 Replacing the Power Distribution BoxThis section describes how to replace a faulty power distribution box. It takes about 25 minutesto replace a power distribution box.

Prerequisitel The tools are ready. They are ESD wrist strap, Phillips screwdriver, cable ties, diagonal

pliers, insulation tapes, and sticky label papers.l The new power distribution box is configured according to actual requirements on site.

Context




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CAUTIONl Replacing the power distribution box in the EPR/TCR disrupts all the services carried by the

EPR/TCR.l Replacing the power distribution box in the MPR disrupts all the services carried by the entire

BSC6900.

There are two types of power distribution boxes for the BSC6900, and they are different in termsof the rear panel.

Figure 7-13 shows the rear panel of the common power distribution box.

Figure 7-13 Rear panel of the common power distribution box

1 Power input terminals 2 Power output terminals 3 COM3: Port connecting the power distribution box and aservice subrack

The installation positions for the -48 V power cable and RTN power cable are labeled -48V andRTN on the power input terminal block and power output terminal block.

Figure 7-14 shows the rear panel of the high-power distribution box.




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Figure 7-14 Rear panel of the high-power distribution box

1 Power input terminals 2 Power output terminals3 Port connecting the power distribution box and a service subrack 4 2-hole grounding screw

l On the power input terminal, the installation positions for the -48 V power cables are labeled3(-), 2(-), and 1(-), and the installation positions for the RTN power cables are labeled 3(+), 2(+), and 1(+).

l The installation positions for the -48 V power cables and RTN power cables are labeledNEG(-) and RTN(+) on the power output terminal of the power distribution box.

Procedurel Replace a common power distribution box.

1. Record the state of each power switch on the power distribution box. Set all theswitches to OFF.

2. Set the power switches that control the BSC power supply on the DC PDF to OFF.

CAUTIONAfter powering off the cabinet, wait for five minutes, and then replace the powerdistribution box.

3. Remove the cables from the common power distribution box. Figure 7-13 shows thecables connected to the panel of the common power distribution box.

– Check the engineering labels on the power input cables, as shown in 1 of Figure7-13. If the label is not legible, attach a temporary label and fill in the position ofthe cable. Then, remove the power cables.

– Check the engineering labels on the power output cables, as shown in 2 of Figure7-13. If the label is not legible, attach a temporary label and fill in the position ofthe cable. Then, remove the power cables.

– Remove the signal monitoring cable that is connected to the port shown in 3 ofFigure 7-13.

– Remove the PGND cable that is connected to the busbar of the cabinet from thepower distribution box.



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4. Remove the four screws from the front hanger of the power distribution box. Keepthe screws properly for future use.

5. Remove the screws on the front panel of the power distribution box by using the M3Phillips screwdriver.

6. Hold the handle of the power distribution box and take it out of the cabinet.7. Insert the new box into the cabinet.8. Fasten the four screws to the front hanger of the power distribution box. Fasten the

screws to the front panel of the power distribution box.9. Connect the cables to the power distribution box.

– Connect the PGND cable to the power distribution box.

– Connect the power input cable by referring to the engineering label or temporarylabel. Then, stick a new engineering label to the cable.

– Connect the power output cable by referring to the engineering label or temporarylabel. Then, stick a new engineering label to the cable.

– Connect the signal monitoring cable to the power distribution box.10. Ensure that all the power cables are correctly connected.11. Set the power switch that controls the power supply of the power distribution box on

the PDF to ON.12. Set the switches on the power distribution box to ON by referring to the records in

Step 1.13. After replacing the power distribution box, check the items in Table 7-3.

Table 7-3 Checklist for the new power distribution box

Item Result Action

LEDs on the panelshow the normal statusof the powerdistribution box. Fordetails about the LEDs,refer to LEDs on theMDMC Panel.

Yes Check the next item.

No 1. Check whether the powerinput cables are correctlyconnected. If the powerinput cables are incorrectlyconnected, reconnect thecables.

2. If faults persist, contactHuawei for technicalsupport.

Alarms related to thepower distribution boxfailure are cleared.


No 1. Clear the alarms byreferring to the alarmonline help on the LMT.

2. If the alarms persist,contact Huawei fortechnical support.

The power distributionbox supplies power to

Yes End the check.




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Item Result Action

all the components inthe cabinet.

No 1. Check whether the poweroutput cables are correctlyconnected. If the poweroutput cables areincorrectly connected, turnoff all the power switcheson the power distributionbox and the powerswitches that controlpower supply of thecabinet on the PDF. Thenreconnect the cables.


NOTE

After powering on the cabinet, check the power supply to the internal components and handleproblems accordingly.

l Replace a high-power distribution box.

1. Record the state of each power switch on the power distribution box. Set all the powerswitches to OFF.

2. Set the power switches that control the BSC power supply on the DC PDF to OFF.

CAUTIONAfter powering off the cabinet, wait for five minutes, and then replace the powerdistribution box.

3. Loosen the screws on the rear transparent plastic filler panel of the power distributionbox by using the M3 Phillips screwdriver. Then, remove the plastic filler panel.

4. Remove the cables from the power distribution box. Figure 7-14 shows the cablesconnected to the panel of the high-power distribution box.

– Check the engineering labels on the power input cables, as shown in 1 of Figure7-14. If the label is not legible, attach a temporary label and fill in the position ofthe cable. Then, remove the power cables.

– Check the engineering labels on the power output cables, as shown in 2 of Figure7-14. If the label is not legible, attach a temporary label and fill in the position ofthe cable. Then, remove the power cables.

– Remove the signal monitoring cable that is connected to the port shown in 3 ofFigure 7-14.

– Remove the PGND cable that is connected to the busbar of the cabinet from thepower distribution box.



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5. Remove the four screws from the hanger of the power distribution box. Keep thescrews properly for future use.

6. Remove the screws on the front panel of the power distribution box by using the M3Phillips screwdriver. Then, remove the MCBs and filler panels from the powerdistribution box. Keep the components for future use.

7. Hold the handle of the power distribution box and take it out of the cabinet.8. Loosen the six screws on the front plastic panel of the new power distribution box by

using the M3 Phillips screwdriver. Then, remove the plastic panel.9. Install the MCBs in the new power distribution box. Note the installation positions.10. Install the filler panels at the positions where MCBs are not installed in the new power

distribution box.11. Install the plastic panel of the new power distribution box, install the power

distribution box on the top of the cabinet, and then fasten the four screws on the fronthanger of the power distribution box.

12. Connect the cables to the power distribution box.– Connect the PGND cable to the power distribution box.– Connect the power input cable by referring to the engineering label or temporary

label. Then, stick a new engineering label to the cable.– Connect the power output cable by referring to the engineering label or temporary

label. Then, stick a new engineering label to the cable.– Connect the signal monitoring cable to the power distribution box.

13. Ensure that all the power cables are correctly connected.14. Set the power switch that controls the power supply of the power distribution box on

the PDF to ON15. Set the power switches on the power distribution box to ON by referring to the records

in Step 1.16. Install the transparent plastic filler panel at the rear of the power distribution box.17. After replacing the power distribution box, check the items in Table 7-4.

Table 7-4 Checklist for the new power distribution box

Item Result Action

LEDs on the panelshow the normal statusof the powerdistribution box. Fordetails about the LEDs,refer to 9.13 LEDs onthe PAMU Board.


No 1. Check whether the powerinput cables are correctlyconnected. If the powerinput cables are incorrectlyconnected, reconnect thecables.


Alarms related to thepower distribution boxfailure are cleared.





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Item Result Action



The power distributionbox supplies power toall the components inthe cabinet.

Yes End the check.

No 1. Check whether the poweroutput cables are correctlyconnected. If the poweroutput cables areincorrectly connected, turnoff all the power switcheson the power distributionbox and the powerswitches that controlpower supply of thecabinet on the PDF. Thenreconnect the cables.

2. If the faults persist, contactHuawei for technicalsupport.

NOTE

After powering on the cabinet, check the power supply to the internal components and handleproblems accordingly.

----End

Follow-up ProcedureContact the local Huawei office to handle the faulty power distribution box.

7.21 Replacing the Fan BoxWhen a fan box in the service subrack or in the independent fan subrack is faulty, the fan boxmust be replaced. You should finish the replacement of the fan box in less than one minute.

Prerequisitel The tools are ready. The tools are the ESD wrist strap, Phillips screwdriver, and flat-head

screwdriver.l The backup fan box is clean.



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Context


CAUTIONReplacing the fan box severely affects the heat dissipation; therefore, you are advised to replacethe fan box within one minute. Otherwise, the boards may be damaged due to high temperature.

ProcedureStep 1 Set the DIP switch on the PFCU or the jumper pins on the PFCB according to the installation

position and actual configuration of the fan box.l If the fan box is located in the service subrack and the PFCU board is configured, set the DIP

switch on the PFCU board (as shown in Figure 7-15) in the new fan box according to Table7-5.

Figure 7-15 DIP switch on the PFCU

Table 7-5 Setting of the DIP switch on the PFCU

DIP Switch DIP Bit Switch Status Description

SW1 1 (the least significantbit)

OFF 1

2 ON 0

3 ON 0

4 (the most significantbit)

ON 0

l If the fan box is located in the independent fan subrack and the PFCU board is configured,

set the DIP switch on the PFCU board (as shown in Figure 7-16) in the new fan box accordingto Table 7-6.




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Figure 7-16 DIP switch on the PFCU

Table 7-6 Setting of the DIP switch on the PFCU

DIP Switch DIP Bit Switch Status Description


ON 0

2 ON 0

3 OFF 1


ON 0

l If the fan box is located in the service subrack and the PFCB board is configured, set the

jumper pins on the PFCB board (as shown in Figure 7-17) in the new fan box according toTable 7-7

Figure 7-17 Jumper pins on the PFCB

Table 7-7 Setting of the jumper pins on the PFCB

PinNumber

1-2 3-4 5-6 7-8 9-10 11-12 13-14 15-16

Connected tojumper

NO NO NO NO YES NO NO NO

l If the fan box is located in the independent fan subrack and the PFCB board is configured,

set the jumper pins on the PFCB board (as shown in Figure 7-18) in the new fan box accordingto Table 7-8.



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Figure 7-18 Jumper pins on the PFCB

Table 7-8 Setting of the jumper pins on the PFCB

PinNumber

1-2 3-4 5-6 7-8 9-10 11-12 13-14 15-16

Connected tojumper

NO NO NO NO NO NO YES NO

Step 2 Loosen the captive screws from the panel of the fan box.

Step 3 Remove the fan box along the guide rails, as shown in Figure 7-19. When the fan box is almostout of the cabinet, hold the bottom of the fan box with one hand and the handle with the otheruntil the fan box is removed from the cabinet.

CAUTIONWhen replacing the fan box, do not put your hand inside the fan box. Otherwise, the revolvingblade may injure your fingers.




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Figure 7-19 Removing the fan box

1 Handle 2 Screw 3 LED

Step 4 Reserve the replaced fan box for later handling.

Step 5 Insert the new fan box into the subrack along the guide rails by holding the bottom of the fanbox with one hand and the handle with the other hand. Then, push the fan box by holding twohandles on the fan box along the guide rails until the fan starts to work.

Step 6 Secure the captive screws on the panel.

Step 7 After replacing the fan box, check the items in Table 7-9.

Table 7-9 Checklist for replacing the fan box

Item Result Action

Whether the LEDs on the panelshow that the fan box is in normalstate. For details on the LEDs,refer to the following section:Fan Box (Configured with thePFCU Board) if PFCU isconfigured or Fan Box(Configured with the PFCBBoard) if PFCB is configured.


No 1. Pull out the fan boxslightly. Then, adjustthe fan box position andpush the fan box back inposition.

2. If the alarm box is stillabnormal, contactHuawei CustomerService Center.

Whether the alarms caused bythe faulty fan box are cleared.

Yes End the check.



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Item Result Action


2. If the alarms persist,contact HuaweiCustomer ServiceCenter.

Step 8 Clean the replaced fan box, and then put it in an ESD box or bag.

----End

Follow-up ProcedureContact the local Huawei office to handle the replaced fan box.

7.22 Replacing the Pluggable Optical ModuleThis section describes how to replace a pluggable optical module when the module is faulty.

Prerequisitel The tools are ready. The tools are the ESD wrist strap, the ESD box or bag, and the diagonal

pliers.l A new optical module is ready.

Context


In short-distance transmission, the multi-mode optical module is used with the multi-modefibers. The effective transmission distance is 2 km. In long-distance transmission, the single-mode optical module is used with the single-mode fibers. The effective transmission distancecan be 15 km, 40 km, or 80 km. Generally, the single-mode optical module with the effectivetransmission distance of 15 km is used. The BSC6900 and its peer equipment must use the sametype of the optical module, which mainly features the mode and wavelength.

Table 7-10 lists the related parameters of the optical modules.




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Table 7-10 Parameters of optical modules

OpticalModuleType

OperatingWavelength

TransmissionRate

Max./Min. OutputOptical Power

OpticalConnectorType

FunctionalTransmissionDistance

Multimode opticalmodule

1,310 nm STM1

-14.0/-19.0 dBm LC (TX disable) 2 km

Single-modeopticalmodule

1,310 nm STM1

-8.0/-15.0 dBm LC (dedicated) 15 km

NOTE

l Replacing the hot-swappable optical module on the standby optical interface board does not have anegative effect on the system.

l If there is no standby board in position, replacing the hot-swappable optical module on the active opticalinterface board disrupts all the services carried on the board.

Procedure

Step 1 Remove the optical cable from the optical port.

Step 2 After removing the optical cable, use a protective cap to cover the optical connector.

Step 3 Unlock the bayonet, as shown in part 1 of Figure 7-20. Remove the optical module, as shownin part 2 of Figure 7-20.

Figure 7-20 Replacing an optical module



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Step 4 Put the removed optical module into an ESD bag.

Step 5 Insert the new optical module into the socket on the optical interface board. Ensure that thebayonet lock is secure.

Step 6 Connect the optical cable to the optical port. Ensure that the TX and RX ends of the optical cableare connected correctly. You can hear a click sound when the optical cable is securely connected.

Step 7 Check whether the alarm related to the optical module is cleared.

NOTE

An alarm is generated when the optical module is removed. The alarm is cleared when the optical moduleis reinstalled.

----End

Follow-up ProcedureContact the local Huawei office to handle the replaced optical module.

7.23 Replacing an Optical Splitter/CombinerThis section describes how to replace an optical splitter/combiner. The BSC6900 opticalsplitters/combiners are LC/LC-LC single-mode optical splitter/combiner and LC/LC-LC multi-mode optical splitter/combiner. It takes about five minutes to replace an optical splitter/combiner.

Prerequisitel The following tools are ready: the ESD wrist strap, dustfree cotton cloth, fiber cleaner, and

diagonal pliers.l The following materials are ready: cable ties and permanent labels.l A new optical splitter/combiner is ready.l The number and type of optical splitters/combiners to be replaced are clear.

Context





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CAUTIONl When replacing the optical splitter/combiner, do not look into the optical port without eye

protection.l Replacing an optical splitter/combiner disrupts ongoing services on the corresponding

interface boards. Therefore, replace it in low traffic hours, for example, at midnight.

Procedure

Step 1 Attach temporary labels to the new optical splitter/combiner for easy identification. It isrecommended that content of the temporary labels be identical with the labels on the old opticalsplitter/combiner.

Step 2 Put the new optical splitter/combiner aside the old optical splitter/combiner.

Step 3 Disconnect the optical fiber by pressing the tab on the optical connector. Then, remove the opticalsplitter/combiner to be replaced.

Step 4 Install the new optical splitter/combiner by referring to Installing the Optical Splitter/Combiner.

CAUTIONThe TX end and RX end of the new optical splitter/combiner must be correctly connected.Otherwise, optical signals cannot be received or transmitted.

Step 5 Replace the temporary labels on the new optical splitter/combiner with the engineering labels.The content of the engineering labels must be identical with that of the temporary labels. Fordetails, see Attaching an Engineering Label to a Signal Cable.

Step 6 Bind the optical splitters/combiners.

Step 7 Check the items listed in Table 7-11.

Table 7-11 Checklist for monitoring optical splitter/combiner replacement

Item Result Action

Connection of theoptical fiber iscorrect.


No Remove the optical fiber and reconnect it.

Optical connectorsare properly insertedinto the relatedports.


No Secure the optical connectors.

Alarms related to thetransmission cableare cleared.

Yes No further action is required.

NoClear the alarms by referring to the alarm onlinehelp on the LMT. If the alarms persist, contactHuawei for technical support.



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----End

Follow-up ProcedureDispose of the replaced optical splitter/combiner to prevent environmental pollution.

7.24 Replacing the KVMThis section describes how to replace a faulty KVM. It takes about 10 minutes to replace a KVM.

Prerequisitel The tools are ready. They are the ESD wrist strap, Phillips screwdriver, and flat-head

screwdriver.l The new KVM is configured according to actual requirements on site.

Context


connector of the cabinet before replacing a KVM. Wear a pair of ESD gloves instead if thereis no ESD wrist strap or there is no ESD connector for the ESD wrist strap.

l When replacing the KVM, one cannot operate the GBAM through the GUI.

Procedure

Step 1 Check whether the labels on the cables connected to the KVM are legible. If the labels are notlegible, attach new labels to the cables to avoid improper connection after the KVM is replaced.

Step 2 Turn off the power switch on the rear panel of the KVM.

Step 3 Turn off the power switch that controls power supply to the KVM. Figure 7-21 shows the powerswitches on the power distribution box in the MPR.




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Figure 7-21 Distribution of the power switches in the MPR

Step 4 Remove the cables that are connected to the KVM to be replaced.

Step 5 Remove the rear hangers from the KVM.

Step 6 Remove the screws that fix the front hangers of the KVM to the rack. Then, remove the KVMfrom the cabinet along the guide rails.

Step 7 Place the new KVM in the original position. Then, secure the screws.

Step 8 Install the rear hangers on the new KVM, and then secure the screws that fix the rear hangers tothe rack.

Step 9 Connect the cables to the new KVM.

Step 10 Turn on the power switch that controls power supply to the KVM.

Figure 7-21 shows the power switches on the power distribution box in the MPR.

Step 11 Turn on the power switch on the rear panel of the KVM.

Step 12 Check whether the KVM works normally. If the KVM does not work normally, clear the alarmsby referring to the alarm online help on the LMT. If the alarms persist, contact Huawei fortechnical support.

----End

Follow-up ProcedureContact the local Huawei office to handle the faulty KVM.



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7.25 Replacing the LAN SwitchThis section describes how to replace a faulty LAN switch. It takes about 10 minutes to replacea LAN switch.

Prerequisitel The tools are ready. They are the ESD wrist strap, Phillips screwdriver, and flat-head

screwdriver.l The new LAN switch is configured according to actual requirements on site.

Context


connector of the cabinet before replacing a LAN switch. Wear a pair of ESD gloves insteadif there is no ESD wrist strap or there is no ESD connector for the ESD wrist strap.

l Replacing the LAN switch disrupts the communication between the LMT/M2000 and theGBAM.

Procedure

Step 1 Check whether the labels on the Ethernet cables connected to the LAN switch are legible. If thelabels are not legible, attach new labels to the cables to avoid improper connection after the LANswitch is replaced.

Step 2 Turn off power switch SW3 that controls the power supply to the LAN switch to be replaced.For details on power switches on the power distribution box, see 4.1 Distribution of PowerSwitches on the Common Power Distribution Box.

Step 3 Remove the PGND cable and Ethernet cables that are connected to the LAN switch to bereplaced.

Step 4 Remove the screws fixing the LAN switch to the rack.

Step 5 Remove the LAN switch from the cabinet along the guide rails. Remove the power cable that isconnected to the rear of the LAN switch.

Step 6 Connect the power cable to the rear of the new LAN switch.

Step 7 Place the new LAN switch in the original position. Then, secure the screws.

Step 8 Connect the PGND cable and Ethernet cables to the LAN switch.

Step 9 Turn on power switch that controls the power supply to the LAN switch. For details on powerswitches on the power distribution box, see 4.1 Distribution of Power Switches on theCommon Power Distribution Box.

Step 10 Check the items in Table 7-12.




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Table 7-12 Checklist for LAN switch replacement

Item Result Action

Whether the LEDs on the panel of the LANswitch show that the LAN switch is innormal state. For details on the LEDs, seeLAN Switch.


No Rectify the fault byreferring to the usermanual of the LANswitch.

Whether the alarms caused by the faultyLAN switch are cleared.


No 1. Clear the alarms byreferring to thealarm online helpon the LMT.

2. If the alarmspersist, contactHuawei fortechnical support.

Whether the communication between theLAN switch and other computers on thesame network segment is normal Whetherthe communication between the LANswitch and other computers on the samenetwork segment is normal by running thePing command.

Yes End the check.

No Check whether thesetting of the LANswitch is correct.l If the setting of the

LAN switch isincorrect, modifythe setting.

l If the setting of theLAN switch iscorrect, check theconnection of theEthernet cables.

----End

Follow-up ProcedureContact the local Huawei office to handle the faulty LAN switch.

7.26 Replacing the GBAMThis section describes how to replace a faulty GBAM. It takes about 40 minutes to replace aGBAM. There are three models of GBAM, namely, IBM X3650T, C5210, and HP CC3310.

Prerequisitel The tools are ready. They are the ESD wrist strap, Phillips screwdriver, straight screwdriver,

and ESD boxes or bags.



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l A new GBAM is ready.

CAUTIONl When configuring the new GBAM or OMU board, ensure that the following parameter

settings are consistent with those of the GBAM to be replaced: server name or computername, OS administrator password, admin password, and IP address.

l If you change the IP address of the GBAM, you need to reset the alarm box manually.

Context




CAUTIONl Replacing the GBAM disrupts the communication between the GBAM and the host boards.l Replacing the GBAM disrupts the communication between the LMT/M2000 and the

BSC6900. In this case, you cannot maintain the BSC6900 or collect the alarm information.The BSC6900 host boards, however, work normally during the replacement of the GBAM.

Procedurel Replace the GBAM with a new GBAM.

1. Log in to the GBAM as user root, and then run the Linux OS command /etc/rc.d/omud stop to stop all applications on the GBAM to be replaced.

2. Run the Linux OS command poweroff to shut down the GBAM to be replaced.3. Turn off SW3 and SW6 on the power distribution box that control the power supply

to the GBAM to be replaced. Figure 7-22 shows the labels for the power switches onthe front panel of the power distribution box.




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Figure 7-22 Front panel of the power distribution box

1 Panel of the MDMC 2 RUN LED 3 ALM LED 4 Mute switch5 Labels of power switches 6 Power switches 7 Panel of the WOPB board

4. Check whether the labels on the cables that are connected to the GBAM to be replaced

are legible. If the labels are not legible, attach a new label to the cables to avoidimproper connection after replacing the GBAM.

5. Remove the power cable, PGND cable, and Ethernet cables from the GBAM to bereplaced.

6. Remove the screws fixing the GBAM to the rack.7. Remove the hangers from the GBAM to be replaced, and then install the hangers on

the new GBAM.8. Remove the GBAM from the cabinet along the guide rails.9. Place the new GBAM in the original position. Then, secure the screws.10. Connect the power cable, PGND cable, and Ethernet cables to the new GBAM.11. Turn on the power switch controlling the power supply to the GBAM on the power

distribution box. For distribution of the power switches, see labels on the front panelof the power distribution box, as shown in Figure 7-22.

12. Turn on the power switch on the front panel of the new GBAM.13. Check the items in Table 7-13.

Table 7-13 Checklist for GBAM replacement

Item Result Action

Whether the LEDs on thepanel show that the GBAM isin normal state. For details onthe LEDs, see Front Panel ofthe GBAM (IBM X3650T),Front Panel of the GBAM(HUAWEI C5210), and FrontPanel of the GBAM (HPCC3310).


No Rectify the fault byreferring to the usermanual of the GBAM.

Alarms related to the failure ofthe GBAM are cleared.




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Item Result Action

No 1. Clear the alarms byreferring to thealarm online help onthe LMT.


Run the Ping command tocheck whether thecommunication between theGBAM and other computerson the same network segmentis normal.


No 1. Check whether theroute setting iscorrect. If the routesetting is incorrect,modify the routesetting.

2. If the route setting iscorrect, check theconnection of theEthernet cables.

Check whether the processesare normal.

Yes End the check.

No Restart the abnormalprocesses. If theproblem persists,contact Huawei fortechnical support.

l Replace the GBAM with an OMUa board.

CAUTIONl Do not perform any operations that will modify the configuration data or the attributes

when replacing the GBAM.l Get a PC ready for file backup during the GBAM replacement.

1. The OMU board can be installed in slots 0 to 3, 20 to 23, or 24 to 27 in the MPS. Whenreplacing the GBAM with the OMU board, first log in the OMU and run the LSTBRD command to check whether there is an idle slot for the OMU board. If there isno idle slot for the OMU board, first modify the configuration data.

2. Collect the required information.

(1) Run the DSP OMU command to obtain the computer name and external fixedIP address of the GBAM.




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NOTEIf the external fixed IP address is not configured, its value is displayed as null. In this case,one must apply for an IP address that is in the same network segment as the external virtualIP address and use it as the external fixed IP address.

(2) Run the LST VER command to obtain the version information about the GBAM.(3) Run the Linux OS command route to obtain the external mask and gateway IP

address of the GBAM.(4) Run the Linux OS command ps -afx to obtain the common directory and active

workspace directory of the OMU.3. Obtain the version software based on the version information obtained in step 2.2.4. Back up the data on the GBAM.

(1) Create a backup directory on the hard disk that has at least 1 GB free space onthe PC. The backup directory is used to back up the data on the GBAM. Then,create subdirectories common, data, license, DefaultMeas, cert, and bin underthe backup directory.

(2) Back up the reg.ini file in the common directory of the OMU to the backup/common directory of the PC.

(3) Run the BKP DB command to back up the OMU databases. The backupdatabases are stored in /data/backup of the OMU active workspace directory.Then, back up the files in /data/backup of the OMU active workspace directoryto the backup/data directory of the PC.

(4) Back up the license files in the license of the OMU active workspace directoryto the backup/license directory of the PC.

(5) Back up the performance task files in /ftp/DefaultMeas of the OMU activeworkspace directory to the backup/DefaultMeas directory of the PC.

(6) Back up the certificate files in /ftp/cert of the OMU active workspace directoryto the backup/cert directory of the PC.

(7) Back up the bin directory. To back up the bin directory, first run the Linux OScommand tar czvf bin.tgz bin/ in the OMU active workspace directory tocompress the bin directory. Then, back up the compressed bin.tgz file to thebackup/bin directory of the PC.

5. Shut down the GBAM to be replaced.

(1) Log in to the GBAM as user root, and then run the Linux OS command /etc/rc.d/omud stop to stop all applications on the GBAM to be replaced.

(2) Run the Linux OS command poweroff to shut down the GBAM to be replaced.(3) Turn off SW3 and SW6 on the power distribution box that control the power

supply to the GBAM to be replaced. Figure 7-22 shows the labels for the powerswitches on the front panel of the power distribution box.

6. Remove the GBAM.

(1) Remove the power cable, PGND cable, and Ethernet cables from the GBAM tobe replaced.

(2) Remove the screws fixing the GBAM to the rack. Then, remove the hangers fromthe GBAM to be replaced.

(3) Remove the GBAM from the cabinet along the guide rails.7. Installing the OMUa Boards8. Installing the OMU Applications in the Active Workspace



7-89

9. Modify the external fixed IP address, mask, gateway IP address, and computer nameof the OMU by using the omutool. For details, see Changing the IP Addresses andMasks of the OMU Ethernet Adapters and Changing the OMU Name.

10. Recover the data.

(1) Recover the reg.ini file by first deleting the reg.ini file in the /mbsc/bam/common/ directory of the OMU and then uploading the reg.ini file in the backup/common directory of the PC to the /mbsc/bam/common/ directory of the OMU.

(2) Recover the license files by uploading the license files in the backup/licensedirectory of the PC to the /mbsc/bam/version_a/license directory of the OMU.

(3) Recover the performance task files by uploading the files in the backup/DefaultMeas directory of the PC to the /mbsc/bam/version_a/ftp/DefaultMeas directory of the OMU.

(4) Recover the license files by uploading the files in the backup/cert directory ofthe PC to the /mbsc/bam/version_a/ftp/cert directory of the OMU.

(5) Recover the bin directory.– Run the Linux OS command mv /mbsc/bam/version_a/bin /mbsc/bam/

version_a/binbak to change the name of the bin directory in the /mbsc/bam/version_a directory to binbak.

– Upload the bin.tgz file in the backup/bin directory of the PC to the /mbsc/bam/version_a directory of the OMU.

– Run the Linux OS command tar xzvf bin.tgz to decompress the bin directory.– Run the Linux OS command rm -fr /mbsc/bam/version_a/binbak to delete

the binbak directory.(6) Recover the OMU databases.

– Upload the files in the backup/data directory of the PC to the OMU.– Recover the OMU data by using the omu_backup_linker tool. For details, see

Restoring the System Data.11. Run the Linux OS command /etc/rc.d/omud start to start the OMU services.12. Log in the OMU and run the DSP OMU command to check the status and IP addresses

of the new board.13. Run the DSP OMUMODULE command to check the status of OMU services.14. Run the DSP BRD command to query the status of the OMU board.15. After the OMU board works normally, run the ADD BRD command to add the

configuration data of the OMU board.16. Run the SET SCUPORT command to disable ports 10 and 11 on the SCUa board in

subrack 0.

----End




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8 Replacing the Cables

About This Chapter

This chapter describes how to replace the Ethernet cable, E1/T1 cable, optical cable, clock signalcable, cable to the alarm box, and power distribution box monitoring cable. This chapter alsodescribes how to check that the cables are successfully replaced and how to handle the faultycables.

ContextThe requirements of installing the signal cables see the Principles of Installing the Signal Cables.

8.1 Replacing a Power CableThis section describes how to replace a power cable. It takes about 10 minutes to replace a powercable in overhead mode and about 30 minutes to replace a power cable in underfloor mode.

8.2 Replacing an E1/T1 CableThis section describes how to replace an E1/T1 cable of the BSC6900. The cable consists of theY-shaped 75-ohm coaxial cable and Y-shaped 120-ohm twisted pair cable. It takes about 10minutes to replace an E1/T1 cable.

8.3 Replacing an Optical CableThis section describes how to replace an optical cable. The BSC6900 optical cables are LC/PC-SC/PC single mode optical cable, LC/PC-SC/PC multi-mode optical cable, LC/PC-FC/PC singlemode optical cable, LC/PC-FC/PC multi-mode optical cable, LC/PC-LC/PC single mode opticalcable, and LC/PC-LC/PC multi-mode optical cable. It takes about five minutes to replace thecable.

8.4 Replacing an Ethernet CableThis section describes how to replace an Ethernet cable. It takes 5 to 20 minutes to replace anEthernet cable.

8.5 Replacing a Clock Signal CableThis section describes how to replace a clock signal cable. It takes five to twenty minutes toreplace a clock signal cable depending on the installation position of the reference clock.

8.6 Replacing a Y-Shaped Clock CableThis section describes how to replace a Y-shaped clock cable. It takes about 5 to 20 minutes toreplace a Y-shaped clock cable, depending on the installation position of the Y-shaped clockcable.

BSC6900 GSMSite Maintenance Guide 8 Replacing the Cables


8-1

8.7 Replacing an Inter-TNUa CableThis section describes how to replace an inter-TNUa cable. It takes five to twenty minutes toreplace an inter-TNUa cable depending on the installation position.

8.8 Replacing an EMU RS485 Communication CableThis section describes how to replace the RS485 communication cable. It takes about fiveminutes to replace the RS485 communication cable.

8.9 Replacing a Signal Cable to the Alarm BoxThis section describes how to replace a signal cable connected to the alarm box. It takes five totwenty minutes to replace a signal cable depending on the installation position of the alarm box.

8.10 Replacing the Monitoring Signal Cable for the Power Distribution BoxThis section describes how to replace a monitoring cable of the power distribution box. It takesabout 10 minutes to replace a monitoring cable.

8.11 Replacing the Monitoring Signal Cable for the Independent Fan SubrackThis section describes how to replace a monitoring signal cable for the independent fan subrack.It takes about 10 minutes to replace a monitoring signal cable for the independent fan subrack.

8 Replacing the CablesBSC6900 GSM



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8.1 Replacing a Power CableThis section describes how to replace a power cable. It takes about 10 minutes to replace a powercable in overhead mode and about 30 minutes to replace a power cable in underfloor mode.

Prerequisitel The tools are ready. The tools are the diagonal pliers, wrench, medium-size flat-head

screwdriver, large-size Phillips screwdriver, and socket wrench.l The required materials are ready, including cable ties or wax strings.l The backup power cable is ready.

Context



l Replacing the power cable between the PDF and the power distribution box may affect thesystem operation. If the single-input external power is supplied, the replacement causes thesystem to power off, thus disrupting the services carried on the system. If the dual-inputexternal power is supplied, the replacement does not affect the system operation, but triggersa power failure alarm.

l Replacing the power cable between the power distribution box and the subrack may affectthe system operation. If the single-input power is supplied, the replacement causes thesubrack to power off, thus disrupting the services of the subrack. If the dual-input power issupplied, the replacement does not affect the system operation.

l Replacing the power cable between the power distribution box and the independent fansubrack may affect the system operation. If the single-input power is supplied, thereplacement causes the independent fan subrack to power off, thus disrupting the services ofthe independent fan subrack. If the dual-input power is supplied, the replacement does notaffect the system operation.

l Before replacing a power cable, check the power supply mode (for example, single input ordual input) of the power cable. In the case of single input, be well prepared for the possibleservice interruption.

Lay power cables or install power cables by referring to Installing the Power Cables and PGNDCables.

Procedure

Step 1 Check the quantity, length, and type of the -48 V power cables and GND cables to be replaced.Ensure that the backup -48 V cables and GND cables are of the proper length and type. Ensurethat the power cable connectors are available.



8-3

Step 2 Attach temporary labels to the backup -48 V power cable and GND cable for easy identification.

The content on the temporary label should be consistent with the content on the engineeringlabel of the power cable to be replaced.

Step 3 Set switches SW1 to SW6, as described in Table 8-1.

Table 8-1 Setting switches SW1 to SW6

Type of Power Cableto Be Replaced

External Power SupplyMode

Operation

Power cable betweenthe PDF and the powerdistribution box

Single input Record the states of the switchesfor power output and turn off allthe switches that are ON.

Dual input/double dual inputs Record the states of the switchesfor power output and turn off theswitch that controls the -48 Vpower cable to be replaced.

Power cable betweenthe power distributionbox and the subrack

Single input/dual input Record the states of the switchesfor power output and turn off theswitch that controls the -48 Vpower cable to be replaced.

Power cable betweenthe power distributionbox and the independentfan subrack

Single input/dual input Record the states of the switchesfor power output and turn off theswitch that controls the -48 Vpower cable to be replaced.

Step 4 To replace the power cable between the PDF and the power distribution box, set the switch onthe DC PDF that controls the power supply of the cabinet to OFF, and then disconnect the inputpower of the power distribution box. To replace the power cable between the power distributionbox and the subrack/independent fan subrack, skip this step.

Step 5 Remove the original -48 V power cable and GND cable, and lay out the backup -48 V powercable and GND cable.

Step 6 Connect the backup -48 V power cable and GND cable to the corresponding ports.

Step 7 Replace the temporary labels on the backup -48 V power cable and GND cable with theengineering labels.

The content on the engineering label of the backup -48 V power cable and GND cable must beconsistent with the content on the engineering label of the original -48 V power cable and GNDcable. For details, see Attaching an Engineering Label to a Signal Cable.

Step 8 Bind the backup -48 V power cable and GND cable.

Step 9 Check whether the backup -48 V power cable and GND cable are correctly connected, and checkwhether a short-circuit occurs in the backup -48 V power cable and GND cable by using amultimeter.

Step 10 Set the switch that controls the power supply of the power distribution box on the PDF to ON.




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Step 11 Set the switches whose original states are ON to ON according to the records in step 3.

Step 12 After replacing the power cable, check the items listed in Table 8-2.

Table 8-2 Checklist for power cable replacement

Item Result Action

Cable connection iscorrect.

Yes Go to the next item.

No Remove the power cable andreconnect it.

The connectors of thepower cable are properlyinserted into the port.


No Secure the connector.

Alarms related to thepower cable are cleared.




----End

Follow-up ProcedureDispose of the replaced power cable properly to prevent short-circuits and environmentalpollution.

8.2 Replacing an E1/T1 CableThis section describes how to replace an E1/T1 cable of the BSC6900. The cable consists of theY-shaped 75-ohm coaxial cable and Y-shaped 120-ohm twisted pair cable. It takes about 10minutes to replace an E1/T1 cable.

Prerequisitel The tools are ready. The tools are the ESD wrist strap, flat-head screwdriver, and diagonal

pliers.l The required materials are ready, including cable ties or wax strings.l A new E1/T1 cable is ready.



8-5

Context


CAUTIONl Replacing the E1/T1 cable disrupts the services carried over the E1/T1 cable.

l If the BSC6900 and its peer end are connected through only the E1/T1 cable, all the servicesbetween the BSC6900 and its peer end are disrupted during the replacement.

Lay E1/T1 cables or install E1/T1 cables by referring to Installing the E1/T1 Cables.

Procedure

Step 1 Confirm the quantity, length, and type of the E1/T1 cables to be replaced. Arrange for a newE1/T1 cable with proper length and type. Note that extra length should be reserved.

Step 2 Add a connector for the DDF to the new E1/T1 cable.

Step 3 Attach temporary labels to the new E1/T1 cable. The content on the temporary label should beconsistent with the content on the original label.

NOTE

To facilitate the routing of E1/T1 cables in real situations, you may have to remove the side doors and reardoor of the cabinet. Install the removed doors after arranging the E1/T1 cables.

Step 4 Lay out the new E1/T1 cable along the original routing, or according to the new routingrequirements on site.

Step 5 On the BSC6900 side, remove the fastening screws on both ends of the E1/T1 cable withoutusing any tools. Then, disconnect the E1/T1 cable to be replaced from the BSC6900 and theDDF respectively.

Step 6 Connect the new E1/T1 cable without using any tools to the original ports on the BSC6900 andthe DDF.

Step 7 Replace the temporary labels on the new cable with the engineering labels.

The content on the engineering label of the new E1/T1 cable must be identical with the contenton the engineering label of the original E1/T1 cable. For details, see Attaching an EngineeringLabel to a Signal Cable.

Step 8 Bind the new E1/T1 cables.

Step 9 After replacing the E1/T1 cable, check the following item listed in Table 8-3.




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Table 8-3 Checklist for E1/T1 cable replacement

Item Result Action



No Remove the E1/T1 cable andreconnect it.

The connectors of theE1/T1 cable areproperly inserted intothe ports.



Alarms related totransmission cable arecleared.

Yes End the check.

No 1. Clear the alarms by referringto the alarm online help onthe LMT.

2. If the alarms persist, contactHuawei for technicalsupport.

----End

Follow-up ProcedureDispose of the replaced E1/T1 cable properly to prevent short circuit and environmentalpollution.

8.3 Replacing an Optical CableThis section describes how to replace an optical cable. The BSC6900 optical cables are LC/PC-SC/PC single mode optical cable, LC/PC-SC/PC multi-mode optical cable, LC/PC-FC/PC singlemode optical cable, LC/PC-FC/PC multi-mode optical cable, LC/PC-LC/PC single mode opticalcable, and LC/PC-LC/PC multi-mode optical cable. It takes about five minutes to replace thecable.

Prerequisitel The tools are ready. The tools are the ESD wrist strap, dustfree cotton cloth, fiber cleaner,

and diagonal pliers.l The materials are ready. The materials are cable ties or wax strings.l A new optical cable is ready.l Confirm the quantity, length, and type of optical cables to be replaced.



8-7

Context


CAUTIONl When replacing the optical cable, invisible laser radiation might be emitted from

disconnected fibers or optical connectors. Do not stare into the beams or view directly withoptical instruments to prevent eye damages.

l When the BSC6900 and other NEs are connected in optical port backup mode, replacing oneoptical cable does not affect services of the system. Otherwise, replacing an optical cabledisrupts all the services carried on that cable.

l When the BSC6900 and its peer equipment are connected through only the optical cable, allservices between them are disrupted during the replacement.

Lay optical cables or install optical cables by referring to Installing the Optical Cables.

Procedure

Step 1 Attach temporary labels to the new cable for easy identification. It is recommended that contentof the temporary label be consistent with that of the original label.

Step 2 Lay out the new optical cable according to the original routing or according to the new routingrequirements on site.

Step 3 Remove the optical cable to be replaced.

If... Then...

The connector type is LC/PC or SC/PC. Press the tab on the connector and remove thecable.

The connector type is FC/PC, Unscrew the optical connector counterclockwise.

NOTE

If the removed optical cable is not damaged, cap the connector. If the connectors are dirty, clean them withthe dustfree cotton cloth or the fiber cleaner.

Step 4 Remove the dustproof cap from the optical connector and reserve the cap for later use. Connectthe new cable to the original ports.




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CAUTIONFor the LC/PC, SC/PC or FC/PC connector, the TX end and the RX end must be connectedcorrectly by referring to the temporary label. Otherwise, the signal cannot be received ortransmitted.

Step 5 Replace the temporary labels on the new cable with the engineering labels. Content of theengineering label must be consistent with that of the temporary label. For details, see Attachingan Engineering Label to a Signal Cable.

Step 6 Bind the new optical cable.


Table 8-4 Checklist for optical cable replacement

Item Result Action



No Remove the cable and reconnect it.

The connectors ofthe optical cable areproperly insertedinto the port.



Alarms related to thetransmission cableare cleared.

Yes End the check.

NoClear these alarms by referring to the alarm onlinehelp on the LMT. If the faults persist, contactHuawei for technical support.

----End

Follow-up ProcedureDispose of the replaced optical cables to prevent environmental pollution.

8.4 Replacing an Ethernet CableThis section describes how to replace an Ethernet cable. It takes 5 to 20 minutes to replace anEthernet cable.

Prerequisitel The tools are ready. The tools are the ESD wrist strap, Ethernet cable meter, Ethernet cable

pliers, and diagonal pliers.

l The materials are ready. The materials are cable ties or wax strings.

l A new Ethernet cable is ready.



8-9

Context


CAUTIONl Replacing the Ethernet cables to the LMT disrupts the communication between the LMT PC

and the OMU.

l The Port Trunking function is used in the interconnection ports on the inter-subrack SCUaboard. Replacing one Ethernet cable has no adverse effect on the system.

l For the FG2a board, if the BSC6900 is connected to the peer equipment through only theEthernet cable, services carried between the BSC6900 and the peer equipment are disruptedduring the replacement of the Ethernet cable.

l The OMUa board is configured with a pair of Ethernet cables. Replacing one of them has noadverse impact on the system.

l Confirm the quantity, length, and type of the Ethernet cables to be replaced. The Ethernetcables from different manufacturers differ in color and diameter. The new Ethernet cableshould be compatible with the cable to be replaced.

l Lay Ethernet cables or install Ethernet cables by referring to Installing the Ethernet Cables.

Procedure

Step 1 Arrange for a new Ethernet cable with proper length and type. Note that extra length should bereserved.

Step 2 Assemble the shielded RJ45 connector or the unshielded RJ45 connector and the Ethernet cableaccording to the actual requirements by referring to Assembling the Shielded RJ45 Connectorand the Ethernet Cable or Assembling the Unshielded RJ45 Connector and the Ethernet Cable,and then check the appearance of metal contact strips and test the connection of assembled cablesby referring to Checking the Appearance of Metal Contact Strips and Testing the Connection ofAssembled Cables.

Step 3 Attach temporary labels to the new cable for clear identification.It is recommended that the content of the temporary label be consistent with that of the old label.

Step 4 Lay out the new Ethernet cable according to the original or on-site routing requirements.

Step 5 Disconnect the Ethernet cable to be replaced from the ports.

Step 6 Connect the new Ethernet cable to the original ports.

Step 7 Replace the temporary labels on the new cable with the engineering labels




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Content of the engineering label must be consistent with that of the temporary label. For details,see Attaching an Engineering Label to a Signal Cable.

Step 8 Bind the new Ethernet cable with cable ties.


Table 8-5 Checklist for Ethernet cable replacement

Item Result Action




The connectors of thecable are properlyinserted into the port.



Alarms related tonetworkcommunications arecleared.


NoClear these alarms by referring to the alarmonline help on the LMT. If the faults persist,contact Huawei for technical support.

Two ends connected bythe cable can properlycommunicate witheach other after thePing command isexecuted in DOSmode.

Yes End the check.

No Check the cable connection. If the cableconnection is faulty, replace it with a new one.

----End

Follow-up ProcedureDispose of the replaced Ethernet cable to prevent environmental pollution.

8.5 Replacing a Clock Signal CableThis section describes how to replace a clock signal cable. It takes five to twenty minutes toreplace a clock signal cable depending on the installation position of the reference clock.

Prerequisitel The tools are ready. The tools are the ESD wrist strap and diagonal pliers.l The materials are ready. The materials are cable ties or wax strings.l A new clock signal cable is ready.



8-11

Context


Lay clock signal cables or install clock signal cables by referring to Installing the Clock SignalCables.

Procedure

Step 1 Attach temporary labels to the new cable for easy identification. It is recommended that contentof the temporary label be identical with that of the old label.

Step 2 Lay out the new clock signal cable according to the original routing or according to the newrouting requirements on site.

Step 3 Disconnect the clock signal cable from the port.

Step 4 Connect the new clock signal cable to the original ports.



Step 6 Bind the new clock signal cables.

Step 7 After replacing the clock signal cable, check the items in Table 8-6.

Table 8-6 Checklist for clock signal cable replacement

Item Result Action




The connectors of theclock signal cable areproperly inserted intothe ports.


No Secure the connectors.

Alarms related to theclock signal cable arecleared.

Yes End the check.

NoClear these alarms by referring to the alarm onlinehelp on the LMT. If the faults persist, contactHuawei for technical support.

----End




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Follow-up ProcedureDispose of the replaced clock signal cable to prevent environmental pollution.

8.6 Replacing a Y-Shaped Clock CableThis section describes how to replace a Y-shaped clock cable. It takes about 5 to 20 minutes toreplace a Y-shaped clock cable, depending on the installation position of the Y-shaped clockcable.

Prerequisitel The tools and items required for replacing a Y-shaped clock cable are ready. The tools and

items are ESD wrist strap and diagonal pliers.l The required materials are ready. The materials are cable ties or wax strings.l A new Y-shaped clock cable is ready.

Context


CAUTIONReplacing the Y-shaped clock cable triggers a clock alarm and leads to a failover of the SCUa.

Lay Y-shaped clock cables or install Y-shaped clock cables by referring to Installing the Y-Shaped Clock Cables.

Procedure

Step 1 Confirm the number, length, and type of the clock cables to be replaced. Attach temporary labelsto the new cables to distinguish them from others. The content on the temporary label should beidentical to the content on the engineering label of the Y-shaped clock cable to be replaced.

Step 2 Ensure that the Y-shaped clock cable is connected to an SCUa in standby mode. Before replacingthe Y-shaped clock cable connecting to the active SCUa, switch the SCUa from the active stateto the standby state.

Step 3 Disconnect the Y-shaped clock cable from the ports.

Step 4 Lay out the new Y-shaped clock cable according to the original route.

Step 5 Connect the new Y-shaped clock cable to the original ports.



8-13

Step 6 Replace the temporary label on the new cable with the engineering label.

The content on the engineering label of the new Y-shaped clock cable must be identical to thecontent on the engineering label of the original Y-shaped clock cable. For details, see Attachingan Engineering Label to a Signal Cable.

Step 7 Bind the new Y-shaped clock cable.

Step 8 After replacing the Y-shaped clock cable, check the items listed in Table 8-7.

Table 8-7 Checklist for the new Y-shaped clock cable

Item Result Action

Check whether thephysical connection iscorrect.


No Remove the Y-shaped clock cableand reconnect it.

Check whether theconnector of the Y-shaped clock cable isproperly inserted into theport.


No Secure the insertion.

Check whether alarmsrelated to the clock cableare cleared.

Yes End the check.

No 1. Handle the alarm by referring tothe alarm help information on theLMT.

2. If the alarms persist, contactHuawei Customer ServiceCenter.

----End

Follow-up Procedure

Dispose of the replaced Y-shaped clock cable in an environment-friendly way.

8.7 Replacing an Inter-TNUa CableThis section describes how to replace an inter-TNUa cable. It takes five to twenty minutes toreplace an inter-TNUa cable depending on the installation position.

Prerequisitel The tools are ready, including the ESD wrist strap, flat-head screwdriver, and diagonal

pliers.

l The required materials are ready. The materials are cable ties or wax strings.

l A new inter-TNUa cable is ready.




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Context


CAUTIONReplacing the inter-TNUa cable disrupts the TDM switching services between the two subracksthat are connected by the inter-TNUa cable.

Lay inter-TNUa cables or install inter-TNUa cables by referring to Installing the Inter-TNUaCables.

Procedure

Step 1 Confirm the quantity, length, and type of the inter-TNUa cables to be replaced. Attach temporarylabels to the new cables for easy identification.

The content on the temporary label should be identical with the content on the engineering labelof the inter-TNUa cable to be replaced.

Step 2 Remove the fastening screws from the inter-TNUa cable connector without using any tools, andthen remove the cable.

Step 3 Lay out the new inter-TNUa cable according to the original routing, or according to the newrouting requirements on site.

Step 4 Connect the new inter-TNUa cable to the original ports without using any tools.

Step 5 Replace the temporary labels on the new inter-TNUa cable with the engineering labels.

The content on the engineering label of the new inter-TNUa cable must be identical with thecontent on the engineering label of the original inter-TNUa cable. For details, see Attaching anEngineering Label to a Signal Cable.

Step 6 Bind the new inter-TNUa cable.

Step 7 After replacing the inter-TNUa cable, check the items listed in Table 8-8.

Table 8-8 Checklist for inter-TNUa cable replacement

Item Result Action



No Remove the inter-TNUa cableand reconnect it.



8-15

Item Result Action

The connectors of thecable are properlyinserted into the port.



Alarms related totransmission cablesare cleared.

Yes End the check.

No 1. Clear the alarms by referringto the alarm online help onthe LMT.

2. If the alarms persist, contactHuawei for technical support.

----End

Follow-up Procedure

Dispose of the replaced inter-TNUa cable to prevent short circuit and environmental pollution.

8.8 Replacing an EMU RS485 Communication CableThis section describes how to replace the RS485 communication cable. It takes about fiveminutes to replace the RS485 communication cable.

Prerequisitel The tools are ready, including the ESD gloves, diagonal pliers, and flat-head screwdriver.

l The required materials are ready, including cable ties or wax strings.

l A new RS485 communication cable is ready.

Context


Lay RS485 communication cables or install RS485 communication cables by referring toInstalling the EMU RS485 Communication Cables.

Procedure

Step 1 Lay out the new signal cable according to the original routing, or according to the new routingrequirements on site.




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Step 2 On the EMU side, remove the DB9 male connector on one end of the EMU RS485communication cable from the DB9 female socket on the EMU.

Step 3 On the BSC6900 side, remove the RJ45 connector on the other end of the EMU RS485communication cable from the J1 port on the power distribution box of the BSC6900 cabinet.

Step 4 According to the original cable positions, connect a new RS485 communication cable to theEMU and the power distribution box.

Step 5 Attach engineering labels to the new RS485 communication cable. For details, see Attaching anEngineering Label to a Signal Cable.

The content on the engineering label of the new RS485 communication cable must be identicalwith that on the engineering label of the original RS485 communication cable.

Step 6 Power on the EMU.

Step 7 Test the EMU by referring to the manual delivered with the EMU.

Step 8 If the LEDs on the front panel of the EMU indicate abnormal communication on the serial port,check the connection.

----End

Follow-up Procedure

Dispose of the replaced RS485 communication cable properly to prevent environmentalpollution.

8.9 Replacing a Signal Cable to the Alarm BoxThis section describes how to replace a signal cable connected to the alarm box. It takes five totwenty minutes to replace a signal cable depending on the installation position of the alarm box.

Prerequisitel The tools are ready. The tools are the ESD gloves, ESD wrist strap, and diagonal pliers.

l The materials are ready. The materials are cable ties.

l A new signal cable is ready.

Context




8-17

CAUTIONCommunication between the alarm box and the LMT PC is disrupted during the replacement.

Procedure

Step 1 Lay out the new signal cable according to the original routing or according to the new routingrequirements on site.

Step 2 Loosen the DB9/DB25 connector and then remove the signal cable from the LMT that reportsalarms.

Step 3 On the alarm box side, power off the alarm box, unlock the alarm box, remove the front panel,and then disconnect the signal cable.

Step 4 Connect the new signal cable to the LMT PC and the alarm box by referring to the originalconnection of the signal cable.

Step 5 Reinstall the front panel and lock the alarm box.

Step 6 Attach engineering labels to the new signal cable. The content of the new label must be the sameas the content of the old one.

Step 7 Power on the alarm box.

Step 8 Test the alarm box by referring to the manual delivered with the alarm box.

Step 9 If the LEDs on the front panel of the alarm box indicate abnormal communication on the serialport, check the connection.

----End

Follow-up ProcedureDispose of the replaced signal cable properly to prevent environmental pollution.

8.10 Replacing the Monitoring Signal Cable for the PowerDistribution Box

This section describes how to replace a monitoring cable of the power distribution box. It takesabout 10 minutes to replace a monitoring cable.

Prerequisitel The tools are ready. The tools are the ESD wrist strip, diagonal pliers, and Phillips

screwdriver.


l A new monitoring cable is ready.




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Context


Procedure

Step 1 Attach temporary labels to the new cable for easy identification. It is recommended that contentof the temporary label be consistent with that of the old label.

Step 2 Lay out the monitoring cable.

Step 3 Remove the monitoring cable to be replaced from the port.

Step 4 Connect the new monitoring cable to the original ports.



Step 6 Bind the monitoring cable.

Step 7 After replacing the monitoring cable of the power distribution box, check the items in Table8-9.

Table 8-9 Checklist for monitoring cable replacement

Item Result Action



No Remove the monitoring cable and connect thecable again.

The connectors of themonitoring cable areproperly inserted intothe port.



LEDs on the panelproperly indicate therunning of powerdistribution box.


No Contact Huawei for technical support.

Alarms related to themonitoring cable arecleared.

Yes End the check.

NoClear these alarms by referring to the alarmonline help on the LMT. If the faults persist,contact Huawei for technical support.



8-19

----End

Follow-up ProcedureDispose of the replaced monitoring cable to prevent environmental pollution.

8.11 Replacing the Monitoring Signal Cable for theIndependent Fan Subrack

This section describes how to replace a monitoring signal cable for the independent fan subrack.It takes about 10 minutes to replace a monitoring signal cable for the independent fan subrack.

Prerequisitel The tools are ready. The tools are the ESD wrist strip, diagonal pliers, and Phillips

screwdriver.


l A new monitoring signal cable for the independent fan subrack is ready.

Context


Procedure

Step 1 Attach temporary labels to the new cable for easy identification. It is recommended that contentof the temporary label be identical with that of the old label.

Step 2 Lay out the new monitoring signal cable for the independent fan subrack.

Step 3 Disconnect the monitoring signal cable to be replaced from the port.

Step 4 Connect the new monitoring signal cable to the corresponding port.


The content of the engineering label must be consistent with that of the temporary label. Fordetails, see Attaching an Engineering Label to a Signal Cable.

Step 6 Bind the monitoring signal cable to other cables.

Step 7 After replacing the monitoring signal cable, check the items in Table 8-10.




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Table 8-10 Checklist for monitoring signal cable replacement

Item Result Action



No Remove the monitoring signal cable and connectthe cable again.

The connectors of themonitoring signal cableare securely connectedto the ports.


No Secure the connectors of the monitoring signalcable.

The LEDs on the panelof the independent fansubrack correctlyindicate the state of thefan box.


No Contact Huawei for technical support.

Alarms related to themonitoring signal cableare cleared.

Yes End the check.

NoClear the alarms by referring to the alarm onlinehelp on the LMT. If the alarms persist, contactHuawei for technical support.

----End

Follow-up ProcedureDispose of the replaced monitoring signal cable properly to prevent environmental pollution.



8-21

9 LEDs on the Boards

About This Chapter

This chapter describes the LEDs on the BSC6900 boards.

9.1 LEDs on the DPUa BoardThere are three LEDs on the DPUa board: RUN, ALM, and ACT.

9.2 LEDs on the DPUc BoardThere are three LEDs on the DPUc board: RUN, ALM, and ACT.

9.3 LEDs on the DPUd BoardThere are three LEDs on the DPUd board: RUN, ALM, and ACT.

9.4 LEDs on the EIUa BoardThere are three LEDs on the EIUa board: RUN, ALM, and ACT.

9.5 LEDs on the FG2a BoardAmong all the LEDs on the FG2a board, RUN, ALM, and ACT indicate the status of the FG2aboard, and other LEDs indicate the status of Ethernet ports. There are two LEDs at each Ethernetport: LINK and ACT.

9.6 LEDs on the FG2c BoardAmong all the LEDs on the FG2c board, RUN, ALM, and ACT indicate the status of the FG2cboard, and other LEDs indicate the status of Ethernet ports. There are two LEDs at each Ethernetport: LINK and ACT.

9.7 LEDs on the GCUa BoardThere are three LEDs on the panel of the GCUa board: RUN, ALM, and ACT.

9.8 LEDs on the GOUa BoardThere are three LEDs on the GOUa board: RUN, ALM, and ACT.

9.9 LEDs on the GOUc BoardThere are five types of LEDs on the GOUc board: RUN, ALM, ACT, LINK (optical port LED),and ACT (optical port LED).

9.10 LEDs on the MDMC BoardThere are two LEDs on the MDMC board: RUN and ALM.

9.11 LEDs on the OIUa Board

BSC6900 GSMSite Maintenance Guide 9 LEDs on the Boards


9-1

There are four LEDs on the OIUa board: RUN, ALM, ACT, and LOS.

9.12 LEDs on the OMUa/OMUb BoardThere are five types of LEDs on the OMUa/OMUb board: RUN, ALM, ACT, OFFLINE, andHD.

9.13 LEDs on the PAMU BoardThere are two LEDs on the PAMU board: RUN and ALM.

9.14 LEDs on the PEUa BoardThere are three LEDs on the PEUa board: RUN, ALM, and ACT.

9.15 LEDs on the POUc BoardThere are four types of LEDs on the POUc board: RUN, ALM, ACT, and LOS.

9.16 LEDs on the SCUa BoardAmong all the LEDs on the SCUa board, RUN, ALM, and ACT indicate the status of the SCUaboard, and other LEDs indicate the status of Ethernet ports. There are two LEDs at each Ethernetport: LINK and ACT.

9.17 LEDs on the TNUa BoardThere are three LEDs on the TNUa board: RUN, ALM, and ACT.

9.18 LEDs on the XPUa BoardAmong all the LEDs on the XPUa board, RUN, ALM, and ACT indicate the status of the XPUaboard, and other LEDs indicate the status of Ethernet ports. There are two LEDs at each Ethernetport: LINK and ACT.

9.19 LEDs on the XPUb BoardAmong all the LEDs on the XPUb board, RUN, ALM, and ACT indicate the status of the XPUbboard, and other LEDs indicate the status of Ethernet ports. There are two LEDs at each Ethernetport: LINK and ACT.

9 LEDs on the BoardsBSC6900 GSM



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9.1 LEDs on the DPUa BoardThere are three LEDs on the DPUa board: RUN, ALM, and ACT.

Table 9-1 describes the LEDs on the DPUa board.

Table 9-1 LEDs on the DPUa board

LED Color Status Description

RUN Green ON for 1s and OFF for1s

The board is functional.

ON for 0.125s and OFFfor 0.125s

The board is in loading state.

ON There is power supply, but the boardis faulty.

OFF There is no power supply, or the boardis faulty.

ALM Red OFF There is no alarm.

ON or blinking There is a fault alarm.

ACT Green ON The board is functional.

OFF The board is loading software or it isabnormal.

9.2 LEDs on the DPUc BoardThere are three LEDs on the DPUc board: RUN, ALM, and ACT.

Table 9-2 describes the LEDs on the DPUc board.

Table 9-2 LEDs on the DPUc board






ON There is power supply, but theboard is faulty.

OFF There is no power supply, or theboard is faulty.



9-3





OFF The board is loading software orit is abnormal.

9.3 LEDs on the DPUd BoardThere are three LEDs on the DPUd board: RUN, ALM, and ACT.

Table 9-3 describes the LEDs on the DPUd board.

Table 9-3 LEDs on the DPUd board


RUN Green ON for 1s and OFFfor 1s


ON for 0.125s andOFF for 0.125s







OFF The board is loading software or itis abnormal.

9.4 LEDs on the EIUa BoardThere are three LEDs on the EIUa board: RUN, ALM, and ACT.

Table 9-4 describes the LEDs on the EIUa board.




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Table 9-4 LEDs on the EIUa board







OFF There is no power supply, or the boardis faulty.



ACT Green ON The board is in active mode.

OFF The board is in standby mode.

9.5 LEDs on the FG2a BoardAmong all the LEDs on the FG2a board, RUN, ALM, and ACT indicate the status of the FG2aboard, and other LEDs indicate the status of Ethernet ports. There are two LEDs at each Ethernetport: LINK and ACT.

Table 9-5 describes the LEDs on the FG2a board.

Table 9-5 LEDs on the FG2a board


RUN Green ON for 1s and OFF for 1s The board is functional.

ON for 0.125s and OFF for0.125s

The board is in loadingstate.

ON There is power supply, butthe board is faulty.

OFF There is no power supply,or the board is faulty.



ACT Green ON The board is in activemode.

OFF The board is in standbymode.



9-5


LINK (at theEthernet port)

Green ON The link is well connected.

OFF The link is disconnected.

ACT (at theEthernet port)

Green OFF There is no datatransmission over theEthernet port.

Blinking There is data transmissionover the Ethernet port.

9.6 LEDs on the FG2c BoardAmong all the LEDs on the FG2c board, RUN, ALM, and ACT indicate the status of the FG2cboard, and other LEDs indicate the status of Ethernet ports. There are two LEDs at each Ethernetport: LINK and ACT.

Table 9-6 describes the LEDs on the FG2c board.

Table 9-6 LEDs on the FG2c board















Orange OFF There is no datatransmission over theEthernet port.




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9.7 LEDs on the GCUa BoardThere are three LEDs on the panel of the GCUa board: RUN, ALM, and ACT.

Table 9-7 describes the LEDs on the GCUa board.

Table 9-7 LEDs on the GCUa board












9.8 LEDs on the GOUa BoardThere are three LEDs on the GOUa board: RUN, ALM, and ACT.

Table 9-8 describes the LEDs on the GOUa board.

Table 9-8 LEDs on the GOUa board







9-7








9.9 LEDs on the GOUc BoardThere are five types of LEDs on the GOUc board: RUN, ALM, ACT, LINK (optical port LED),and ACT (optical port LED).

Table 9-9 describes the LEDs on the GOUc board.

Table 9-9 LEDs on the GOUc board











LINK (opticalport LED)






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ACT (opticalport LED)



9.10 LEDs on the MDMC BoardThere are two LEDs on the MDMC board: RUN and ALM.

Table 9-10 describes the LEDs on the MDMC board.

Table 9-10 LEDs on the MDMC board



The MDMC board is functional andcommunicates with the SCUa boardproperly.


The MDMC board is not working or itdoes not communicate with the SCUaboard properly.

OFF The power supply to the MDMC boardis abnormal or the power distributionbox does not work properly.


ON The power distribution box is faulty.During the self-check of the MDMCboard, however, the ALM LED is alsoON. This indicates that the ALM LEDis functional.

9.11 LEDs on the OIUa BoardThere are four LEDs on the OIUa board: RUN, ALM, ACT, and LOS.

Table 9-11 describes the LEDs on the OIUa board.

Table 9-11 LEDs on the OIUa board





9-9










LOS Green ON The STM-1 port does not receivesignals properly.

OFF The STM-1 port receives signalsproperly.

9.12 LEDs on the OMUa/OMUb BoardThere are five types of LEDs on the OMUa/OMUb board: RUN, ALM, ACT, OFFLINE, andHD.

Table 9-12 describes the LEDs on the OMUa/OMUb board.

Table 9-12 LEDs on the OMUa/OMUb board




The board is being started.






OFF The board is in standby mode, or theboard is disconnected.




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OFFLINE Blue ON The board can be removed.

OFF The board cannot be removed.


The board is being switched over tothe other working mode.

HD Green OFF There is no read or write operationon the hard disk.

Blinking The hard disk is being read orwritten.

9.13 LEDs on the PAMU BoardThere are two LEDs on the PAMU board: RUN and ALM.

Table 9-13 describes the LEDs on the PAMU board.

Table 9-13 LEDs on the PAMU board



The PAMU board is functional andcommunicates with the SCUa boardproperly.


The PAMU board is faulty or it does notcommunicate with the SCUa boardproperly.

OFF The power supply to the PAMU boardis abnormal or the power distributionbox does not work properly.


ON The power distribution box is faulty.During the self-check of the PAMUboard, however, the ALM LED is alsoON. This indicates that the ALM LEDis functional.

9.14 LEDs on the PEUa BoardThere are three LEDs on the PEUa board: RUN, ALM, and ACT.

Table 9-14 describes the LEDs on the PEUa board.



9-11

Table 9-14 LEDs on the PEUa board











9.15 LEDs on the POUc BoardThere are four types of LEDs on the POUc board: RUN, ALM, ACT, and LOS.

Table 9-15 describes the LEDs on the POUc board.

Table 9-15 LEDs on the POUc board











LOS Green ON The STM-1 port does not receivesignals properly.




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OFF The STM-1 port receives signalsproperly.

9.16 LEDs on the SCUa BoardAmong all the LEDs on the SCUa board, RUN, ALM, and ACT indicate the status of the SCUaboard, and other LEDs indicate the status of Ethernet ports. There are two LEDs at each Ethernetport: LINK and ACT.

Table 9-16 describes the LEDs on the SCUa board.

Table 9-16 LEDs on the SCUa board

















9.17 LEDs on the TNUa BoardThere are three LEDs on the TNUa board: RUN, ALM, and ACT.



9-13

Table 9-17 describes the LEDs on the TNUa board.

Table 9-17 LEDs on the TNUa board





ON There is power supply,but the board is faulty.

OFF There is no powersupply, or the board isfaulty.





9.18 LEDs on the XPUa BoardAmong all the LEDs on the XPUa board, RUN, ALM, and ACT indicate the status of the XPUaboard, and other LEDs indicate the status of Ethernet ports. There are two LEDs at each Ethernetport: LINK and ACT.

Table 9-18 describes the LEDs on the XPUa board.

Table 9-18 LEDs on the XPUa board












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Green OFF There is no data transmission overthe Ethernet port.

Blinking There is data transmission over theEthernet port.

9.19 LEDs on the XPUb BoardAmong all the LEDs on the XPUb board, RUN, ALM, and ACT indicate the status of the XPUbboard, and other LEDs indicate the status of Ethernet ports. There are two LEDs at each Ethernetport: LINK and ACT.

Table 9-19 describes the LEDs on the XPUb board.

Table 9-19 LEDs on the XPUb board















Orange OFF There is no data transmission overthe Ethernet port.



9-15


Blinking There is data transmission over theEthernet port.




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10 DIP Switches on Components

About This Chapter

This chapter describes the DIP switches on the boards and subracks of the BSC6900.

10.1 DIP Switch on the SubrackThe DIP switch on a subrack is used to set the number of the subrack.

10.2 DIP Switches on the EIUa BoardThe EIUa board provides five DIP switches, namely, S1, S3, S4, S5, and S6.

10.3 DIP Switch on the MDMC BoardThe MDMC board provides an S2 DIP switch.

10.4 DIP Switch on the PAMU BoardThe PAMU provides an SW1 DIP switch.

10.5 DIP Switches on the PEUa BoardThe PEUa board provides five DIP switches, namely, S2, S4, S6, S8, and S10.

10.6 DIP Switch on the PFCU BoardThe PFCU board has one DIP switch, which is named SW1 and consists of four bits. The DIPswitch is used to set the address of the PFCU board. When the PFCU board is configured in afan box of the service subrack, the address of the PFCU board is set to 1. When the PFCU boardis configured in the independent fan subrack, the address of the PFCU board is set to 4.

10.7 Pins on the PFCB BoardThe PFCB board provides eight pairs of pins for jumpers. After being connected to jumpers,these pins are used to set the address and working mode of the PFCB board. The settings of thesepins depend on the installation position of the PFCB board.

BSC6900 GSMSite Maintenance Guide 10 DIP Switches on Components


10-1

10.1 DIP Switch on the SubrackThe DIP switch on a subrack is used to set the number of the subrack.

Location of the DIP SwitchThe DIP switch is located on the lower back of the subrack. For details on the location of theDIP switch, see Components of the Subrack.

AppearanceFigure 10-1 shows the cover plate for the DIP switch on the subrack.

Figure 10-1 Cover plate for the DIP switch on the subrack

Description about the DIP SwitchThe DIP switch on the subrack has eight bits numbered in ascending order from 1 to 8. Thehigher the bit is, the more significant it is. Table 10-1 describes the bits.

10 DIP Switches on ComponentsBSC6900 GSM



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Table 10-1 Description about the bits

Bit Description

1-5 Bits 1 to 5 are used for setting the subrack number. Bit 1 is theleast significant bit. If the bit is set to ON, it indicates 0. If the bitis set to OFF, it indicates 1.

6 Odd parity check bit

7 Reserved, undefined, generally set to ON


Reserved

Principle of the DIP Switch Setting

As the DIP switch uses odd parity check, the number of 1s in the eight bits must be an oddnumber. The method for setting the bits is as follows:

1. Set bit 1 to bit 5 as required.

2. Set bit 7 to ON.

3. Note that the setting of bit 8 remains unchanged.

4. Check the number of 1s in the seven bits of the DIP switch.

l If the number of 1s is even, set bit 6 to OFF.

l If the number of 1s is odd, set bit 6 to ON.

Table 10-2 describes the setting of the DIP switch in the case.

Table 10-2 Setting of the DIP switch

SubrackNo.

Bit Setting of theDIP Switch

1 2 3 4 5 6 7 8

0 0 0 0 0 0 0 0 1

ON ON ON ON ON ON ON OFF

1 1 0 0 0 0 1 0 1

OFF ON ON ON ON OFF ON OFF

2 0 1 0 0 0 1 0 1

ON OFF ON ON ON OFF ON OFF

3 1 1 0 0 0 0 0 1

OFF OFF ON ON ON ON ON OFF

4 0 0 1 0 0 1 0 1



10-3

SubrackNo.

Bit Setting of theDIP Switch

1 2 3 4 5 6 7 8

ON ON OFF

ON ON OFF ON OFF

5 1 0 1 0 0 0 0 1

OFF ON OFF

ON ON ON ON OFF

10.2 DIP Switches on the EIUa BoardThe EIUa board provides five DIP switches, namely, S1, S3, S4, S5, and S6.

Figure 10-2 shows the layout of the DIP switches on the EIUa board.

Figure 10-2 Layout of the DIP switches on the EIUa board

(1) Sub-board (2) Bottom plate




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NOTE

l When the 75-ohm coaxial cable is used, the signal transmission uses the E1 unbalanced mode. In thiscase, the TX end is grounded, that is, the corresponding bit of the DIP switch is set to ON.

l When the 120-ohm twisted pair cable is used, the signal transmission uses the E1(T1) balanced mode.In this case, the TX end is not grounded, that is, the corresponding bit of the DIP switch is set to OFF.

l All DIP switches of the EIUa board are on the front panel of the sub-board. The front panel is faced toand combined with the bottom plate, and so the DIP switches are hidden in between.

Table 10-3 describes the DIP switches on the EIUa board.

Table 10-3 Description of the DIP switches on the EIUa board

DIP Switch Bit Description Setting for 75-ohm CoaxialCable

Setting for120-ohmTwisted PairCable

S1 8 Impedanceselection switchof E1s/T1s 0-7

ON OFF

7 Impedanceselection switchof E1s/T1s 8-15

ON OFF

6 Impedanceselection switchof E1s/T1s16-23

ON OFF

5 Impedanceselection switchof E1s/T1s24-31

ON OFF

1-4 Reserved

S3 1-8 TX groundswitch of E1s/T1s 0-7

ON OFF


ON OFF


ON OFF


ON OFF

Table 10-4 describes the different DIP switches.



10-5

Table 10-4 Description of the different DIP switches

DIP Switch Description

E1/T1 impedance selection switch Used to select the logical transmission mode of theboard and to notify the software of the currenttransmission mode

E1/T1 TX ground switch Used to control the grounding of the transmitting endof the E1/T1 signals

NOTE

l The DIP switches are set for 75-ohm coaxial cables by default.l The setting for the DIP switches on the active board must be the same as that for the DIP switches

on the standby board.l The RX end is not grounded either in balanced or in unbalanced mode.

10.3 DIP Switch on the MDMC BoardThe MDMC board provides an S2 DIP switch.

Figure 10-3 shows the layout of the DIP switch on the MDMC board.

Figure 10-3 DIP switch on the MDMC board

With four bits, the DIP switch S4 is used to set the address of the MDMC board.

To set the address, first remove the MDMC board and then set S2 as described in Table 10-5.

Table 10-5 DIP switch on the MDMC board

Address Bit Setting of DIP Bit Description

0 1 (the most significantbit)

ON 0

2 ON 0

3 ON 0

4 (the least significantbit)

ON 0




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NOTE

In the BSC6900, the DIP switch on the MDMC board must be set as described in Table 10-5.

10.4 DIP Switch on the PAMU BoardThe PAMU provides an SW1 DIP switch.

Figure 10-4 shows the layout of the DIP switch on the PAMU board.

Figure 10-4 Layout of the DIP switch on the PAMU board

With four bits, the DIP switch SW1 is used to set the address of the PAMU board.

To set the address, first remove the PAMU board and then set the SW1 as described in Table10-6.

Table 10-6 DIP switch on the PAMU board

Address Bit Setting of DIP Bit Description

0 1 (the most significantbit)

ON 0

2 ON 0

3 ON 0

4 (the least significantbit)

ON 0

NOTE

In the BSC6900, the DIP switch on the PAMU board must be set as described in Table 10-6.

10.5 DIP Switches on the PEUa BoardThe PEUa board provides five DIP switches, namely, S2, S4, S6, S8, and S10.

Figure 10-5 shows the layout of the DIP switches on the PEUa board.



10-7

Figure 10-5 Layout of the DIP switches on the PEUa board

(1) Sub-board (2) Bottom plate




Issue 05 (2011-05-19)

NOTE

l All DIP switches are on the front panel of the sub-board. The front panel is combined with the bottomplate, so the DIP switches are not exposed.

l DIP switches S2, S4, S6, S8, and S10 are set from the side. As shown in Figure 10-5, there are twosquare holes between DIP switches, one between S2 and S4, and the other between S8 and S6. Throughthe two holes, you can set S2, S4, S8, and S6. DIP switch S10 is located in the right corner of the sub-board, and thus you can set S10 along the side.The direction of the arrow in Figure 10-5 is to turninwards. To set the bits of S2, S4, S6, or S8 to ON, turn them inwards. To set the bits of S2, S4, S6, orS8 to OFF, turn them outwards. To set the bits of S10 to ON, turn them outwards. To set the bits ofS10 to OFF, turn them inwards.

l You can also run the SET E1T1 command on the LMT to set S10. If there is any inconsistency betweenthe physical setting of S10 on the PEUa board and the setting of S10 by command, take the setting bycommand as the criterion. By default, the working mode of S10 is set to E1. You can also run the SETE1T1 command on the LMT to change the working mode of S10 from E1 mode to E1 balanced mode,E1 unbalanced mode, or T1 mode. When you run the SET E1T1 command to set the support forbalanced and unbalanced modes parameter to No and set the working mode of S10 to E1, you mustalso manually set the bits of S10 to set the working mode of S10 to E1 balanced mode or E1 unbalancedmode.

l If signals are transmitted in E1 unbalanced mode, the signals are transmitted through the 75-ohm coaxialcable and the TX end of the cable is grounded, that is, the corresponding DIP bit is set to ON. If signalsare transmitted in E1(T1) balanced mode, the signals are transmitted through the 120-ohm twisted paircable and the TX end of the cable is not grounded, that is, the corresponding DIP bit is set to OFF.

DIP switches S2, S4, S6, and S8 on the PEUa board are used to enable or disable the groundingof 0 to 31 E1s/T1s/J1s at the TX end. DIP switch S10 is used to set the working mode to E1balanced mode, E1 unbalanced mode, T1 mode, or J1 mode. Table 10-7 describes S2, S4, S6,S8, and S10.

Table 10-7 Description about DIP switches on the PEUa board

DIPSwitch

Bit Description Setting of DIPSwitch

Meaning

S2 1-8 TX ground switch ofE1s/T1s/J1s 24 to 31

ON Setting theworking mode toE1 unbalancedmode

OFF Setting theworking mode toother modes








10-9

DIPSwitch

Bit Description Setting of DIPSwitch

Meaning





S10 1-2 DIP switch for setting theworking mode,consisting of two bits

(ON, ON) Setting theworking mode toE1 unbalancedmode

(OFF, ON) Setting theworking mode toE1 balancedmode

(ON, OFF) Setting theworking mode toT1 mode

(OFF, OFF) Setting theworking mode toJ1 mode

NOTE

All the DIP switches are set to E1 balanced mode by default, that is, all the bits of S2, S4, S6, and S8 areset to OFF. For S10, the first bit is set to OFF, and the second bit to ON.

10.6 DIP Switch on the PFCU BoardThe PFCU board has one DIP switch, which is named SW1 and consists of four bits. The DIPswitch is used to set the address of the PFCU board. When the PFCU board is configured in afan box of the service subrack, the address of the PFCU board is set to 1. When the PFCU boardis configured in the independent fan subrack, the address of the PFCU board is set to 4.

DIP Switch on the PFCU Board (in a Fan Box of the service subrack)Figure 10-6 shows the DIP switch on the PFCU board.




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Figure 10-6 DIP switch on the PFCU board

To set the address of the PFCU board, remove the fan box, and then set SW1 as described inTable 10-8. For how to remove the fan box, see 7.21 Replacing the Fan Box. After setting theDIP switch, the address of the PFCU board is 1.

Table 10-8 DIP switch on the PFCU board (in a fan box of the service subrack)

DIP Switch Bit Setting of DIPSwitch

Description


OFF 1

2 ON 0

3 ON 0


ON 0

DIP Switch on the PFCU Board (in the Independent Fan Subrack)Figure 10-7 shows the DIP switch on the PFCU board.

Figure 10-7 DIP switch on the PFCU board

To set the address of the PFCU board, remove the fan box, and then set SW1 as described inTable 10-9. For how to remove the fan box, see 7.21 Replacing the Fan Box. After the setting,the address of the PFCU board is 4.



10-11

Table 10-9 DIP switch on the PFCU board (in the independent fan subrack)

DIP Switch Bit Setting of DIPSwitch

Description


ON 0

2 ON 0

3 OFF 1


ON 0

NOTE

The DIP switch on the PFCU board of the BSC6900 must be set according to the preceding descriptions.

10.7 Pins on the PFCB BoardThe PFCB board provides eight pairs of pins for jumpers. After being connected to jumpers,these pins are used to set the address and working mode of the PFCB board. The settings of thesepins depend on the installation position of the PFCB board.

Pins on the PFCB Board (in a Fan Box of the service subrack)Figure 10-8 shows the pins on the PFCB board.

Figure 10-8 Pins on the PFCB board

To set the address of the PFCB board, first remove the fan box and then set the pins as describedin Table 10-10.

Table 10-10 Pins on the PFCB board (in a fan box of the service subrack)

PinNumber

1-2 3-4 5-6 7-8 9-10 11-12 13-14 15-16

Connected tojumper

No No No No Yes No No No




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Pins on the PFCB Board (in the Independent Fan Subrack)Figure 10-9 shows the pins on the PFCB board.

Figure 10-9 Pins on the PFCB board

To set the address of the PFCB board, first remove the fan box and then set the pins as describedin Table 10-11.

Table 10-11 Pins on the PFCB board (in the independent fan subrack)

PinNumber

1-2 3-4 5-6 7-8 9-10 11-12 13-14 15-16

Connected tojumper

No No No No No No Yes No

NOTE

The pins on the PFCB board of the BSC6900 must be set according to the preceding descriptions.



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11 BSC6900 Site Maintenance Record

This chapter describes the BSC6900 site maintenance record.

Table 11-1 presents the BSC6900 site maintenance record.

Table 11-1 BSC6900 site maintenance record

Site name: Maintenance Date:

Time of fault occurring: Time of fault clearing:

Person on duty: Operator:

Maintenancetype

□ Replacing aboard

□ Replacing acable

□ Replacing the subrack, fanbox, or power distribution box

□ Routinecleaning

□ Expanding thesubrack or SPM □ Others

Maintenance operations:

Commissioning result:

BSC6900 GSMSite Maintenance Guide 11 BSC6900 Site Maintenance Record


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Bsc6900 gsm-site-maintenance-guide

Technology

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