Overview of AXE-10

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Overview of AXE-10 System

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INTRODUCTIONE-10-B gave tremendous boost to telecom N/w .E-10-b have excellent grade of service Yet it is failed in a no. of occasions in metro cities created a no. of problem. The main reasons are 1. Lower BHCA--1,90,000 2.No support of ISDN & CCS#7 Max capacity of a TAX< 10K.2

SALIENT DESIGN FEATURES OF AXE-10-SPC -PCM-TIME DIVISION SWITCHING(DIGITAL SWITCHING)-DUPLICATED CENTRAL PROCESSOR (CPs) HOT S/B MODE -REGIONAL PROCESSORS(RPs)OFF LOADS THE CP BY PERFORMING TASKS OF SIMPLE REPETITIVE NATURE. -FUNCTIONAL MODULARITY--ADVANTAGES - SMOOTHER, QUICKER HARDWARE EXTENTION -SYSTEM UPGRADATION IS EASIER. -NEW FUNCTIONS EASILY INCORPORATED

-ONE SYSTEM FOR ALL APPLICATIONS

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FUNCTIONAL HIERARCHYAXE-10 CONSIST OF 2 MAIN PARTS: 1. 2. APT : TELEPHONY PART , FOR SWITCHING CALLS APZ : CONTROL PART ,FOR CONTROL & PROCESSING OF DATA. BOTH APT & APZ USE HARDWARE AND SOFTWARE. APT IS DEVIDED INTO SUBSYSTEMS NAMELY SSS, TSS, GSS,OMS, CCS,TCS, SUS etc. EACH SUBSYSTEM PERFORM WELL DEFINED FUNCTION AND HAS No.OF FUNCTION BLOCKS. EACH FUNCTION BLOCK HAVE FUNCTIONAL UNITS. SOME OF THE SUBSYSTEMS ARE REALISED IN S/W AND OTHERS IN H/W & IN S/W. APZ IMPLEMENTED IN HARDWARE AND SOFTWARE AND DEVIDED INTO SUBSYSTEMS NAMELY CPS, MAS( MAINTENANCE SUBSYSTEM) FMS, SPS, DCS, etc. S/W (PROGRAMS & DATA) OF APT IS STORED IN APZ HARDWARE ( PROGRAME STORE AND DATA STORE)

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FUNCTIONAL HIERARCHY OF AXE-10 APT SUBS SWITCHING EQUIPMENTAPT-TELEPHONY PART OF AXE(PCB) APZ-CONTROL PART OF AXE (S/W) BHCA VALUES OF 4 APZ AREAPZ210144,000 BHCA APZ211--150,000 BHCA APZ212800,000 BHCA APZ21311,000 BHCA

TRUNKS

COMPUTER

APT APZSTORE CONTENT5

APZ

APT SUBSYSTEMS:SUBSYSTEMS REALISED IN BOTH H/W AND S/W 1.SSS:HANDLES TRAFFIC TO AND FROM SUBS. CONNECTED TO THE EXCH. 2.TSS: HANDLES SIG. & SUPERVISION OVER JUNCTIONS TO THEIR EXCH. 3. GSS: SET UP ,SUPERVISES,CLEARS CONNECTIONS THROUGH GS. SELECTION OF A PATH TAKE PLACE IN THE S/W. 4. OMS: FUNCTIONS RELATING TO STATISTICS AND SUPERVISION. 5. CCS:FUNCTIONS FOR SIG. ROUTING SUPERVISION AND CORRECTION OF MESSAGES SENT IN ACCORDANCE WITH CCITT No.6 & 7.

SUBSYSTEMS CONTAINING S/W ONLY1.TCS(TRAFFIC CONTROL SUBSYSTEM) : CENTRAL PART OF APT AND DOES ALL THE FUNCTIONS PERFORMED BY AN OPERATOR IN A MANUAL EXCH. FOR SETTING UP , SUPERVISION, CLEARING OF CALLS, SELECTION OF O/G ROUTES, ANALYSIS OF I/C DIGITS, STORAGE OF SUBS CATEGORIES etc. 2.CHS: CHARGING SUBSYSTEM HANDLES CALL CHARGING . 3. SUS:SUBS SERVICES SUBSYSTEMSUBS FACILITIES LIKE ABBREVATED DIALLING, CALL TRANSFER, WAKE-UP SERVICES etc.

TWO TYPES OF PROCESSORS SUBS SWITCHING EQUIPMENTS

1.REGIONAL PROCESSOR ROUTINE SCANNING OF EQUIPMENTS e.g. LIFTING OF HANDSET BY SUBS.THIS IS DONE SEVERAL TIMES/SEC

RPs

2.CENTRAL PROCESSOR COMPLEX ANALYSIS AND DIAGOSTICS REQUIRING HIGH COMPUTING CAPACITY AND LARGE VOLUME OF DATA,e.g.SELECTION OF O/G ROUTES OR TRAFFIC MEASUREMENTS.

CP

STORE CONTENT7

RPs ASSISTS CENTRAL PROCESSOR IN PERFORMING ROUTINE TASKS AND REPORTS IMPORTANT EVENTS OCCURING IN THE EXCH. TO THE CP ALL DECISION ARE MADE BY CP.

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STRUCTURE OF THE AXEAXE SYSTEM LEVEL 1 APZ APT SYSTEM LEVEL 2

TSS SUS FMS MCS CPS BT OT

OMS

SUB SYSTEM

APT--TELEPHONY PART OF AXE APZ--CONTROL PART OF AXE BT--BOTHWAY TRUNK BTR--REGIONAL SOFTWARE OF BLOCK BT BTU--CENTRAL SOFTWARE OF BLOCK BT

CSR FUNCTION BLOCK FUNCT ION UNITS9

BTU

BTR

HW

AXE SYSTEM LEVEL 1 APZ APT SYSTEM LEVEL 2

TSS SUS FMS MCS CPS BT OT

OMS

SUB SYSTEM

CPS--CENTRAL PROCESSOR SUB SYSTEM CSRCODE SENDER/RECEIVER

CSRFUNCTION BLOCK

FMS--FILE MANAGEMENT SUBSYSTEM HW--HARDWARE BTU MCS--MAN MACHINE COMMUNICATION SUB SYSTEM/ OMSOPERATION AND MAINTENANCE SUBSYSTEM BTR HW

FUNCTION UNITS

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AXE SYSTEM LEVEL 1 APZ APT SYSTEM LEVEL 2

TSS SUS FMS MCS CPS BT OT

OMS

SUB SYSTEM

OMS--OPERATION AND MAINTENANCE SUB SYSTEM OT--OUTGOING TRUNK SUS-- SUBSCRIBER SERVICES SUBSYSTEM TSS--TRUNK AND SIGNALLING SUBSYSTEM

CSRFUNCTION BLOCK FUNCTION UNITS

BTU

BTR

HW11

HARDWARE

BTR

PROGRAM DATA

REGIONAL SOFRWARE

CENTRAL SOFTWAREPROGRAM

BTUDATA

INTERWORKING

FUNCTION BLOCK BT INTERWORKING OF FUNCTION BLOCK

FUNCTION BLOCK X

FUNCTION BLOCK Y (ONLY S/W BLOCK)

INTERWORKING BETWEEN FUNCTION BLOCKS IS ONLY AT CENTRAL LEVEL12 DATA OF A FUNCTION BLOCK IS ACCESSED BY ITS OWN PROGRAM ONLY

AXE SUB SYSTEM SWITCHING SUB SYSYEMS(APT) GSS TSSSYSTEM CORE

TCS

OMS

SSS MTS

CCS OPS

SUS BGS

CHS NMS

OPTIONAL SUBSYSTEM DATA PROCESSING SUB SYSTEM(APZ) CPS RPS MAS IOS

SPS

FMS

MCS

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DCS

AXE SUB SYSTEM SWITCHING SUB SYSYEMS(APT) GSS TSSSYSTEM CORE

TCS

OMS

SSS MTS

CCS OPS

SUS BGS

CHS NMS

OPTIONAL SUBSYSTEM DATA PROCESSING SUB SYSTEM(APZ) CPS RPS MAS IOS14

SPS

FMS

MCS

DCS

APT SUBSYSTEM HARDWARE(PCBS)

GSS

TSS

OMS

SSS

CCS

MTS

SOFTWARE (PROGRAMS + DATA )

NMS BGS

GSS TSS

OMS SSS CCS

MTS OPS

TCS

CHS SUS

BGS BUSINESS GROUP SUBSYSTEM CHS COMMON CHANNEL SIGNALLING SUBSYSTEM CHS CHARGING SUBSYSTEM GSS GROUPS SWITCHING SUB SYSTEM MTS MOBILE TELEPHONY SUBSYSTEM15

APT SUBSYSTEM HARDWARE(PCBS)

GSS

TSS

OMS

SSS

CCS

MTS

SOFTWARE (PROGRAMS + DATA )

NMS BGS GSS TSS OMS SSS CCS MTS OPS NMS NETWORK MANAGEMENT SUBSYSTEM OMS OPERATION AND MAINTENANCE SUBSYSTEM OPS

TCS

CHS SUS

OPERATOR SUB SYSTEM / TCS -TRAFFIC CONTROL SUBSYSTEM

SUS SUS SUBSCRIBER SERVICES SUBSYSTEM / TSS- TRUNK AND SIG. SUBSYSTEM SSS SUBSCRIBER SWITCHING SUBSYSTEM

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APT SUBSYSTEMHARDWARE

GSS TSS OMS SSS CCS MTS REGIONAL SOFRWARE (PROGRAMS + DATA)

GSS TSS OMS SSS CCS

MTS

CENTRAL SOFTWARE (PROGRAMME +DATA)

GSS TSS OMS SSS CCS MTS OPS TCS CHS SUS17

HARDWARESUBS

SUBSYSTEM IN A LOCAL ESCHANGERSS GSS SSS CCS SSS TSS TRUNKS

CENTRAL SOFTWARE SSS SUS SYSTEM CORE (GSS, OMS,TCS, TSS) CHS CCS

CCSCOMMON CHANNEL SIGNALLING SUBSYSTEM CHSCHARGING SUBSYSTEM/TSSTRUNK AND SIGNALLING SUBSYSTEM GSS--GROUP SWITCHING SUB SYSTEM / TCSTRAFFIC CONTROL SUBSYSTEM OMSOPERATION AND MAINTENANCE SUBSYSTEM18

SSSSUBS, SW. SUBSYSTEM/SUSSUBS SERVICES SUBSYSTEM

SUBSYSTEM REALISED IN HARDWARE AND SOFTWARE(APT SUBSYSTEM FUNCTIONS.)SSSSUBSCRIBER SWITCHING SUBSYSTEM --HANDELS TRAFFIC FROM AND TO SUBSCRIBERS (ANALOG AND DIGITAL) TSS TRUNK AND SIGNALLING SUBSYSTEM --HANDLES SIGNALLING ON TRUNKS. --SUPERVISES CONNECTIONS OVER TRUNKS. GSSGROUP SWITCHING SUBSYSTEM --SETS UP , SUPERVISES AND CLEARS CONNECTIONS IN DIGITAL GROUP SWITCH. CCSCOMMON CHANNEL SIGNALLING SUBSYSTEM --HANDELS CCS#7 FUNCTIONS. OMSOPERATION AND MAINTENANCE SUBSYSTEM. --PERFORMS SUPERVISION FUNCTIONS ON HARDWARE --TRAFFIC AND SERVICE MEASUREMENTS.19

SUBSYSTEM REALISED IN SOFTWARE ONLY TCSTRAFFIC CONTROL SUBSYSTEM --CONTROLS CALL SET UP, SUPERVISION AND RELEASE. --STORES SUBSCRIBER DATA, CIRCUIT DATA AND OTHER OFFICE DATA. CHS CHARGING SUB SYSTEM --CALL CHARGING FUNCTIONS. SUSSUBSCRIBER SERVICES SUBSYSTEM -- PROVIDES SUBSCRIBER SERVICES LIKE CALL TRANSFER, CALL WAITING, DYNAMIC STD BARRING etc. (OTHER THAN BASIC FACILITIES LIKE PUSH BUTTON DIALLING, DETAILED BILLING etc.)

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APZ SUBSYSTEM FUNCTIONSCPSCENTRAL PROCESSOR SUBSYSTEM --PROGRAM ADMINISTRATION --DATA STORAGE AND HANDLING --CHANGING OF PROGRAMS RPSREGIONAL PROCESSOR SUBSYSTEM -- OFFLOADS CENTRAL PROCESSOR MASMAINTENANCE SUBSYSTEM --LOCATES HARDWARE AND SOFTWARE FAULTS IN CENTRAL PROCESSOR . IT IS RESPONSIBLE FOR MAINTENANCE OF PROCESSOR AND WORK IN CLOSE RELATIONSHIP WITH CPS. IOSINPUT / OUTPUT SYSTEM CONSIST OF THE FOLLOWING SUBSYSTEMS SPSSUPPORT PROCESSOR SUBSYSTEM FMSFILE MANAGEMENT SUBSYSTEMMCSMAN-MACHINE COMMUNICATION SUBSYSTEM DCSDATA COMMUNICATION SUBSYSTEM 21

SUPORT PROCESSOR SUBSYSTEM Hardware is duplicated in the form of two cabinets, Node- a and node b It communicates with all I / o devices and cp for man machine communication, file management ETC.

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ORGANISATION OF APT SUBSYSTEM (SSS, GSS, TSS, CCS ) SUBSYSTEM (HARDWARE)EXTENSION MODULES (EMS) EQUIPMENTS LOCATION CABINETS SHELVES (6 PER CABINET EXCEPT CP CABINETS)

MAGAZINES (ASSEMBLIES OS PCBs,1 TO 4 MAGAZINES PER SHELF )

PCBs

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SUBSCRIBER SWITCHING SUBSYSTEM ( SSS )SSS CONSISTS OF TWO TYPES OF SWITCHES :

SSS

1.

LOCAL SUBSCRIBER SWITCHES () ALSO COMMONLY KNOWN AS LOCAL EMG; EXTENTION MODULE GROUP ):LSS

2.REMOTE SUBSCRIBER SWITCH (REMOTE EMG ):RSS ALL THE REMOTE SUBSCRIBER SWITCHWS AT A LOCATION ARE TOGETHER CALLED RSU, REMOTE SWITCHING UNIT. AN LSS OR AN RSS MAY CONSIST OF THE FOLLOWING MAGAZINES: LSM A LSM BA LSM PRA SEPRM : : : : LSM, ANALOG LSM ISDN, BASIC ACCESS (2B + D ) LSM ISDN , PRIMARY RATE ( 30B + D ) SEPCIAL EQUIPMENTS FOR PRIVATE METERS ( OPTIONAL ) = 8 PRIVATE METERS CARD, ONE CARD =8 METERS. A SULTAACCS MAG. = FOR 4 LSSs . FOR SUBS.LINE TESTING AND FEEDING HOWLER TONE. A PAIR OF RPBC MAG. EVERY LSS INTERFACE IN LSS & CP. IOSULTIN RSS -FOR TESTING OF SUBS. LINE, GENERATION OF HOWLER TONE,24 FOR CONNECTION OF AN ALPFANUMERIC TML. FOR USE AT RSS;FOR MAN-M/ C COMMUNICATION.

LSM A

128 ANALOG SUBS. ( 32 LI PCBs x 4 SUBS/ PER LI )

LSM BA

64 x (2B + D ) SUBS. (8 LIBA PCBs x 8 (2B +D ) SUBS.PER