Flexi Bts Troubleshooting

Soc Classification level 1 © Nokia Siemens Networks Flexi EDGE Base Station Troubleshooting / September 2008

Flexi EDGE BTS Troubleshooting

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Objective

After completing this learning element, the participant will be able to:• Perform preventive maintenance tasks• Perform corrective maintenance• Identify the problem as part of troubleshooting process• Recognize and recover the most common alarms in the BTS• Group alarms and faults into a few main categories • Use Flexi EDGE BTS Manager for troubleshooting• Recognize current features and failures of the SW Configuration and

compatibility• Replace faulty modules process• Perform the troubleshooting process to solve the cases

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Table of Content

• Introduction• Preventive Maintenance• Corrective Maintenance• Troubleshooting process• Problem symptoms for Troubleshooting• Troubleshooting Problem Situation• Example Cases• Appendix

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IntroductionSome Definitions

MaintenanceIn Flexi EDGE BTSMaintenance

In Flexi EDGE BTS

Preventive MaintenanceProvide regular maintenance to the Flexi EDGE BTS in order to reduce the possibility of failures or decreasing of performance

Corrective Maintenance

The activity in order to rectify or solve faults happened in the network, which have main purpose is to solve the problem and get the system/unit in the network back into normal

Detecting, tracing and analysis the mistakes of fault in the system networks, in order to find the fault locating or root cause of the faults and also to recommend solution to solve the fault.

TroubleshootingTroubleshooting

So, based on above explanation the corrective maintenance tasks are executed after the troubleshooting has been done.

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Preventive MaintenancePerforming Routine Maintenance Tasks• The purpose of preventive maintenance

is to provide regular maintenance to the exchange in order to reduce the possibility of failures.

• Before performing any tasks, determine whether there will be any interruption in service.

• If so, then certain steps need to be taken before the task is executed.

• It should be seen as a need to perform these on a regular basis, which can be different for each type of maintenance

• On the right hand, there is the example of how to perform routine maintenance tasks

Check that the grounding cables are properly connected

Check the fans and air circulation

Check the connector seals (rubber boots)

Check the cable connectors

Check the screws

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Preventive MaintenancePerforming Routine Maintenance Tasks

Due to flexibility of installation of Flexi EDGE BTS, these following physical check should be done:• Cleanness of the unit, especially for outdoor installation. Here is example

of unit in flexi edge BTS which is dirty

in some circumstances, we need to provide more protective action to avoid Flexi EDGE BTS from unfriendly environment, such as rats as shown above

Mouse attack Mouse protection

Broken seal because of rats

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• For cabling and connector installation, please follow the standard installation document from NED as recommended by NSN.

• These following pictures are example of mistakes that might happen in the field that can affect the performance of the system.No cover on the LMP port TX Cable broken

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Very sharp curve of TX CableUnnecessary bending of cable(blue line is ideal way)

Transmission cable is left open Broken cable

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Corrective Maintenance

• Corrective Maintenance is the activity in order to rectify or solve faults happened in the network, which have main purpose is to solve the problem and get the system/unit in the network back into normal.

• Usually, the corrective maintenance tasks are executed after the troubleshooting has been done.

• Replacing the module is the example of how the corrective maintenance is doing.

• Replacing the module could be one of the solution if there’s an alarm related to specific unit and after we do troubleshooting, we find out that specific unit is faulty.

• Here is the example of corrective maintenance related to the HW:– Disconnecting the cables– Replacing the module Fans– Disabling and enabling power with Flexi EDGE BTS– Replacing modules, such as: EXxA, ERxA, ESMA, FIxA, EWxA/B, ECxA

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Corrective Maintenance Disconnecting CablesThe steps how to disconnect cables:1. Remove any cable ties.2. Detach the cable connector seal from

the module mechanics.3. Hold the cable with one hand and pull

the seal backwards with your other hand so that the connector is exposed.

4. If you are disconnecting an optical cable or a power cable, push the locking clips all the way down and pull simultaneously.

5. Pull the connector out carefully.6. If you are disconnecting an optical

transceiver, first turn the locking ring into a horizontal position and then pull the optical transceiver out.

Grip the connector seal by the stiffened end of the seal (the end connected to the connector) as shown in the following figure

The optical cable has a locking clip on the top of the connector, and the power cable has locking clips on either side of the connector

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Corrective MaintenanceReplacing Module Fans• The purpose is if a module fan fails or becomes degraded, replace it with a new

one.• In stack, wall, pole and Flexi Cabinet for Indoor (FCIA) installation, fans can be

replaced from the back of the module if there is enough space behind the BTS. • When removing fans from the back of FCIA, we need to remove the back panel. • When removing fans from the back, make sure we have a screwdriver that fits the

clearance. • If there is not enough space for replacing the fans from the back, you can also

replace the fans from the front. In this case you need to disable power to the module and pull it out from the casing or cabinet. In Flexi Cabinet for Outdoor (FCOA), fans are replaced from the front.

• Note that when replacing fans, an alarm indicating a broken fan may be seen. But after we have replaced the fan, the alarm is cancelled.

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Corrective MaintenanceReplacing Module Fans – for Dual TRX Module (EXxA) and Remote Tune Combiner Module (ECxA)

Note :Before start, shut down the module before replacing fans.Do not touch the rotating fans.

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Corrective MaintenanceReplacing Module Fans – for System Module (ESMA), System Extension Module (ESEA) and Power DC/DC Module 24V (FPDA)


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Corrective MaintenanceReplacing Module Fans – Optical Converter Module (EOCA)


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Corrective MaintenanceDisabling and enabling power with the Flexi EDGE BTS Manager

• We need to disable power from the Power Control dialog when adding modules to or removing modules from an operational BTS.

• The power control from the BTS Manager allows each power output to be controlled independently so that a single module can be added or removed.

• First disable the power to that output, add or remove the module, and then restore power.

Steps:1. After local BTS Manager connection has been setup, open the Power Control dialog (from

BTS Control | Power Control).2. If BTS is the Outputs Controller, click Change. 3. Click Turn Off to disable power from the modules needed.4. Perform the maintenance needed, for example,

add and remove modules.5. To enable power in the modules,

click Turn On for each unit.6. Click Change to change Outputs Controller to BTS.7. Click Close.

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Corrective MaintenanceReplacing Modules – Introduction

Purpose:• If a module fails and we have carried out troubleshooting,

replace the module with a new one.• The module needs to be removed also when we are replacing

a fan from the back of the module.• Before start, make sure the configuration-specific

instructions available for checking how to re-connect the cables.

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Corrective MaintenanceReplacing Modules – Dual TRX (EXxA)Note, If the Dual TRX Module carries the BCCH TRX or provides power for the Dual Duplexer Module, the whole sector may be disabled. In these cases it is recommended to block the sector.

General Procedure for replacing EXxA:•Disable power with Flexi EDGE Manager.•Disconnect cables and loosen the screw•Pull out the module and also EWxx (if there is) submodule

• Install the new EXxA module and also install Ewxx (if there is) in a new EXxA module

•Connect the cables and fix the screw•Enable the power and check functionality using Flexi EDGE BTS manager.

Please the slide notes for detail.Note that the Dual TRX Module is HW reset when the bus cables are removed and reconnected.

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Note, if the Dual Duplexer Module is connected to the Dual TRX Module which carries the BCCH TRX, the whole sector may be disabled. In this case it is recommended to block the sector.

General Procedure for replacing ERxA:•Disable power to EXxA connected to ERxA with Flexi EDGE Manager.

•Disconnect cables and loosen the screw•Pull out the module• Install the new one•Connect the cables and fix the screw•Enable the power and check the functionality using Flexi EDGE BTS manager.

Please the slide notes for detail.

Corrective MaintenanceReplacing Modules – Dual Duplexer (ERxA)Clic

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Corrective Maintenance Replacing Modules – System Module (ESMA)Note, save the site configuration file (SCF) to the PC's hard disk by selecting 'Fetch SCF from BTS' from the Commission menu before replace ESMA module

General Procedure for replacing EXxA:•Switch off power from the BTS•Disconnect power main breaker, other cables and loosen the screw

•Pull out the module, and also transmission submodule

• Install the new EXxA module and also install transmission submodule in a new ESMA module

•Connect the cables and fix the screw•Switch on the power and do commissioning using Flexi EDGE BTS manager.

Please the slide notes for detail.Note that the Dual TRX Module(s) and Remote Tune Combiner Module(s) are HW reset when the bus cables are removed and reconnected.

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Corrective MaintenanceReplacing Modules – Transmission Submodule

General Procedure for replacing Transmission submodule:

•Switch off power from the BTS•Disconnect cables on transmission submodule and loosen the screw

•Pull out transmission submodule• Install the transmission submodule •Connect the cables and fix the screw•Switch on the power of BTS and check the functionality using Flexi EDGE BTS manager.


CautionNew transmission sub-modules may be damaged and will not operate correctly if the sub-modules are replaced when the BTS power is switched on. Switch off the Nokia Flexi EDGE BTS before replacing the transmission sub-modules.

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Corrective MaintenanceReplacing Modules – Wideband Combiner (Ewxx)

General Procedure for replacing EWxx submodule:

•Disconnect cables on EWxx submodule and loosen the screw

•Pull out EWxx submodule • Install the EWxx submodule •Connect the cables and fix the screw•Switch on the power of BTS and check the functionality using Flexi EDGE BTS manager.


Note: block the TRXs connected to the EWxx with Nokia Flexi EDGE BTS Manager or, if the module is in a sector where Baseband or Antenna Hopping is used, block the whole sector.

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Corrective MaintenanceReplacing Modules – Remote Tine Combiner (ECxA)

General Procedure for replacing Remote Tune Combiner (ECxA):

•Disable power to Remote Tine Combiner Module and its connected EXxA module(s) with Flexi EDGE BTS Manager.

•Disconnect cables and loosen the screw•Pull out the module• Install the new one•Connect the cables and fix the screw•Enable the power and check the functionality using Flexi EDGE BTS manager.


Note: If the Remote Tune Combiner Module is connected to the Dual TRX Module which carries the BCCH TRX, the whole sector may be disabled. In this case it is recommended to block the sector.

Note that the Remote Tune Combiner Module is HW reset when the bus cables are removed and reconnected.

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Troubleshooting PrincipleTroubleshooting learning model

Personal

comfort

level

T I M E

UNCONSCIOUSLY UNABLE

CONSCIOUSLY UNABLE

CONSCIOUSLY ABLE

UNCONSCIOUSLY ABLE

AWARENESS

PRACTICE

APPLICATION

EXPECTATION AFTER COURSE

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Troubleshooting PrincipleTroubleshooting Style

Gambler

Tester

Thinker

Wanderer-random search

Risk Taker-experimental search

Odds maker-guess the fault

Swapper-change all

Sensor-look, listen, touch and smell

Tracer-follow diagram

Splitter- “divide and conquer”

Reader-use documents

Recaller-good memory

Designer-theoretical knowledge

Analyser-think before act

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Troubleshooting PrincipleTroubleshooting Questions

When analyzing the problem, you might want to ask yourself the following questions:• When was the problem first reported?• How did the problem become known?• From which geographical area was it first reported?• Are there similar complaints coming from other cells?• Is the problem spreading in the network or is it happening only in one/few

BTSs?• Which types of calls are affected?• Does it happen all the time or occasionally?• …

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Troubleshooting PrincipleBrainstorming

What comes up in your mind when you read the questions?Collect everything together at the board.

What kind of documents

could help me in troubleshooting?

Which people could help me in troubleshooting?

What kind of alarms could

help me in troubleshooting?

Which hard- and software could

help me in troubleshooting?

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Troubleshooting Process

Find the symptoms of the problem

Assumptions

Analyze and verify the problem

Carry out corrective action

Make sure the problem has been solved

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Troubleshooting ProcessFind the symptoms of the problem

• Symptoms are indication that represent problem might happen in the system.

• Symptoms also can help user to approach and identify the cause of the problem.

• For Flexi EDGE BTS, user can find the symptoms of the problem such as:– Alarms appear in the BSC and/or BTS (using BTS Manager)– Message appear when executing a task with BTS Manager, e.g: MIV

message box– Reporting result, e.g: commissioning report, test result.– Experience of the mobile user

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Troubleshooting ProcessFind the symptoms of the problem

Error messageLED Indication

Alarm in BTS Manager

Alarm comes to BSC

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Troubleshooting ProcessMake assumption

• Based on symptoms, user can make assumption of what happened actually in the equipment, what the probably cause of the problem, and also how to solve it.

• Making assumption is very important, due to:• Can be used for directing what should be done in order to approach

the problem• Reduce the time of troubleshooting, if the problem has been

experienced before.

• Assumption can be more than one.• There could be that the assumption is not right (false), but

after the verification/analysis process, user can prove it.

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Troubleshooting ProcessMake assumption – example

• For example, during local connection with Flexi EDGE BTS Manager, comes up this following message:

• So, what is your assumption due to:– Problem might occur later on?– Cause of the problem?– How to solve it?

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Troubleshooting ProcessAnalyze and verify the problem• After make assumption, then user can start to analyze and verify what he/she

assume. In this process actually need the troubleshooting skill.• These tools could help user to identify the problem when do troubleshooting:

• Software tools: – Flexi EDGE BTS Manager, includes testing process, monitoring & supervision– Flexi Hub Manager– Latest Flexi EDGE BTS SW Package

• Hardware tools: – Personal Computer– Basic tools: multimeter, wrench– Handset + SIM card for call testing– Spare equipment : units, cables, connector– Advance measurement tool: site master, spectrum analyzer

• References:– Product Documentation– SW Package documentation– Technical Notes– Generic Failure Report

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Troubleshooting ProcessAnalyze and verify the problem using BTS Manager

• If a fault occurs during BTS operation, connect Nokia Flexi EDGE BTS Manager laptop PC to the System Module (ESMA).

• These elements could help you identify the problem when do troubleshooting:– Flexi EDGE BTS Manager windows, – Supervision, – BTS Events, – and Alarms

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Troubleshooting ProcessAnalyze and verify the problem using BTS Manager

Alarms

BTS Events

Supervision

Flexi Edge BTS Manager Window

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Troubleshooting ProcessAnalyze and verify the problem – define the caused

Find the caused problem:Depending on the problem, one or more following causes may be as type of problem:

CommissioningElectrical powerNokia Flexi EDGE BTS Manager connectionDual TRX Module (EXxA) operationTRX test and TRX loop test failuresIllegal modulesLocal software download from Flexi EDGE BTS Manager(E)GPRS packet switched data transferQ1 managementPseudoWire operation

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Troubleshooting ProcessAnalyze and verify the problem – replacing unitIf replacing unit needed, after having replaced the faulty module/unit, send it to hardware service.These following items should be provided when returning the faulty unit:

Exact failure details, such as the alarm number, environmental informationConfiguration information (such as dusty, hot SITE, large configuration)Exact alarm description for all modules. Except for the EXxx DTRX modules, are capable of recording internally to nonvolatile memory the fault condition, including the environmental information and TRX-level configuration information in case a blocking alarm has occurred.

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Troubleshooting ProcessAnalyze and verify the problem – failure reportIf a fault still exists after troubleshooting, contact your local Nokia Siemens Networks representative.

Report all damages, failures, or faults to Nokia Siemens Networks using the Failure Report Form (FRF) that your local Nokia Siemens Networks representative has provided.

Note : example of returning faulty unit form is as attached:Failure report

template

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Problem symptoms for Troubleshooting BTS alarm in BSC (1/2)• Nokia Flexi EDGE Base Station alarms issued at the BSC or NetAct have

a four-digit alarm number and an alarm name, and an optional fault reason (see the figure below).

• To interrogate BTS alarm in BSC, use MML command: ZEOL• For other fields in the figure below, refer to BSC/TCSM Product

Documentation.

Severity/ urgency level*** requires immediate actions** requires actions during working hours* no actions required

MML command under BSC to interrogate the current BTS alarm under BSC number 99

Alarm number

BSC name

Printout type:

BCF numberTRX number

BTS number Event type

COMM communication failureQUAL quality of servicePROCES processing failureEQUIPM equipment failureENVIR environmental failure

Date TimeDate

ALARM fault situationCANCEL fault terminatedDISTUR disturbanceNOTICE notice

Consecutive alarm number

A short description of the alarm.Supplementary information

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Problem symptoms for Troubleshooting BTS alarm in BSC (2/2)

• Please note that one alarm can have more than one fault reason, although the alarm number remains the same.

• Different faults may have the same effect on the operation of a base station object, which is why they have the same alarm number and name.

• The fault reason specifies the fault and helps in troubleshooting.

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Problem symptoms for Troubleshooting BTS alarm in Flexi EDGE BTS Manager

Alarm generation real Time stamp

The current event of alarm

Description of alarmStart – Indicates that an alarm has been started. Cancel - Indicates that an active alarm has been cancelled In alarm history option, there will be:Transient – Indicates that a transient (disturbances) alarm has occurred.

Description of alarm By selecting a specific alarm, there will be further explanation in alarms details box

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Problem symptoms for Troubleshooting Alarm Classification (1/3)

• In fault situations, Nokia Flexi EDGE Base Station runs an automatic reclassification procedure for major (**) and critical (***) alarms before it sends an alarm to the BSC.

• When an object becomes faulty, only one critical (***) alarm from a BCF/BTS object or only one major (**) alarm from a faulty TRX can be active at a time.

• In reclassification, the alarm handling detects which logical base station object is affected by a module level fault.

• After reclassification, only one object level alarm with only one fault reason is sent to the BSC.

• However, the same alarm can be caused by several different fault reasons.

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BCF BTS 1 TRX 1

TRX 2

TRX 3

TRX 4

BTS 1

Fault situation 1:Alarm Output

7606 TRX FAULTY (TRX 1)

BCF BTS 1 TRX 1

TRX 2

TRX 3

TRX 4

BTS 1

Fault situation 2:

Alarm Output, in this order7606 TRX FAULTY (TRX 1)7603 BTS FAULTY (BTS 1)

Functioning object

Degraded object

Faulty object

1. TRX 1 becomes faulty and ceases to operate. 7606 TRX FAULTY alarm is issued.


2. TRX 2 becomes faulty and ceases to operate.3. Now both TRXs are not operating, which causes BTS 1

cease to operate. A BTS alarm, 7603 BTS FAULTY, is issued.

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BCF BTS 1 TRX 1

TRX 2

TRX 3

TRX 4

BTS 1

Fault situation 3:Alarm Output7606 TRX FAULTY (TRX 1)7604 BTS OPERATION DEGRADED (BTS 1)

BCF BTS 1 TRX 1

TRX 2

TRX 3

TRX 4

BTS 1

Fault situation 4:Alarm Output, in this order7607 TRX OPERATION DEGRADED (TRX 1) start7607 TRX FAULTY (TRX 2)7607 TRX OPERATION DEGRADED (TRX 1) cancel7607 BTS OPERATION DEGRADED (BTS 1)

Functioning object

Degraded object

Faulty object


2. TRX 2 becomes partially faulty but calls are getting through.

3. Now the sector is partially faulty, and a BTS alarm, 7604 BTS OPERATION DEGRADED, is issued.

1. TRX 1 becomes partially faulty but calls are getting through. 7607 TRX DEGRADED alarm is issued.

2. TRX 2 becomes faulty and ceases to operate. 7606 TRX FAULTY alarm is issued for TRX 2. 7607 TRX DEGRADED alarm is cancelled for TRX 1.

3. Now the sector is partially faulty and a BTS alarm, 7604 BTS OPERATION DEGRADED, is issued.

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Problem symptoms for Troubleshooting Alarms Tables (1/2)• The alarm tables show the faults and instructions on how to correct the fault (see

an example of an alarm table below):• Description of fields in the alarm table is shown below:

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Problem symptoms for TroubleshootingAlarm Tables (2/2)

Instruction of troubleshooting activity in order to rectify the problem caused by specific fault reason

Fault reasonHow user can cancelling the alarm

Same alarm number can have different fault reason, instruction and how to cancel it

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Problem symptoms for TroubleshootingAlarm based on object

Object

Alarm Title & Severity

Faulty(Critical)

Operation Degraded

(Major)Notification

(Minor)

BCF 7600 7601 7602BTS 7603 7604 7605TRX 7606 7607 7608Site Powering 7612 7613 7614

Other alarms:• 7208 LOCAL BLOCK• 7401 – 7424 EXTERNAL ALARM• 7615 RTS IN TEST USE• 7616 OSCILLATOR ADJUSTMENT TEMPORARILY INTERRUPTED• 7621 INTOLERABLE CONDITIONS ON SITE • 7801 MMI CONNECTED• 7995 MAINS BREAKDOWN WITH BATTERY BACK-UP\• 8xxx TRE related alarms

Alarms based on Radio Network Objects & Site Powering

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Problem symptoms for TroubleshootingIdentifying faulty modules

• In the Alarms window of Nokia Flexi EDGE BTS Manager, you can see the object that the alarm refers to in the Object column.

• When troubleshooting the alarm at the site, follow the troubleshooting instructions in Nokia Flexi EDGE BTS Trouble Management.

• It is not always the alarming module that is faulty, it may also be the connected cable or the interworking module that causes the alarm.

• At the site, you can easily locate the alarming module by checking the colour of the LED.

• Depending on the unit, a fault can be indicated by a red LED, a blinking red LED or, in some cases, a blinking yellow LED.

• If the module does not have a LED (for example the Wideband Combiner sub-module EWxx) or the module is not responding and no LED colour is displayed, read carefully the alarm description to locate the module causing the alarm.

• For identifying a faulty transmission sub-module connected to the Q1 bus and its alarms, follow the troubleshooting instructions in the sub-module product documentation.

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Problem symptoms for TroubleshootingLED in Units - System Module (ESMA)

StatesBTS

OM not runnin

g

Platform

StartupAuto

Detect Comms Wait for LAPD

BCF_SW Loading

BCF Configuring

BCF Supervisory

Background SW Loading BCF

ResetOMUSIG on

OMUSIG off

OMUSIG on

OMUSIG off

OMUSIG on

OMUSIG off

OMUSIG on

OMUSIG off

BCF Highlight SR BY CC CC CC CC CC CC CC CC CC CC CC SR

Alarm BCF Critical

SR BY SR SR SR SR SR SR SR SR SR SR SR SR

Alarm BCF Major

SR BYBR BR BR BR BR BR BR BR BR BR BR SR

Alarm TRS Critical

SR BY SY SY SY SY SY SY SY

Same Priority as BCF Alarms

SR

Alarm TRS Major SR BY SY SY SY SY SY SY SY SR

Local_Mode SR BY BY BY N/A N/A N/A BY BY SG N/A N/A BG SR

BCF OBJ Lock SR BY SY SY SY SY SY SY SY SY N/A SY SY SR

BCF OBJ Block SR BY N/A N/A N/A N/A N/A N/A N/A SY SY SY SY SR

Normal SR BY BY BY BY BG SY SY SY SG SG BG SG SR

Colour Explanation

SR = Stable Red

BTS_OM SW is not runningBCF/TRS critical alarm (except during platform startup), orBCF reset

BR = Blinking Red

BCF/TRX major alarm (except during platform startup or BCF reset)

SY = Stable Yellow

BCF is locked (except during platform startup or BCF reset)Normal mode: BCF SW is loading (OMU signal off); BCF is configuring (OMU signal off)Blocked BCF: BCF is in supervisory mode or background SW loading

BY = Blinking Yellow

Platform startupNormal mode: auto detection in progress; BCF is commissioning or waiting for LDAP; BCF is configuring (OMU signal on)Local module: auto detection in progress; BCF is commissioning or configuring

SG = Stable Green

Normal mode: BCF is in supervisory mode; BCF background SW is loading (OMU signal off)Local mode: BCF is in supervisory mode

BG = Blinking Green

Normal mode: BCF SW is loading or background SW is loading (OMU signal on)Local mode: BCF background SW is loading

CC = Cycling colour

BCF Highlight

N/A Not Applicable

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Troubleshooting Problem Situations

Problem situation that needs troubleshooting effort can be divided into following:

• Commissioning• Electrical power• Flexi EDGE BTS Manager connection• Dual TRX Module (EXxA) operation• TRX test and TRX loop test failures• Illegal modules• Local software download from Flexi EDGE BTS

Manager• (E)GPRS packet switched data Transfer• Q1 management• PseudoWire operation

Troubleshooting problem situation

Each of them has Potential Cause and Corrective Action tables that explained in Trouble Management of Nokia Flexi EDGE BTS document in NED

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Flexi EDGE BTS Trouble ManagementExample cases

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List of cases

Case 1:MIV MessageCase 2:Commissioning partial failed due to test reporting failedCase 3:Alarm 7606 when power reset given to split DTRX moduleCase 4:Rx Diversity is not tested when apply to TRX testingCase 5:TRX test failed in BSCCase 6:EDAP is missing from the Abis Allocation view after modifying the TCH allocationCase 7:External alarm input 24 doesn’t appear using FSEB

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List of cases

Case 7:External alarm input 24 doesn’t appear using FSEBCase 8:Alarm 8179 FAR END Alarm is raised in the BSCCase 9:TRX Faulty alarm : EXxx TRX module has lost connection to ERxx DDU moduleCase 10:TRX Testing failed after RecomissioningCase 11:TRX test is failedCase 12:Alarm 7607 - Frequency band mismatch between commissioning fileCase 13:RSSI detected Rx signal difference exceeding thresholdCase 14:RSSI measurement results are lost when the alarm is cancelled

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Case 1:MIV Message

Detail of the case• When user access the Flexi EDGE BTS locally,

comes the Management Interface Mismatch message.

• But after click on yes button, user can use as usual• Advise needed according to:

– What is the root cause ?– What are the possible impact if user still go on?– How to fix this problem

Product / SW ReleaseNokia Flexi EDGE BTS / EP1.1 CD1.0

Impact • -

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Case 2:Commissioning partial failed due to test reporting failed

Detail of the case• At the end of commissioning step, there comes up message as follow:

Commissioning has partially failed due to following:

One or more commissioning test failed.

See commissioning report for details

• There’s also red dot on TRX test in commissioning progress step

Product / SW ReleaseFlexi EDGE BTS EP1.1 CD.1.0

Impact • Flexi EDGE BTS cannot be used because of not

commissioned properly

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Case 3:Alarm 7606 when power reset given to split DTRX module

Detail of the case• Operator configures the Flexi EDGE BTS with 3 +3

configurations this following specification:– three DTRXs are provided,

– one DTRX is splitted to serve two sectors and both TRX are BCCH-TRX.

• When the power on DTRXs where both BCCH-TRX are there turn off using PDU control, then the BCCH on both sectors are reconfigured to other TRX objects as expected.

• However, when the power to the DTRX module is switched back on, alarm 7606 TRX Faulty 'ERxx DDU module has detected no Tx power at TxB input' is activated.

• Even though the traffic still can be there

Product / SW ReleaseFlexi EDGE BTS / EP1

Impact • No impact to traffic

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Case 4:Rx Diversity is not tested when apply to TRX testing

Detail of the case• TRX testing is result is PASS, but no Rx diversity testing

is performed (NOT_TESTED).

• Commissioning report and cabling have been checked, and they are ok.

Product / SW ReleaseFlexi EDGE BTS / EP1.1 CD1.0

Impact • No impact to traffic, but the Rx Diversity testing result

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Case 5:TRX test failed in BSC

Detail of the case• When the TRX Test is run from BSC (remotely), it fails. • 7735 – TRX TEST FAILED alarms also in the BSC.• When user does TRX testing locally using BTS

manager, the result is okay.

Product / SW ReleaseFlexi EDGE BTS / EP1.0

Impact • No impact to traffic, but misleading troubleshooting could

happen due to 7735 TRX test failed alarms.

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Case 6:EDAP is missing from the Abis Allocation view after modifying the TCH allocation

Detail of the case• Operator modified TCH allocation in the transmission link that has EDAP

and sent to the BTS from the BTS manager.

• Once the allocations are retrieved from the BTS with the BTS manager it has been observed that the EDAP is missing from the Abis Allocation view.

• Alarm 7730 -“Configuration of BCF failed”, with supplementary information detail 15844d: “EGPRS_BTS_TRXS_NOT_IN_DAP_EC GPRS enabled TRX is not attached to Dynamic Abis Pool, when GPRS is enabled in the BTS”


Impact• The affected Sector will remain in BL-SYS state until the

problem is resolved.

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Case 7:External alarm input 24 doesn’t appear using FSEB

Detail of the case• In order to have 13 up to 24 external alarm inputs, operator must provide

FSEB unit to be connected to ESMA in Flexi EDG BTS.

• To check the functionality of FSEB unit, user must create external input alarm in the BSC for external alarm 13 up to 24.

• During the external alarm testing, operator finds that even though FSEB has been installed, but they cannot see the alarm for 24 that they have created.

• Cable connection has been checked, and didn’t find any problems, and also there’s no alarms related to the FSEB

Product / SW ReleaseBSCi / S10.5 ED

Impact • Operator cannot use the external alarm 13 -24

Problem TypeBSCi / S10.5 ED

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Case 8:Alarm 8179 FAR END Alarm is raised in the BSC

Detail of the case• 8179 FAR-END ALARM is raised in the BSC

• All LapD links are failed

• BCCH is missing


Impact • Since LapD links failed, no calls can be provided

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Case 9:TRX Faulty alarm : EXxx TRX module has lost connection to Erxx DDU module

Detail of the case• Two kind of alarms come in the Flexi BTS manager:

– TRX Faulty alarm : EXxx TRX module has lost connection to Erxx DDU module for TRX 2 & TRX 3 (ERxA1)

– BTS Faulty alarm : EXxx TRX module has lost connection to Erxx DDU modules Sector 1 (ERxA1)

• What is the cause of these alarms?


Impact • No traffic can be handle by TRX2 & TRX3.

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Case 10:TRX Testing failed after Recomissioning

Detail of the case• After recommissioning a Flexi EDGE BTS, operator find that the result of

this APPEND commissioning is successful, but without testing is performed.

• In order to complete the reporting, TRX testing is performed. In here operator found that TRX testing for TRX-1 is failed due to RF RX cable No connection.

• No alarms accordingly appear in alarm window.

• Physical checking on the RF cabling has been done, but no found problem there.

• Snapshot of APPEND commissioning and TRX testing result are attached

Product / SW ReleaseFlexi EDG BTS / EP 1.1

Impact • TRX test is failed

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Case 11:TRX test is failed

Detail of the case• When the TRX test is performed for TRX-1, the result of

the test is failed.

• There are also alarm TRX Faulty: Erxx DDU module has detected no Tx power at TAxA input for TRX-1 & TRX-3

Product / SW ReleaseFlexi EDGE BTS EP1.1 CD.1.0

Impact • TRX test is failed

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Case 12:Alarm 7607 - Frequency band mismatch between commissioning file

Detail of the case• Alarm 7607 TRX Operation Degraded - Frequency

band mismatch between commissioning file and detected hardware raise.

• This alarm rises when operator use this following configuration:– 3+3+8 configuration with ESEA– High gain MHA types in use for all DTRX– DTRX-1 up to 6 are EXDA (1800 MHz) – DTRX-7 up to 14 are EXGA (900 MHz)


Impact • -

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Case 13:RSSI detected Rx signal difference exceeding threshold

Detail of the case• Alarm 7604 BTS Operation degraded and 7607 TRX Operation

Degraded – RSSI detected Rx signal difference exceeding threshold are appeared in the BSC.

Product / SW ReleaseFlexi EDGE BTS/ EP 1.1

Impact • TRX Operation Degraded

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Case 14:RSSI measurement results are lost when the alarm is cancelled

Detail of the case• After maintaining the Antenna problem the caused Alarm

7607 TRX Operation Degraded, “RSSI detected Rx signal difference exceeding threshold”, the alarm is automatically cancelled.

• The problem is, once it’s cleared, the alarm details are cleared from the RSSI Comparison Values and Site Information report.

• How can user get the historical reason alarm later on.


Impact• If the RSSI alarm is cancelled before the RSSI results are

read, it is difficult to find the reason for the alarm later on.

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Flexi EDGE BTS TroubleshootingAppendix:• LED in Units• Troubleshooting Problem Situation• How to find the reference of Flexi EDGE BTS in NOLS

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LED in Units

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Problem symptoms for TroubleshootingLED in Units - FIPA & FIEA

Colour ExplanationDark Power off

SR = Stable Red Interface card has power but it is not detected

SG = Stable Green Interface card is detected by the System Module

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Problem symptoms for TroubleshootingLED in Units - FIFA

Colour ExplanationSR = Stable Red One or more data lines are not operating correctly, or

The fault is in the indoor unit, outdoor units, or far-end units.

SY = Stable Yellow The indoor unit, outdoor units, or far-end units have active alarm(s). (LED will be stabilized for alarm status in about 30s after power on) The data is transmitted in this configuration, but may not be transmitted in other configurations or if another failure occurs. The overall performance capability is reduced., orSW boot (LED is yellow only during the first second after power on. Afterwards LED blinks all colours during application SW startup).

SG = Stable Green Both terminals over this hop are operating normally and no alarms are activeA blinking green LED indicates that there is a connection to the node manager

All color blinking Application SW startup

FIFA main status LED indications

Colour ExplanationDark Power off

SR = Stable Red DC power feed to the outdoor unit active, Tx signal not active

SG = Stable Green DC power feed to the outdoor unit and Tx signal active

FIFA Flexbus status LED indications

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Problem symptoms for TroubleshootingLED in Units - EXxA

Colour Explanation

SR = Stable Red • The O&M software of the module is not running, or• 7606 alarm (TRX faulty) is active on both carriers.

BR = Blinking Red • 7606 alarm (TRX faulty) is active on one carrier, or• 7607 alarm (TRX operation degraded) is active on one or both carriers.

SY = Stable Yellow • Both carriers in the TRX module are blocked/locked from EM/BSC, or• Both carriers in the TRX module are shutdown from BSC, but TRX module is still providing power and control for an ERxA, or• Both carriers in the TRX module are shutdown from BSC, but TRX module is powered following a reset of ESMA or ESEA module, or• Both carriers in the TRX module have LAPD on TRXSIG channel disconnected when the carriers state is supervisory, or• One carrier is not in supervisory state but other carrier is in supervisory state with LAPD on TRXSIG channel disconnected.

BY = Blinking Yellow • TRX_OM SW state is in TRX_Started State, or• TRX_OM SW state is Clock sync, or• One or both carriers are configuring:

– Wait for LAPD establishment, or– Wait for system information

• One or both carriers have LAPD on TRXSIG channel disconnected when none of the carriers are in state supervisory.

SG = Stable Green • Both carriers are in state supervisory and no 7606 or 7607 alarms are active and LAPD on TRXSIG is connected to both carriers.

BG = Blinking Green • Only one carrier is in state supervisory and no 7606 or 7607 alarm is active and LAPD on TRXSIG is connected for this carrier, or• Both carriers are in state supervisory but one carrier has LAPD on TRXSIG channel disconnected.

CC = Cycling colour • The user has pressed the "Highlight" button on the BTS Manager.

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Problem symptoms for TroubleshootingLED in Units - ERxA

Colour Explanation

SR = Stable Red Dual Duplexer Module software is not running, orMajor alarm (on both antenna paths)

BR = Blinking Red Minor alarm (on one or both antenna paths), orMajor alarm (on one antenna path)

BY = Blinking Yellow SW start-up or configuration ongoing

SG = Stable Green Module operational (cell can be locked in BSC)

BG = Blinking Green Module is loading software

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Problem symptoms for TroubleshootingLED in Units - ECxA

Colour Explanation

SR = Stable Red RTC SW is not runningAlarm is active with class critical (***) and RTC is disabled (all cavities are disabled).RTC module internal HW failureNo Tx power coming to RTC antennaRTC antenna broken, VSWR, orMHA current threshold crossed:• If MHA bypass is disabled:

–There is a major alarm (7607) on other MHA (if the diversity is ON) –The diversity is OFF

BR = Blinking Red Alarm is active with class major (**) and RTC is still enabled (at least one of the cavities is enabled).RTC Antenna degraded, VSWR, orMHA current threshold crossed:• If MHA bypass is enabled• If MHA bypass is disabled:

–There is no alarm on other MHA

BY = Blinking Yellow RTC SW is in the startup sub-states: Initial boot loader, Wait for external input, software downloading, Initialization and hardware tests or RTC configured

SG = Stable Green Module is in supervisory state and no major or critical alarms are active

CC = Cycling colour EM has requested indication for RTC and timer is still running

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Problem symptoms for TroubleshootingLED in Units - ESEA

Colour Explanation

SR = Stable Red System Extension Module is switched on and SW is not yet running

BR = Blinking Red After startup the POST test has failed orinvalid module connection

SY = Stable Yellow Not used. Although this is not used the colour/frequency can be set for testing purposes

BY = Blinking Yellow Not used. Although this is not used the colour/frequency can be set for testing purposes

SG = Stable Green After startup the POST test was successful. Module is configured and is supervisory

BG = Blinking Green SW upgrade is running

CC = Cycling colour BTS Manager has requested indication for System Extension Module and timer is still running

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Problem symptoms for TroubleshootingLED in Units - EOCA

Colour Explanation

SR = Stable Red Any alarm active except for overcurrent alarm

BR = Blinking Red Overcurrent alarm active in one output (no other alarms active)

SY = Stable Yellow Startup state. LED is changed in this state after receiving first capability request.

SG = Stable Green Supervisory state. This is default state for the LED. Led is changed into green after receiving second status and control request from System Module

CC = Cycling colour EM has requested indication for Optical Converter Module and timer is still running.

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Troubleshooting Problem Situation

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POTENTIAL CAUSE CORRECTIVE ACTION

Troubleshooting Problem Situations Commissioning (1/3)

• Failed Commis-sioning

Commissioning

Wrong PIU type, an error message ("Invalid Parameter TRE_NE1/TRE_NE: piuType -Errors in SCF") is displayed

Error message 'Expected tag is missing FILE :::scope' pops up when sending SCF to BTS

Check that the PIU type contained in SCF is the same as inserted to the system box

BTS Manager is not compatible with BTS SW. Use the same version of BTS Manager as the BTS SW is.

• Partially failed commis-sioning

Wrong BCF ID.Check the troubleshooting instructions for the 7601 alarm

BCF OPERATION DEGRADED 'Commissioning failed due to BCF ID mismatch between Commissioning file and BSC'.

One of the configured TRXs is missing

Check the troubleshooting instructions for the 7606 alarm TRX FAULTY, 'ESMA System module has lost connection to EXxx TRX module'.

TRX commissioning test failure.

Check the troubleshooting instructions for TRX test failures.

Power cable test failure.Check that the power cables are correctly mated. Check

the condition of cables and connectors.Check the troubleshooting instructions for the 7601 alarm

'Module power cable connections are incorrectly configured'.

Error occurred in bringing TRS into use.

Check that the transmission submodule (FIxA) settings match those in the SCF file.

Replace the faulty FIxA transmission sub-module.

The TRX and Remote Tune Combiner Module (ECxA) or Dual Duplexer Module (ERxA) do not match.

Check the troubleshooting instructions for the 7606 alarm TRX FAULTY, 'Hardware incompatibility detected during EXxx TRX module configuring'.

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Troubleshooting Problem SituationsCommissioning (2/3)

Commissioning

.

.

. Ctd

The TRX band in the HW report does not match the one in BTS_CONF_DATA

(from the BSC).

Missing OMUSIG.

Check the troubleshooting instructions for the 7606 alarm TRX FAULTY, 'Hardware incompatibility detected during EXxx TRX module configuring.'

• Check that the BCF has been created at the BSC.• Check that the transmission chain from the BSC to the

BTS is correctly configured and no alarm(s) exists.• Check that the transmission cable is correctly

connected to the transmission sub-module (FIxA).• Check that the OMUSIG allocation in the BSC

matches the one in the SCF file.• Check that the OMUSIG is correctly cross-connected

in the transmission sub-module (FIxA).• If FIFA transmission sub-module is used, check the

radio hop condition.• If FIQA or FIYA transmission submodule is used in

PWE mode, check if the PW configuration, the BTS and the Far-end PW device match.

• Check in the PWE Tunnel Settings if the Peer Status is Reachable. It is recommended to use the Monitor PWE

• function during commissioning, in order to check the PW configuration.

• Partially failed commis-sioning … ctd

The BSC did not complete all commissioning tests within 130 seconds (as indicated by the commissioning report partial failure reason 'Commissioning test timer expired').

• Run manual commissioning tests from the Flexi EDGE BTS Manager to confirm the correct operation of TRXs that were not tested automatically.

• Run Abis Loop tests from the BSC to confirm the network connection between the BSC and the BTS.


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Troubleshooting Problem Situations Commissioning (3/3)

Commissioning

.

.

. Ctd

In PWE mode, a PW is used as a synchronization source and the adaptive clock recovery state has not reached Tracking state within 13 minutes.

• If the clock recovery state of the synchronization source has reached Acquisition state, the clock recovery state will most likely eventually reach the Tracking state after a few more minutes. The BCF will then reach Supervisory state without any further interaction.

• .The network conditions of the packet switched network may prevent the BTS from successfully reaching the Tracking state. It is recommended to use the Monitor PWE feature during commissioning to validate if the network conditions allow the use of adaptive clock recovery. If the network conditions are not sufficient for the adaptive clock recovery, an alternative synchronization source must be used.

• .It is recommended to use the Monitor PWE function during commissioning, in order to check the state of the adaptive clock recovery algorithm. The SCF should only be sent when the Tracking state has already been reached to prevent failed commissioning.

• Partially failed commis-sioning … ctd

PCU synchronization not achieved on

GPRS timeslot.

• Verify the Abis allocations are correct.• Issue a TRX reset, or lock/unlock or block/deblock to

trigger a TRX reset.


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Troubleshooting Problem SituationsElectrical Power

• No power to Nokia Flexi EDGE BTS

ELECTRICAL POWER

Site mains power supply fault (all LEDs are off).

Wrong DC voltage polarity in System Module (ESMA) input.

• Turn the mains switch on.• Check the site mains power source and fuses.

• Change polarity.

A defective mains power cable. • Replace the power cable.

A defective DC Power Distribution Submodule (FEPD) in the System Module (ESMA): the System Module LED is red or off).

• A single power port or all power ports may be faulty. Replace the System Module.

• A red LED may also indicate that the System Module is overheated. Check the site’s ambient temperature and active fan alarms.

Short circuit in one of the modules.

• Replace the faulty module.• Note that the Power Distribution Submodule (FEPD)

has short circuit protection, and only the faulty module is off. The other modules have 48 V and are working normally

The input 48 V DC voltage varies outside the acceptable range. The Dual TRX Modules are switched off. When the situation is restored, they are again switched on.

If this occurs recurringly, inspect the current feeding capacity of the power supply. It may be underestimated, and requires an enhancement.

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Troubleshooting Problem SituationsFlexi EDGE BTS Manager Connection

• Cannot establish a connection between the System Module (ESMA) and Nokia Flexi EDGE BTS Manager

Flexi EDGE BTS Manager Connection

Wrong BTS IP address.

Wrong BTS TCP port.

Check that the correct BTS IP address is specified in Nokia Flexi EDGE BTS Manager. The BTS IP address for a local connection is 192.168.255.131.

Check the IP address of the PC's LAN card.The address should be in the same subnetwork as the

BTS IP address.Example: if the BTS IP address is 192.168.255.131, the

PC IP address could be 192.168.255.130.The LMP cable is broken

or not properly connected.

Check that the cable has been connected to the LMP port of the System Module (ESMA). Replace or repair the cable.

Old or incorrectly installed Nokia Flexi EDGE BTS Manager SW.

Use the same or a newer version of Nokia Flexi EDGE BTS Manager SW compared to the BTS SW.

(Re)install Nokia Flexi EDGE BTS Manager SW.

A faulty or damaged System Module.

Power cycle the System Module.Replace the System Module.

All IP traffic is routed through the dedicated VPN gateway

Disable VPN or allow IP traffic including BTS Manager IP traffic to go to other gateways than the VPN gateway.

Transmission sub-module not correctly inserted or broken.

Check if the transmission sub-module is fully inserted.

Replace the transmission sub-module.

LMP cable changed to another System Module at the site.

The ARP routing table on the PC needs to be refreshed with the new MAC address. There are three alternative actions:

. Execute the DOS command arp –d 192.168.255.131 to clear the old BTS's MAC address from the PC's operating system. This may require administrator privileges to complete successfully.

. Disable and re-enable the Local Area Connection from the PC's operating system, or

. Wait from ten seconds to a couple of minutes until the operating system automatically refreshes the ARP routing table.

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Troubleshooting Problem SituationsDual TRX Module (EXxA) Operation

• Dual TRX Module is not operating correctly

EXxAOPERAT ION

Objects are locked from the BSC, NMS/ 2000 or NetAct.

Objects are blocked from Nokia Flexi EDGE BTS Manager..

• Request the state from the BSC or NetAct.• Request an unlock from the BSC or NetAct.

Unblock the object using Nokia Flexi EDGE BTS Manager.

Dual TRX Module is not properly connected, no electric power, or the LED is broken (the front LED does not light up).

• Check the power cable connections between the System Module (ESMA) or the System Extension Module (ESMA) and the Dual TRX Module.

• Check all RF cable connections between the Dual TRX Module and the Dual Duplexer Module (ERxA), Wideband Combiner Sub-module (EWxA) or Remote Tune Combiner Module (ECxA).

• Check the instructions in Troubleshooting electrical power.

• Replace the Dual TRX Module.Dual TRX Module is not

properly connected, no electric power, or the LED is broken (the front LED does not light up).

Check if the 7601 'Module power cable connections are incorrectly configured‘ alarm is active and follow the related troubleshooting instructions, if needed.

After the TRX/BTS/BCF reset, it takes one hour to activate the 7606 'EXxx TRX module Tx power is less than minimum at DPC' alarm for the traffic channel (TCH) TRX.

Follow the troubleshooting instructions for the alarm.

Active alarm on TRX. Check the alarm-specific troubleshooting instructions

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Troubleshooting Problem SituationsTRX Test and TRX Loop Test failures (1/3)

• TRX test run from the BSC (S12)

TRX TEST & TRX LOOP TEST FAILURES

TRX TEST fails with BSC default threshold values

There are two alternative steps:• Adjust the threshold on the BSC as described above.• Re-run the TRX test from (remote) BTS Manager.

'High power in Abis1- Air3 loop'

• Replace the Dual TRX Module.• Replace the Dual Duplexer Module or the Remote

Tune Combiner Module.

'Failure due to Forced Reset' • . Wait until the module recovers from the reset.• . Run the TRX (loop) test again.

• TRX test run from the Flexi EDGE BTS Manager is failed

'Low BCCH Power levels' • . Check all RF cabling between the Dual TRX Module and the Dual Duplexer Module or the Remote Tune Combiner Module.

• . Replace the Dual TRX Module.• . Replace the Dual Duplexer Module or the Remote


'Failure due to Forced Reset' • . Check all RF cabling between the Dual TRX Module and the Dual Duplexer Module or the Remote Tune Combiner Module.

• . Replace the Dual TRX Module.• . Replace the Dual Duplexer Module or the Remote

Tune Combiner Module.'Failure due to TRX

reconfiguration' . Run the TRX (loop) test again..

'Timeslot is busy'

Wait until the timeslot is free or run the test again on a different timeslot.

The timeslot and its offset timeslot (-3) must both be free before the test can be run.

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TRX TEST & TRX LOOP TEST FAILURES … Ctd

'Bad channel configuration'Find free non-BCCH/non-SDCCH timeslot, and run the

test again.

'Invalid AGC'

Reset the BCF.Note that this does not indicate a hardware

error – do not replace module(s).

• TRX test run from the Flexi EDGE BTS Manager is failed … Ctd

'Channel mode is neither PS nor CS'

'Failed to set/clear air loop point as invalid path information'

'Failed to clear air loop point as TS already free'

'No response for block request for a timeslot'

'Not able to set the loop point on connected DDU/RTC or on ABIS within the predefined time'

'No ARFN passed in loop command in configuring state'

'Phase loop lock (PLL) has alarm on it'

'Failure in setting air loop point as DDU synthesizer not able to achieve Lock state'

Replace the Dual Duplexer Module or the Remote Tune Combiner Module.

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TRX TEST & TRX LOOP TEST FAILURES … Ctd

'Failure due to high bit error ratio' • Check all RF cabling between the Dual TRX Module

and the Dual Duplexer Module or the Remote Tune Combiner Module.



'Failure due to balance failure in Rx branches'

• TRX test run from the Flexi EDGE BTS Manager is failed … Ctd

'Loop test error more than specified limit'

'Failure due to invalid loop gain'

'Unable to measure power level'

'Unable to measure Rx sensitivity'



• Run the TRX test again.• If the test fails persistently, the test should be run on a

different frequency.

'Failure in BB module' • Replace the Dual TRX Module..

'RTC not in Supervisory State'

• Wait until the Remote Tune Combiner Module reached the supervisory state.

• . Run the TRX test again.

'Invalid command'

Two alternative options:• . Define RF cabling manually during commissioning or• . Connect Abis and ensure that RFCAD is run once.Note that this works only with supported configurations.

'TRX is in shutdown state'Wait until the TRX is back in the supervisory state.. Run the TRX test again.

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Troubleshooting Problem SituationsIllegal Modules

Flexi EDGE BTS modules have been incorrectly connected to the

System Module (ESMA), or System Extension Module (ESEA).

I LLEGALMODULES

The System Extension Module (ESEA) is connected to the System Module (ESMA) BUS port 1, 2, 3, 4 or 5.

• Connect the System Extension Module only to the BUS port 6 of the System Module.

The Remote Tune Combiner Module (ECxA) is connected to the System Extension Module (ESEA). Connect the Remote Tune Combiner Module only to the

BUS port 1, 2 or 3 of the System Module.The Remote Tune Combiner

Module is connected to the System Module BUS port 4, 5 or 6.

The Remote Tune Combiner Module is connected to the System Module BUS port 1, 2 or 3.

Connect a System Extension Module to BUS port 6 of the System Module.

The Dual TRX Module (EXxA) is connected to the System Module BUS port 1, 2, 3, 4 or 5.

Check if a System Extension Module is connected to the BUS port 6 of the System Module

If present:. Remove the System Extension Module, or. Reconnect the Dual TRX Module to the System Extension

Module.

The Dual TRX Module (EXxA) is connected to the System Module BUS port 1, 2, 3, 4 or 5.

Remove the unknown module.Check the Hardware – Software compatibility to confirm if

the module is supported by the active BTS software.

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Troubleshooting Problem SituationsLocal Software Download from Flexi EDGE BTS Manager

Software download fails when attempted from a locally connected Flexi

EDGE BTS Manager

LOCAL SOFTWARE DOWNLOAD FROM FLEXI EDGE BTS

The firewall of the PC running the BTS Manager prevents connection from the BTS to the BTS Manager

Check that the correct software download TCP port is open, as per the PC’s firewall (s). The software download TCP port for

local software download is 27501.

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Troubleshooting Problem Situations(E)GPRS Packet Switched Data Transfer

• Packet switched data transfer does not work

(E)GPRS Packet Switched Data Transfer

Mismatch of the EGPRS dynamic Abis pool (EDAP) size between the BSC and the BTS.

Mismatch of the EDAP location at the E1/T1.

• Check that the EDAP size is the same at the BTS and the BSC.

Check that the EDAP start and end timeslots are correct at the BSC and the BTS.

. Check that cross-connections between the BSC and the BTS are made correctly.

Mismatch of the E1/T1 interface port.

• Check that the correct transmission line is connected to the correct E1/T1 interface port at the BTS.

• .Check that the EDAP is configured to the correct exchange terminal (ET) card at the BSC; especially with large configurations where more than one ET card is used per BCF.EDGE licence does not

exist, or more licence capacity is needed at the BSC.

• Order and install new licences.

There may be BSC related configuration problems especially when the performance is degraded because of congestion, radio propagation issues or poor timing.

Refer to BSC's packet data troubleshooting instructions..

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Troubleshooting Problem SituationsQ1 Management (1/2)

• Alarms of FIFA Flexbus transmission sub-module not shown in BTS

• or BSC (Q1 polling does not work)

Q1 Management

Wrong Q1 address

Wrong Q1 baud rate

• Check the Q1 address:• Fixed Q1 addressing is used when Nokia Flexi EDGE

BTS is the Q1 bus master. The fixed Q1 address for FIFA is 4087. Nokia FlexiHub Manager fixes the address to the correct one if the BTS Polling selection is selected on the Q1 settings page. (BTS Polling)

• . If the BSC is the Q1 bus master, the user must configure a unique Q1 address for FIFA. The Q1 addresses range from 0 to 3999. Each address must be unique on the same Q1 bus, starting from the BSC. (BSC Polling)

Wrong Q1 switch settings

• Check the switch settings with FlexiHub Manager.• In BTS polling, the Q1 switch settings must be so that

at least the Processor switch is connected so that FIFA can be managed. Flexbus switches must be set if a management connection to the far end is needed through a Q1 channel in the radio overhead.

Check the baud rate. The baud rate must always match the value configured in the BSC.

Wrong Q1 master

• Check if BTS is correctly configured dependent if BTS or BSC shall have control of Q1 bus FIFA is connected to.

• Check the Q1 address of the BTS integrated transmission (TRE-1) at BSC using ZQWL command for related BCF.

• . BTS is master of Q1 Bus if TRE-1 Q1 address is equal to 4080.

• . BTS has released control of Q1 Bus if TRE-1 Q1 address is equal to 0-3999.

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Troubleshooting Problem SituationsQ1 Management (2/2)

• Alarms of FIFA Flexbus transmission sub-module not shown in BTS

• or BSC (Q1 polling does not work) …ctd

Q1

Management

CTd…

Q1 bus access conflict

Equipment (FIFA) not added to BCF

Check your Q1 bus setup. Only one Q1 master is allowed to be connected to a Q1 bus. If two or more Q1 master accessing the same Q1 bus, then replan Q1 bus setup of the BSS network and ensuring that only 1 Q1 bus master connects to a Q1 bus.

Equipment (FIFA) not added to service channel

Check that the service channel is created (BSC command ZQWI;)

. Check that the service channel is activated (the state must be AL)

. Check that FIFA is added to the service channel (ZQWI:<channel number>: ALL;).

• If BTS shall be master of Q1 BUs FIFA is connected to, check if FIFA is part of BCF transmission equipment list using ZQWL command. Displayed ID of FIFA is "2GBTSFIU".

• . If FIFA is not present at list, add FIFA to list at BSC using ZQWA command.

Faulty FIFA • Replace FIFA.

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Troubleshooting Problem SituationsPseudoWire Operation

• Pseudo Wire is not operating correctly.

PseudoWire Operation

Ethernet Link is down.

PseudoWire is down.

• Ensure that the Ethernet cable is connected to EIF1 only. EIF2 is not supported.

• For Optical interface (EIF3), the correct optical cable is used MultiMode or Single mode according to the SFP module.

Commissioning with PWE mode fails after about 13 minutes when PW is selected as priority 1 synchronization source.

• Try to ping from the BTS Manager (Refresh button in the PW tunnel settings).

• .Verify that the correct ARP entry is created.• There is no IP conflict.• Verify that the channel group contains the same

number of time slots on both sides, the BTS and the Far-end PW device.

• Configure the same number of frames per packet.• Jitter buffer needs to be increased.• Check the packet loss counters from the Performance

monitoring.

• Check the clock recovery state of the PW used as a Synchronization Source in the Transmission Manager. If the clock recovery state has reached Acquiring state, it may reach Tracking state even after the commissioning has failed. Once the Tracking state is reached, the BTS should be fully operational.

• . If you have configured more than one PW in use, check the clock recovery states of these PWs. If any of the PWs has reached Tracking state, select this PW as a synchronization source. . Check the Performance counters for early and late packets. If they occur, increasing the jitter buffer size may help.

Synch Recovery failed, that is, no PW reaches tracking state.

• Increase jitter buffer.• External synchronisation might be

needed.• In case of synch IN on E1/T1 interface,

connect the cable to the correct interface as selected in the BTS Manager.

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How to find the reference of Flexi EDGE BTS in NOLS

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How to find the reference of Flexi EDGE BTS in NOLS

• Open the site:

www.online.nokia.com

• Type Username & Password

• Click Documentation tab

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How to find the reference of Flexi EDGE BTS in NOLS – Generic Failure Report

• In Documentation Center, we can search the document for specific network element

• Choose the Flexi EDGE BTS on Product tab, and also choose which Document Type. Here, we choose Generic Failure Report

• For information, Document Type can be divided into:

• Customer Documentation

• Maintenance Documentation

• After filling the filter search, click GO button

• Release Documentation

• Product Documentation

• Generic Failure Report

• Technical Notes

• Material Declaration

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How to find the reference of Flexi EDGE BTS in NOLS - Generic Failure Report

• Click on the document on the list of search result.

• Download the document by right click on the list of title document.

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How to find the reference of Flexi EDGE BTS in NOLS – Technical Notes

• Choose Technical Notes in Documentation type

• Click on the document on the list of search result.

• Download the document by right click on the list of title document.

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How to find the Software of Flexi EDGE BTS in NOLS

• Click Care tab

• In Care menu, choose Software Delivery tab

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How to find the Software of Flexi EDGE BTS in NOLS – SW Package & Documentation

• In Software Delivery menu, there will be list of SW can be downloaded categorized by type of Network Element

• Under Software Catalogue Radio Network, Choose Flexi EDGE BTS

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How to find the Software of Flexi EDGE BTS in NOLS - SW Package & Documentation

• In Software List Radio Network, we can choose based on Release and Package Type

• Click GO• Choose which SW Package will be downloaded

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• In Software Detail, usually the content will be:

• BTS SW and

• Package Documentation• Thick on each SW and/or Document want to be downloaded

• Click the download button

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• After downloaded, each zip file can be extracted into the same folder

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How to find Flexi EDGE BTS Manager in NOLS

• SW Package documentation zip file, consist of several documents.

• To browse of the document easily, cdcons.html can be used.

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• Each Flexi EDGE BTS SW has its own compatibility to particular Flexi EDGE BTS, which explained in Release Notedocument along with the SW Package.

• Detail table of compatibility both SW and HW can be found in Software Compatibility document.

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• In Care Software Delivery Software Catalogue in NOLS, select SiteWizard under Element Management Product • In Software List

Radio Network, search based on Release and Package Type

• Click GO• Choose which SW Package will be downloaded

• Do the same procedure as downloading the SW Package

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Flexi Bts Troubleshooting

Documents

Transcript of Flexi Bts Troubleshooting