GENERAL ARCHITECTURE OF OCB-283

GENERAL ARCHITECTURE OF OCB-283
SUBSYSTEMS & FUNCTIONS OF OCB-283

GENERAL FUNCTIONAL BREAKDOWN OF ALCATEL 1000 E-10 (OCB-283)
CCITT #7 SIGNALING NETWORK TELEPHONE NETWORK SUBSCRIBER ACCESS SYSTEM CONNECTION AND CONTROL DATA NETWORK VALUE ADDED NETWORK DISK OPERATION AND MAINTENANCE O&M NETWORK PABX MAGTAPE

OCB-283 ARCHITECTURE OCB-283 COMPRISES OF FOLLOWING 3 SUBSYSTEMS
CCITT #7 SIGNALING NETWORK SUBSCRIBER ACCESS SUBSYSTEM CONTROL & CONNECTION SUBSYTEM OPERATION & MAINTENANCE SUBSYTEM TELEPHONE NETWORK SUBSCRIBER ACCESS SYSTEM CONNECTION AND CONTROL DATA NETWORK VALUE ADDED NETWORK DISK OPERATION AND MAINTENANCE O&M NETWORK PABX MAGTAPE

THIS IS MANUFACTURED BY M/S ALCATEL OF FRANCE
INTRODUCTION OF OCB-283 OCB-283 is the latest Electronics Digital ISDN type Switching technology being imported in INDIA THIS IS MANUFACTURED BY M/S ALCATEL OF FRANCE This Exchanage works on Stored Programme Control Principle. Exchange can work with all types of Circuit & Subscriber Signallings & also provides for lot of novel facilities to the subscribers. This exchange can work on Common Channel Signalling principle using the CCITT#7 reccommendations .

INTRODUCTION OF OCB-283 Exchange has got 3 basic subsystems :-
1 SUBSCRIBER ACCESS SUBSYSTEM 2 CONNECTION & CONTROL SUBSYSTEM 3. OPERATION & MAINTENANCE SUBSYSTEM

INTRODUCTION OF OCB-283 1. Subscriber Access Subsystem:- This is treated as an independent entity Every Subscriber Connecting Equipment Rack has got its Signalling Point Number to operate in Common Channel Signalling mode with rest of the exchange Subsystems.

INTRODUCTION OF OCB-283 2. Control & Connection Subsystem is the block consisting of A-CONTROL FUNCTIONS B-CONNECTION & SWITCHING EQUIPMENTS

INTRODUCTION OF OCB-283 A-CONTROL FUNCTIONS
COMPRISE OF COMMON CONTROL equipments which; process monitor & control the call setup & release

INTRODUCTION OF OCB-283 CONNECTION &SWITCHING BLOCK COMPRISES OF
Switching matrix equipment for performing digital time switcihing of speech path Connection equipments for connecting PCM (digital) Junctions from; other exchanges & RSU’s Auxiliary Equipments for Tones ,Frequencies & other auxillaries for signalling protocol handling .

INTRODUCTION OF OCB-283 3. OPERATION & MAINTENANACE SUBSYTEM :-
FOR O&M OF EXCHANGE BY OPERATORS

INTER NETWORKING WITH OTHER SYSTEMS
THE OCB-283 CAN BE CONNECTED TO ANY TECHNOLOGY SWITCHES PROVIDED -THEY CATER TO STANDARD SIGNALLINGS

STANDARD SIGNALLINGS CHANNEL ASSOCIATED STEP BY STEP R2 MF
COMMON CHANNEL SIGNALLING

LET US NOW UNDERSATAND COMMON CHANNEL SIGNALING BEFORE GOING FURTHER

OCB-283 FOLLOWS CCITT-NO 7 SIG.PROTOCOL FOR COMMON CHANNEL SIGNALING
COMMON SIGNALING CHANNEL EXCHANGE B EXCHANGE A VOICE CHANNELS EXCHANGE C SIGNALING TIME SLOT LINK CARRIES ALL THE SIGNALING FOR ALL THE VOICE CHANNELS BETWEEN TWO EXCHANGES

OCB-283 USES COMMON CHANNEL SIGNALING BETWEEN ITS SUBSCRTIBER ACCESS SUBSYSTEM & REST OF THE EXCHANGE EQUIPMENTS LET US SEE HOW SUBS ACCESS UNITS - CSN’S USE COMMON CHANNEL SIGNALING CCS#7

OCB-283 RSU CCS SIGNALING POINTS IN REFERENCE TO
CSN 1 CSN 2 PS 1 CSN 3 PS 2 COC PS 3 RSU EXCH. COMMON PS=255 (LOCAL) PS 4 CSN 4 CSN 5 PS 5 PS 63 CSN 63 COC:- COMMON SIGNALING CHANNEL OCB-283 CCS SIGNALING POINTS IN REFERENCE TO OCB-283’s SUBSCRIBER ACCESS UNITS: CSNS

CCS SIGNALING POINTS FOR OCB-283 IN NATIONAL NETWORK
COC:- COMMON SIGNALING CHANNEL LOCAL CSN 2 CSN 1 PS 1 CSN 3 PS 2 PS 3 CIC:- VOICE CHANNELS RSU EXCH 2 PS=3000 SP2 PS 4 EXCH 1 PS=2000 SP1 COC0 CSN 4 CSN 5 COC1 PS 5 COC:- COMMON SIGNALING CHANNEL PS 63 CSN 63 NATIONAL OCB-283 STP PS-2033 PS= SIGNALING POINT NO STP=SIGNAL TRANSFER POINT CSNs ARE GIVEN LOCAL VERSION OF PS No. EXCHANGES & STP GET NATIONAL PSNo. CCS SIGNALING POINTS FOR OCB-283 IN NATIONAL NETWORK

functional architecture of OCB-283

OCB-283 FUNCTIONAL DIAGRAM OM MQ GX MR TX TR PC SMX MCX SMT COM SMA
CSNL SMX LR (4MB / S) CSND DT BT 2 MB/S PCM MCX LR SMT URM LR COM ETA PU PE CKTS SMA COMMUNICATION MULTIPLEX TMN OM MQ GX MR TX TR PC

OCB-283 SWITCHING SYSTEM Any Automatic Switching System comprises in general of following distinct Subsystems :------ Subscriber Access Subsystem Connection & Control Subsystem which comprises of (a) Switching Network Units (b) Circuit Connection Units (c) Common Control function units Operation & Maintenance Subsystem In OCB-283 we can classify various units into following types according to the nature of their functions :- Connection Units -These provide facility to connect a Speech path from a subscribers loop or circuits from an external PCM and transfers these Speech samples on to selected Time Slots called voice channels on a LR link (internal PCM) - These units are NAME FUNCTIONAL NAME (a) Subscriber Connection units CSNL, CSND, CSED (b) Circuit Connection Units SMT (URM ) (c) Tones & Frequency Receiver/ SMA ( ETA ) Sender & Common Channel Signaling SMA ( PUPE ) Protocol Handler Switching Network - These provides facility for CONNECTING the LRs (internal PCM’s) coming from connection units and performs Switching Operation for Calling Subs TS onto Called Subscriber TS & vice versa for a two way connection per call of telephony.

Control Units - These units provide control of calls on the basis of Stored programs & they process the calls on reception of dialed digits from calling subscriber/ circuit & take part in handling of call setup & release by processing .monitoring, measuring charging of call & all other common control function s needed for working of an Automatic Common Control Exchange. - These Control units can comprise of following Functions FUNCTION NAME OF UNIT NATURE OF JOB MR : Multiregister Call-handler SET UP & RELEASE OF CALL TR : Translator Translation of digit ,Data-bank of subs & ckts in files MQ : Marker Message distribution between Common Control & Connection units TX : Charger Computing the charge of a call, keeping meters GX : Matrix System Handler Processes & makes connections in Switching matrix on the orders of MR or MQ PC : Common Channel Signaling Manages the CCS#7 network for signaling Network Controller O& M Units & Maintenance Peripherals :- - In an Electronic Stored Programme Control Digital Exchange like OCB-283, all operation & maintenance activities are performed by a unit called O & M unit or OMC (Operation & Maintenance Center) - This provides access for Man Machine dialogues for the human operators to interact and command the working of Exchange Equipments.

SUBSCRIBER ACCESS SUBSYSTEM

SUBSCRIBER ACCESS SUBSYSTEM
OCB-283 SUBSCRIBER ACCESS SUBSYSTEM SUBSCRIBERS IN OCB-283 ARE CONNECTED ON “ DIGITAL SUBSCRIBER CENTER” CSN CSN CAN BE LOCAL OR DISTANT LOCAL CSN IS CALLED CSNL DISTANT CSN IS CALLED CSND SUBSCRIBERS CAN ALSO BE CONNECTED VIA A CSED PABX OR CENTREX SUBSCRIBER CAN ALSO ACCESS TO OCB-283

CONNECTION SUBSYSTEM OM MQ GX MR TX TR PC SMX MCX SMT COM SMA CSNL
LR (4MB / S) CSND DT BT 2 MB/S PCM MCX LR SMT URM LR COM ETA PU PE CKTS SMA COMMUNICATION MULTIPLEX TMN OM MQ GX MR TX TR PC

CONNECTION SUBSYSTEM COMPRISES OF
SWITCHING MATRIX STATION SMX TRUNK MULTIPLEX STATION SMT AUXILIARY EQUIPT. STATION SMA & ALL ASSOCIATED LR LINKS

SWITCHING MATRIX STATION SMX
SMX IS THE STATION WHERE TWO WAY TS SWITCHING IS DONE SMX HOLDS A SOFTWARE LOGICAL MACHINE MLCOM SMX ARE PROVIDED IN DUPLICATE FOR THE DUPLICATED SPEECH PATH AS SWITCHING IS FULLY DUPLICATED IN OCB-283

TRUNK MULTIPLEX CONTROL STATION : SMT
SMT IS THE HARDWARE STATION WHERE THE EXTERNAL PCMS ARE TERMINATED LOGICAL FUNCTION OF SMT IS URM SMT CONVERTS EXTERNAL PCM’s (HDB3) TO BINARY & VICEAVERSA & MAKES LR LINKS TOWARDS SMX FOR SWITCHING SMT CAN CONNECT PCM’s FROM (a) CSND (RSU’S) OR (b)CSED (RLU’s) OR (c) PCM’s FROM A DISTANT EXCHNAGE

AUXILIARY EQUIPMENT UNITS: SMA
SMA IS THE HARDWARE STATION WHICH SUPPORTS FOLLOWING AUXILIARY EQUIPMENT FUNCTIONS :- 1. ETA : PROVIDES TONES : FREQUENCY SENDER & RECEIEVER : CONFERENCE CIRCUITS : EXCHANGE CLOCK IN FIRST TWO SMA 2. PUPE :HANDLES COMMON CHANNEL SIGNALING LINKS CARRYING CCS7 PROTOCOL ABOVE FUNCTIONS ARE CONNECTED TO SMX BY LR LINKS FOR SWITCHING

CONTROL SUBSYSTEM OCB-283 FUNCTIONAL DIAGRAM OM MQ GX MR TX TR PC SMX
CSNL SMX LR (4MB / S) CSND DT BT 2 MB/S PCM MCX CONTROL SUBSYSTEM LR SMT URM LR COM ETA PU PE CKTS SMA COMMUNICATION MULTIPLEX TMN OM MQ GX MR TX TR PC

CONTROL SUBSYSTEM CONTROL SUBSYSTEM SUPPORTS ALL THE COMOMN CONTROL FUNCTIONS OF EXCHANGE WHICH SETUP & RELEASE A CALL COMMON CONTROL FUNCTIONS ARE :- MR,TR,TX,MQ,GX & PC IN SOFTWARE FORM THEY ARE CALLED LOGICAL MACHINES HARDWARE COMPONENT IS CALLED MAIN CONTROL STATION SMC ANY ONE OR MANY CONTROL FUNTIONS CAN BE LOADED IN A HARDWARE STATION.

ROLE OF COMMON CONTROL FUNCTIONS
THE MAIN CONTROL STATION SMC SUPPORTS THE FOLLOWING COMMOMN CONTROL FUNCTIONS FOR DOING THE DEFINED JOBS - MR CALL HANDLER(OVERALL CONTROLLER OF CALLSETUP & RELASE) - TR TRANSLATOR (DIGIT ANALYSIS & DATA ) - TX CHARGING DEVICE ( TAXING & METERS) - MQ MESSAGE DISTRIBUTOR (MARKING) - GX MATRIX SYSTEM HANDLER (SWITCHING) - PC CCS 7 SIGNALING LINKS NETWORK CONTROLLER (MONITORING OF PUPE)

O & M SUBSYSTEM OCB-283 FUNCTIONAL DIAGRAM OM MQ GX MR TX TR PC SMX
CSNL SMX LR (4MB / S) CSND DT BT 2 MB/S PCM MCX O & M SUBSYSTEM LR SMT URM LR COM ETA PU PE CKTS SMA COMMUNICATION MULTIPLEX TMN OM MQ GX MR TX TR PC

OPERATION & MAINTENANCE SUBSYSTEM
O& M COMPRISES OF DUPLICATED HARDWARE STATION SMM & SOFTWARE MACHINE OM IT IS THE PROCESSOR FOR OPERATION & MAINTENANCE OF EXCHANGE BY MAN MACHINE COMMANDS SMM PROVIDES ACCESS TO OPERATOR THROUGH PERIPHERALS LIKE TTY,VDU SMM ALSO HAS MAGTAPE & DISKS FOR STORAGE THIS SUBSYSTEM CAN BE ACCESSED FROM REMOTE NETWORK MANAGEMENT CENTRE NMC OR TELECOM MANAGEMENT NETWORK TMN

COMMUNICATION MULTIPLEX
OCB-283 FUNCTIONAL DIAGRAM CSNL SMX LR (4MB / S) CSND DT COMMUNICATION MULTIPLEX BT 2 MB/S PCM MCX LR SMT URM LR COM ETA PU PE CKTS SMA COMMUNICATION MULTIPLEX TMN OM MQ GX MR TX TR PC

COMMUNICATION MULTIPLEX
COMMUNICATION MULTIPLEX IS THE HIGHWAY OF COMMUNICATION BETWEEN VARIOUS HARDWARE STATIONS OF OCB-283 IT WORKS ON THE PRINCIPLE OF TOKEN RING THERE ARE TWO TYPE OF COMM. MULTIPLEXES MIS MAS

TIME BASE OCB-283 FUNCTIONAL DIAGRAM OM MQ GX MR TX TR PC SMX MCX SMT

SYNCHRONISATION & TIME BASE
TIME BASE IS USED TO SYNCHRONISE THE LR LINKS TIMEBASE IS GENERATED IN OCB BY STS EQUIPMENT STS COMPRISE OF THREE OSCILLATOR CARDS PROVIDING TRIPLICATE TIME BASE STS EQUIPMENT IS MOUNTED IN SMM RACK

LR LINKS OCB-283 FUNCTIONAL DIAGRAM OM MQ GX MR TX TR PC SMX MCX SMT

LR LINKS CONNECTION UNITS ARE LRE -> ENTERING SMX
LR LINKS ARE SPEECH CARRYING PCM LINKS WORKING INTERNALLY IN THE EXCHANGE BETWEEN CONNECTION UNITS & SWITCHING MATRIX SMX CONNECTION UNITS ARE CSNL SMT SMA LR’s ARE PAIR OF UNIDIRECTIONAL DIGITAL TIME DIVISION MULTIPLEXED PATHS : LRE -> ENTERING SMX LRS -> LEAVING SMX THESE CARRY 32 TIME SLOTS IN A TIME FRAME OF 125 MICROSECOND WITH 16 BITS PER TIME SLOT LR’s WORK ON Mega Bits Per Second RATE LR’s ARE ALSO CALLED MATRIX LINKS

IN OCB-283

FUNCTIONAL EQUIPMENTS INVOLVED IN CALL HANDLING
CALL PROCESSING FUNCTIONAL EQUIPMENTS INVOLVED IN CALL HANDLING MCX CSNL CSNL SC SC VC VC CSND URM ETA SC COM PU/PE CKTS SC MAS TX TR MR MQ GX PC MIS SC: Signalling channel VC: Voice channel OM

CALL PROCESSING NEW CALL ORIGINATION
TS-16 OF LR 0 &LR 1 OF CSN ARE SIGNALING CHANNELS SC BETN. CSN & THE EXCHANGE EQUIPMENT (PU/PE) CKTS OM TR MR MQ GX PC TX MAS MIS SC MCX COM CSNL CSND VC URM ETA SC: Signalling channel VC: Voice channel ‘A’ ‘B’ PU/PE

CALL PROCESSING NEW CALL ORIGINATION
TS-16 OF LR 0 &LR 1 OF CSN ARE SIGNALING CHANNELS SC BETN. CSN & THE EXCHANGE EQUIPMENT (PU/PE) NEW CALL MESSAGE COMES ON SIG.CHANNEL SC CKTS OM TR MR MQ GX PC TX MAS MIS SC MCX COM CSNL CSND VC URM ETA SC: Signalling channel VC: Voice channel ‘A’ ‘B’ PU/PE

CALL PROCESSING CALLING SUBS. COS IDENTIFICATION
NEW CALL MESSAGE IS SENT TO MR BY PUPE. CKTS OM TR MR MQ GX PC TX MAS MIS SC MCX COM CSNL CSND VC URM ETA SC: Signalling channel VC: Voice channel ‘A’ ‘B’ PU/PE

CALL PROCESSING CALLING SUBS. COS IDENTIFICATION
NEW CALL MESSAGE IS SENT TO MR BY PUPE. MR REQUESTS CALLING SUBSCRIBER DATA FROM TR OVER MIS TR PROVIDES CALLING SUB’S COS DATA TO MR CKTS OM TR MR MQ GX PC TX MAS MIS SC MCX COM CSNL CSND VC URM ETA SC: Signalling channel VC: Voice channel ‘A’ ‘B’ PU/PE

CALL PROCESSING MCX SIDE ADDRESS OF VC
MR REQUESTS MQ TO PROVIDE ADDRESS OF VC ON MCX (LR-LRX CORRESPONDENCE) MQ PROVIDES MCX SIDE ADDRESS TO MR CKTS OM TR MR MQ GX PC TX MAS MIS SC MCX COM CSNL CSND VC URM ETA SC: Signalling channel VC: Voice channel ‘A’ ‘B’ PU/PE

CALL PROCESSING DIAL TONE PROVISION TO CALLING SUBS.
MR ORDERS MCX FOR CONNECTING DIAL TONE TO CALLING SUBS. ON LRS-TS VC DIAL TONE IS PROVIDED FROM MCX (DIALTONE GIVEN BY ETA’s TS-LRE TO MCX) ‘A’ ‘B’ MCX CSNL SC SC CSNL VC DT CSND URM ETA SC COM PU/PE CKTS SC MAS TX TR MR MQ GX PC MIS OM SC: Signalling channel VC: Voice channel

CALL PROCESSING RECEPTION OF FIRST DIGIT
FIRST DIGIT IS RECEIVED VIA VOICE CHANNEL VC IN RGF OF ETA (FOR DTMF SUBS.) ‘A’ ‘B’ MCX CSNL SC SC CSNL VC CSND URM ETA RGF SC COM PU/PE CKTS SC MAS TX TR MR MQ GX PC MIS OM SC: Signalling channel VC: Voice channel

CALL PROCESSING RECEPTION OF FIRST DIGIT
FIRST DIGIT IS RECEIVED VIA VOICE CHANNEL VC IN RGF OF ETA (FOR DTMF SUBS.) ETA SENDS IT TO MR ON MAS DIAL TONE IS CUT OFF ON ORDERS OF MR ‘A’ ‘B’ MCX CSNL SC SC CSNL VC CSND URM ETA RGF SC COM PU/PE CKTS SC MAS TX TR MR MQ GX PC MIS OM SC: Signalling channel VC: Voice channel

CALL PROCESSING DIGIT ANALYSIS
FIRST FEW DIGITS ARE PRE-ANALYSED ON REQUEST OF MR BY TR REMAINING DIGITS MAY BE STILL BEING RECEIVED ‘A’ ‘B’ MCX CSNL SC SC CSNL VC CSND URM RGF SC COM PU/PE CKTS SC MAS TX TR MR MQ GX PC MIS OM SC: Signalling channel VC: Voice channel

CALL PROCESSING SELECTION
ANALYSIS OF DIGITS COMPLETED CALLED PARTY COS OBTAINED ROUTING OF CALL - MR ORDERS CSN-B TO TEST ‘B’ & GIVE VC FOR ‘B’ CSN-B TESTS ‘B’ AND GIVES RINGING TO ‘B’ MCX GIVES RBT TO ‘A’ ‘A’ ‘B’ MCX CSNL SC SC CSNL A B VC CSND URM RGF SC COM PU/PE CKTS SC MAS TX TR MR MQ GX PC MIS OM SC: Signalling channel VC: Voice channel

CALL PROCESSING CALLED PARTY ANSWERS CALLED PARTY B GOES OFF HOOK
CALLED PARTY’S CSN SENDS LOOP CONDITION & VC-B INFORMATION TO MR OVER SC VIA PUPE RINGING CURRENT & RBT ARE STOPPED ‘A’ ‘B’ MCX CSNL SC SC CSNL VC-B VC-A CSND URM RGF SC COM PU/PE CKTS SC MAS TX TR MR MQ GX PC MIS OM SC: Signalling channel VC: Voice channel

CALL PROCESSING BOTHWAY CONNECTION
TWO UNIDIRECTIONAL CONNECTIONS ARE ESTABLISHED IN MCX ON ORDER OF MR VIA GX BETWEEN VC-A & VC-B ‘A’ & ‘ B ‘ CAN NOW CONVERSE ‘A’ ‘B MCX CSNL SC SC CSNL VC-B VC-A CSND URM RGF SC COM PU/PE CKTS SC MAS TX TR MR MQ GX PC MIS OM SC: Signalling channel VC: Voice channel

CALL PROCESSING CHARGING (METERING)
TWO UNIDIRECTIONAL CONNECTIONS ARE ESTABLISHED IN MCX ON ORDER OF MR VIA GX ‘A’ & ‘ B ‘ CAN NOW CONVERSE CHARGING IS STARTED BY TX - MR RELEASED ‘A’ ‘B MCX CSNL SC SC CSNL VC-B VC-A CSND URM RGF SC COM PU/PE CKTS SC MAS TX TR MR MQ GX PC MIS OM SC: Signalling channel VC: Voice channel

OCB-283 EXCH AND YOUR METER IS RUNNING HERE!!!

HARDWARE ARCHITECTURE OF OCB-283

HARDWARE ARCHITECTURE OF OCB-283
16 LR’S CSNL MCX STS 1x3 PCM CSND LR SMT (1 TO 64)x2 SMX (1 TO 8)x2 2TO 16 CSED LR 2 TO 4 SMA 2 TO 64 CIRCUITS MAS (1 TO 4) A&B SMC (2 TO 32) SMC MIS 1 A&B VDU TTY SMM OPERATION &MAINTENANCE TERMINALS CONTROL TERMINAL LINK TO TMN

OCB-283 COMPONENTS 1. SUBSCRIBER ACCESS UNIT CSN :- CALLED DIGITAL SUBSCRIBER CENTRE CSN IT CAN BE LOCAL -> CSNL OR DISTANT ->CSND 2.CIRCUIT TERMINATION UNIT SMT :- CIRCUITS ARE TERMINATED ON TRUNK MULTIPLEX CONNECTION UNIT ITS FUNCTION IS CALLED URM

OCB-283 COMPONENTS 3. COMMON CONTROL UNITS:
CALLED MAIN MULTIPROCESSOR CONTROL STATION SMC , CONTROL UNITS SUPPORT FOLLOWING CONTROL FUNCTIONS MR,TR,TX,MQ,GX,& PC IN SOFTWARE FORM 4. AUXILIARY UNITS:- CALLED SMA THESE UNITS SUPPORT FUNCTIONS FOR SIGNALS & TONES: ETA & PU/PE

OCB-283 COMPONENTS 5. SWITCHING MATRIX UNIT
CALLED SWITCHING MATRIX STATION SMX COMPRISES OF SWITCHING MATRIX->MCX SWITCHING SOFTWARE FUNCTION CALLED -> COM 6.OPERATION & MAINTENANCE UNIT SMM :- ITS FUNCTION IS CALLED OM 7. COMMUNICATION MULTIPLEX:- THESE ARE MIS & MAS

HARDWARE STATIONS OF OCB-283
CSN : SUBS.ACC UNIT SMC :MAIN CONTROL STATION SMA :AUXILIARY EQPT CONTROL STATION SMT :TRUNK CONTROL STATION SMX :MATRIX CONTROL STATION SMM :MAINTENANCE STATION STS :SYNCH. TIME BASE MIS :INTERSTATION COMM. MULTIPLEX MAS :STATION ACCESS COMM. MULTIPLEX CSNL MCX STS CSND PCM SMT SMX CSED SMA CIRCUITS MAS SMC SMC SMC MIS VDU TTY SMM OPERATION &MAINTENANCE TERMINALS CONTROL TERMINAL LINK TO TMN

CSN: SUBS. ACCESS UNIT CSNL MCX STS CSND PCM SMT SMX CSED SMA CIRCUITS MAS SMC SMC SMC MIS VDU TTY SMM OPERATION &MAINTENANCE TERMINALS CONTROL TERMINAL LINK TO TMN

CSN :SUBS.ACC UNIT SMC :MAIN CONTROL STATION CSNL MCX STS CSND PCM SMT SMX CSED SMA CIRCUITS MAS SMC SMC SMC MIS VDU TTY SMM OPERATION &MAINTENANCE TERMINALS CONTROL TERMINAL LINK TO TMN

CSN :SUBS.ACC UNIT SMC :MAIN CONTROL STATION SMA :AUXILIARY EQPT CONTROL STATION CSNL MCX STS CSND PCM SMT SMX CSED SMA CIRCUITS MAS SMC SMC SMC MIS VDU TTY SMM OPERATION &MAINTENANCE TERMINALS CONTROL TERMINAL LINK TO TMN

CSN :SUBS.ACC UNIT SMC :MAIN CONTROL STATION SMA :AUXILIARY EQPT CONTROL STATION SMT :TRUNK CONTROL STATION SMX :MATRIX CONTROL STATION CSNL MCX STS CSND PCM SMT SMX CSED SMA CIRCUITS MAS SMC SMC SMC MIS VDU TTY SMM OPERATION &MAINTENANCE TERMINALS CONTROL TERMINAL LINK TO TMN

CSN :SUBS.ACC UNIT SMC :MAIN CONTROL STATION SMA :AUXILIARY EQPT CONTROL STATION SMT :TRUNK CONTROL STATION SMX :MATRIX CONTROL STATION SMM :MAINTENANCE STATION CSNL MCX STS CSND PCM SMT SMX CSED SMA CIRCUITS MAS SMC SMC SMC MIS VDU TTY SMM OPERATION &MAINTENANCE TERMINALS CONTROL TERMINAL LINK TO TMN

CSN :SUBS.ACC UNIT SMC :MAIN CONTROL STATION SMA :AUXILIARY EQPT CONTROL STATION SMT :TRUNK CONTROL STATION CSNL MCX STS CSND PCM SMT SMX CSED SMA CIRCUITS MAS SMC SMC SMC MIS VDU TTY SMM OPERATION &MAINTENANCE TERMINALS CONTROL TERMINAL LINK TO TMN

CSN :SUBS.ACC UNIT SMC :MAIN CONTROL STATION SMA :AUXILIARY EQPT CONTROL STATION SMT :TRUNK CONTROL STATION SMX :MATRIX CONTROL STATION SMM :MAINTENANCE STATION STS :SYNCH. TIME BASE CSNL MCX STS CSND PCM SMT SMX CSED SMA CIRCUITS MAS SMC SMC SMC MIS VDU TTY SMM OPERATION &MAINTENANCE TERMINALS CONTROL TERMINAL LINK TO TMN

CSN :SUBS.ACC UNIT SMC :MAIN CONTROL STATION SMA :AUXILIARY EQPT CONTROL STATION SMT :TRUNK CONTROL STATION SMX :MATRIX CONTROL STATION SMM :MAINTENANCE STATION STS :SYNCH. TIME BASE MIS :INTERSTATION COMM. MULTIPLEX CSNL MCX STS CSND PCM SMT SMX CSED SMA CIRCUITS MAS SMC SMC SMC MIS VDU TTY SMM OPERATION &MAINTENANCE TERMINALS CONTROL TERMINAL LINK TO TMN

CSN :SUBS.ACC UNIT SMC :MAIN CONTROL STATION SMA :AUXILIARY EQPT CONTROL STATION SMT :TRUNK CONTROL STATION SMX :MATRIX CONTROL STATION SMM :MAINTENANCE STATION STS :SYNCH. TIME BASE MIS :INTERSTATION COMM. MULTIPLEX MAS :STATION ACCESS COMM. MULTIPLEX CSNL MCX STS CSND PCM SMT SMX CSED SMA CIRCUITS MAS SMC SMC SMC MIS VDU TTY SMM OPERATION &MAINTENANCE TERMINALS CONTROL TERMINAL LINK TO TMN

CSN : SUBS.ACC UNIT SMC :MAIN CONTROL STATION SMA :AUXILIARY EQPT CONTROL STATION SMT :TRUNK CONTROL STATION SMX :MATRIX CONTROL STATION SMM :MAINTENANCE STATION STS :SYNCH. TIME BASE MIS :INTERSTATION COMM. MULTIPLEX MAS :STATION ACCESS COMM. MULTIPLEX CSNL MCX STS CSND PCM SMT SMX CSED SMA CIRCUITS MAS SMC SMC SMC MIS VDU TTY SMM OPERATION &MAINTENANCE TERMINALS CONTROL TERMINAL LINK TO TMN

STANDARD CONFIGURATIONS OF OCB-283 COMPACT (C) CONFIGURATION
SMC : 2 SMA : 2 SMT : 1 SMX : 1 (48 LR) SMC CAN BE LOADED WITH MR,TR,TX,MQ, GX &PC SOFTWARE SMA CAN BE LOADED WITH ETA,PUPE SOFTWARE PERFORMANCE DATA:- 5 CA/S OR 18000 BHCA CSNL MCX STS CSND PCM SMT SMX CSED SMA CIRCUITS M IS SMC VDU TTY SMM OPERATION &MAINTENANCE TERMINALS CONTROL TERMINAL LINK TO TMN

STANDARD CONFIGURATIONS OF OCB-283 SMALL ( P) CONFIGURATION
SMC : BACKUP SMA : 2 SMT : 1 SMX : 1 SMC CAN BE LOADED WITH MR,TR,TX,MQ, GX &PC SOFTWARE SMA CAN BE LOADED WITH ETA,PUPE SOFTWARE PERFORMANCE DATA:- 36 CA/S OR 1,30000 BHCA CSNL MCX STS CSND PCM SMT SMX CSED SMA CIRCUITS MAS SMC SMC MIS VDU TTY SMM OPERATION &MAINTENANCE TERMINALS CONTROL TERMINAL LINK TO TMN

STANDARD CONFIGURATIONS OF OCB-283 MEDIUM (M) CONFIGURATION
SMC : 2 OR 3 MR+2=5 SMA : 2 OR MORE SMT : 1 OR MORE SMX : 1 OR MORE 2 SMC’S CAN BE LOADED WITH TR,TX,MQ,GX &PC SOFTWARE SMA CAN BE LOADED WITH ETA,PUPE SOFTWARE PERFORMANCE DATA:- 100 CA/S OR 3,60000 BHCA CSNL MCX STS CSND PCM SMT SMX CSED SMA CIRCUITS MAS SMC SMC MIS VDU TTY SMM OPERATION &MAINTENANCE TERMINALS CONTROL TERMINAL LINK TO TMN

STANDARD CONFIGURATIONS OF OCB-283 LARGE (G) CONFIGURATION
SMC : 4 TO 7 MR+2 TX+2 SMC SMA : 2 OR MORE SMT : 1 OR MORE SMX : 1 OR MORE 2 SMC CAN BE LOADED WITH TR,MQ,GX &PC SOFTWARE SMA CAN BE LOADED WITH ETA,PUPE SOFTWARE PERFORMANCE DATA:- 220 CA/S OR 800,000 BHCA CSNL MCX STS CSND PCM SMT SMX CSED SMA CIRCUITS MAS SMC SMC MIS VDU TTY SMM OPERATION &MAINTENANCE TERMINALS CONTROL TERMINAL LINK TO TMN

SWITCHING PRINCIPLE AND DESIGN OF OCB-283

SWITCHING PRINCIPLE 1.OCB-283 SWITCH WORKS ON SINGLE STAGE
TIME SWITCHING PRINCIPLE CALLING PARTY’S TIME SLOT X CALLING PARTY’S TIME SLOT X LRE (X) LRS (X) INCOMING LINKS OUT GOING LINKS Y Y LRE (Y) LRS (Y) CALLED PARTY’S TIME SLOT CALLED PARTY’S TIME SLOT 2. OCB-283 SWITCH PERFORMS SWITCHING IN TWO PARELLEL SWITCHING EQUIPMENTS SIMULTANEOUSLY FOR EVERY CALL

OUTGOING LINK CARRYING 2048
INCOMING LINK CARRYING 2048 TIME SLOTS OF 64 INTERNAL LINK EACH OF 32 TIME SLOTS SINGLE STAGE TIME SWITCH CONCEPT X-->Y UNIDIRECTIONAL TS X TS 0 INLET Sequential Write 1 X 64x32-1 =2047 SPEECH BUFFER MEMORY X SPEECH OF X Controlled Read TS Y TS0 OUT LET X C O N T R O L U N I T OUTGOING LINK CARRYING 2048 TIME SLOTS OF 64 INTERNAL LINK EACH OF 32 TIME SLOTS Controlled Write 1 Y 64x32-1 =2047 X CONTROL MEMORY Sequential Read Y X

SWITCHING IN OCB-283 SMX-A X Y SMX-B IN TWO BRANCHES OF SMX
CONNECTION UNIT ‘X’ SAB A LRS X(A) LRE X(A) X LRE Y(A) SAB B MLCOM LRS Y(A) LRS X(B) CONNECTION UNIT ‘Y’ SAB A LRE X(B) LRE Y(B) Y MLCOM LRS Y(B) SAB B SWITCHING IN OCB-283 IN TWO BRANCHES OF SMX SMX-B

TYPICAL OCB-283 EXCHANGE PCMS SMC1 SMC2 SMC3 SMC4 SMC5 SMMA SMMB SMX 1
CSNL SMT SMA 2 3 4 5 6 7 8 MAS 2 (A & B) MAS 1 (A & B) MIS A & B OCB-283 DIAGRAM TOKEN RINGS MIS MAS 1 & MAS 2 GLR( A & B) GLR (A & B) EXCHANGE PCMS

SPEECH PATH IN OCB-283 GLR( A & B) GLR (A & B) 3 4 5 6 7 8 1 2 S M X 1
3 4 5 6 7 8 1 2 S M X 1 B CSNL 1 1 2 3 SMA 1 SMA 2 SMA 3 SMT SMX 1 A MAS 2 (A & B) SPEECH PATH IN OCB-283 SMC1 SMC2 SMC3 SMC4 SMC5 MIS A & B TOKEN RINGS MIS MAS 1 & MAS 2 SMMA SMMB OCB-283 EXCHANGE

SPEECH PATH IN OCB-283 SUBSCRIBER. ACCESS SMX SMX SWITCHING MATRIX
NETWORK LINK LR’s (GROUP OF LR’s) CSNL GLR 0B GLR 1B SMX 1 GLR =8 LRs GLR 0A GLR 1A SMX 8 B GLR B 1 2 3 SMT 2 B PCM 1 B SWITCHING MATRIX GLRA 1 2 3 B SWITCH 8 A PCM CIRCUIT CONNECTION EQPT. 2 A GLR OB 1 A A SWITCH GLR OA AUXILIARY EQPT SMA SPEECH PATH IN OCB-283

SPEECH PATH IN OCB-283 SPEECH PATH IN OCB-283 CONSISTS OF
SUBSCRIBER ACCESS UNITS CSNs TRUNK MULTIPLEX CONNECTION STATION UNITS SMTs AUXILIARY EQUIPMENT STATION UNITS SMAs SWITCHING MATRIX STATIONS SMXs NETWORK LINKS LR’s

SUBSCRIBER ACCESS IN OCB-283 CSNL & CSND CONFIGURATION
SWITCH 256 SUBS CSN BASIC RACK CNE CNL 256 SUBS PCM 256 SUBS CSN BASIC RACK CNL 256 SUBS. PCM PCM CNE CSND

SUBSCRIBER ACCESS UNITS
CSNL OR CSND RACKS BASIC RACK LINKS TO LR SMX T C R M GTA UCX1 UCX0 TOND CNL OR ICNE T C R M CNL OR ICNE T R C M CNL OR ICNE CNL OR ICNE T C R M CNL OR ICNE T R C M CNL OR ICNE CNL OR ICNE CNL OR ICNE CNL OR ICNE EXTENSION RACKS

SUBSCRIBER ACCESS UNITS
CSNL OR CSND RACKS T C R M GTA UCX1 UCX0 TOND CNL OR ICNE LINKS TO LR SMX R C T M GTA UCX1 UCX0 TOND CNL OR ICNE R C T M CNL OR ICNE CNL OR ICNE CNL OR ICNE M R C T CNL OR ICNE R C T M CNL OR ICNE CNL OR ICNE R C T M CNL OR ICNE CNL OR ICNE CSN BASIC RACK

CSNL OR CSND SHELF NAMES
BASIC RACK POWER SUPP INTERFACE T C R M TOND TBALAM TOND T C R M INTERFACE WITH EXCHANGE UCX0 UCX1 GTA TBUCN T C R M CNL OR ICNE TBABM2 T C R M CNL OR ICNE TBABM2 T C R M CNL OR ICNE TBABM2 T C R M CNL OR ICNE TBABM2

CSN BASIC RACK FOR CSNL 1 GLR= 8 LRS TWO GLR/CSN GLR TO GLR TO
SMX B GLR TO SMX A GLR0 &1(A) GLR 0&1(B) AUX. EQPT T C R M GTA UCX1 UCX0 TOND CONTROL LOGICS CSN BASIC RACK FOR CSNL T C R M CNL OR ICNE SUBS. CONNECTION SHELFS T C R M CNL OR ICNE PCM CNE T C R M CNL OR ICNE T C R M CNL OR ICNE 1 GLR= 8 LRS TWO GLR/CSN

CSN HARDWARE CONFIGURATION DIGITAL CONTROL UNIT UCN
CSND BASIC RACK IN CASE OF CSNL TCILR IN CASE OF CSNL TCBTL T R S T B A L N U C T R S 1 3 T R S T C O B T B D T B D A T C R M TOND 80 (0) T C R M ~ 40 V T R S 2 T S U R V 2 T S U R V 2 T S U R V 2 T S U R V 2 TOND 80 (1) ~40 V T 5 V 1 7 T R C X T R C X T R C X T M Q R T M U C 2 T P U C B T C S T C S T H L R T H L R T R F 8 B * T R F 8 B * T F I L M B * T C S T C S T P U C B T M U C 2 T M Q R T R C X T R C X T P O S T C R M T R C X T M L A B T S U C T 5 V 1 7 UCX0 UCX1 GTA * PCB’S NOT USED IN CSNL

CSN BASIC RACK FOR CSND 1 GLR= 8 LRS TWO GLR/CSN 2 ~ 16 PCMS TOWARDS
EXCHANGE AUX. EQPT T C R M GTA UCX1 UCX0 TOND CONTROL LOGICS CSN BASIC RACK FOR CSND T C R M CNL OR ICNE SUBS. CONNECTION SHELFS T C R M CNL OR ICNE PCM CNE T C R M CNL OR ICNE T C R M CNL OR ICNE 1 GLR= 8 LRS TWO GLR/CSN

CSN EXTENSION RACK REMOTE SUBS. CONN. CNE PCM CNL OR ICNE CNL OR ICNE
LOCALSUBSS. CONCENTRATOR CNL OR ICNE REMOTE SUBS. CONN. CNL OR ICNE CNL OR ICNE CNE REMOTESUBSS. CONCENTRATOR INTERFACE PCM CNL OR ICNE CNL OR ICNE

EXPANDED VIEW OF C N L SHELF
CNL OR ICNE EXPANDED VIEW OF C N L SHELF CNL OR ICNE T A B 1 P O L H R 15 C R M T CNL OR ICNE

CN :- DIGITAL SUBS. CONCENTRATOR
DETAILS OF CN SHELF SUBSCRIBER CARDS 16 SUBS / CARD MAX. 16 CARDS T A B T A B T A B T A B T P O L T H L R T H L R T A B T A B T C R M CN :- DIGITAL SUBS. CONCENTRATOR MAXIMUM 256 SUBS./SHELF

SWITCHING MATRIX STATION : SMX
SWITCHING MATRIX SYSTEM CONSISTS HOST SWITCHING MATRIX MCX IN SMX * MCX PROVIDES:- 16 BIT DIGITAL SWITCHING MATRIX OF x LR’S IT HOLDS THE MLCOM SOFTWARE SMX GETS MBITS/S MATRIX LINKS (LRs) IN THE FORM OF GROUP OF 8 LRs CALLED GLR SWITCHING IN IS DONE SIMULTANEOUSLY IN TWO BRANCHES (A & B) OF INDEPENDENT SWITCHES BRANCH AMPLIFICATION & SELECTION FUNCTION SAB FOR CONNECTING LR s TO SMXs OF RESPECTIVE BRANCH IS SITUATED IN CONNECTION UNITS THERE ARE 8 MODULAR SWITHES CALLED SMX1 TO SMX8 IN EACH BRANCH

SWITCHING MATRIX SCHEMETIC
SINGLE STAGE TIME SWITCHING SWITCHING CAPACITY-2048 LR’S 1 LR IS 32 CHANNEL PCM USED FOR VOICE LR0 LR255 LR0 LR255 LR 2047 .T. 1 2 3 4 5 6 7 8 COM LR 2047

SWITCHING MATRIX BLOCK DIAGRAM
256x256 SQUARE MATRICES LRE 0 LRE 255 LRS 0 LRS 255 SMX 1 LR E 256 LRE 511 LRS 256 LRS 511 SMX 2 LRE 512 LRE 767 LRS 512 LRS 767 SMX 3 LRE 768 LRE 1023 LRS 768 LRS 1023 SMX 4 SWITCHING MATRIX BLOCK DIAGRAM

256x256 SQUARE MATRIX EXPANDED VIEW
128~191 0~63 I/L 64x64 0~63 O/L 256x256 SQUARE MATRIX EXPANDED VIEW 64~127 O/L 64 x64 BASIC SQUARE MATRIX 128~191 O/L 192~255 O/L 64~127 192~255

TWO WAY SWITCHING OF TIME SLOTS OF X->Y & Y->X
IN SINGLE STAGE TIME SWITCH OF OCB-283 SWITCHING FROM X-Y SWITCHING FROM Y-X I/C LINK CARRYING 2048 TIME SLOTS OF 64 LRE LINK EACH OF 32 TIME SLOTS I/C LINK CARRYING 2048 TIME SLOTS OF 64 LRE LINK EACH OF 32 TIME SLOTS TS X TS 0 TS Y TS 0 INLET INLET W 1 X 64x32-1 =2047 SPEECH BUFFER MEMORY W 1 Y 64x32-1 =2047 SPEECH BUFFER MEMORY SPEECH OF X SPEECH OF Y R R OUT LET TS2047 Y TS0 OUT LET TS2047 X TS0 C O N T R L U I C O N T R L U I W 1 y 64x32-1 =2047 W 1 X 64x32-1 =2047 CONTROL MEMORY CONTROL MEMORY X Y R R SWITCH OF Y BASIC 64x64 SQUARE MATRIX CORRESPONDING TO LRE OF X SWITCH OF X BASIC 64x64 SQUARE MATRIX CORRESPONDING TO LRE OF Y

SWITCHING RACKS OF OCB-283 (FOR 1024 LRS )
4 SMX SWITCHES IN EACH BRANCH B BRANCH SMX 1 SMX 3 SMX 5 SMX 7 SMX 1 SMX 3 SMX5 SMX 7 SMX 2 SMX 4 SMX6 SMX 8 SMX 1 (EX) SMX2 (EX) SMX 5 (EX) SMX 7 (EX) SMX 2 (EX) SMX 4 (EX) SMX 6 (EX) SMX 8 (EX) A BRANCH

AUXILIARY EQUIPMENT UNITS: SMA
SMA IS THE HARDWARE STATION WHICH SUPPORTS AUXILIARY EQUIPMENT FUNCTIONS -(DOING FOLLOWING JOBS) 1. ETA :PROVIDES TONES : FREQUENCY SENDER & RECEIEVER : FIRST TWO SMA KEEP EXCHANGE CLOCK 2. PUPE :HANDLES COMMON CHANNEL SIGNALING CCS7 PROTOCOLS OF COMMON CHANNEL SIGNAL DATA LINKS . IN PHYSICAL FORM ONE SMAOCCUPIES ONLY ONE SHELF OFA RACK SMA IS CONNECTED TO SWITCHING MATRIX BY ONE GLR (= 8 LR’s) THESE LR’s :- CARRY TONE,FREQUENCY RECEIEVER / SENDER,CONFERENCE CIRCUIT TIME SLOTS FOR ETA & CARRY COMMON CHANNEL SIGNALING TIME SLOTS FROM THE MATRIX (COMING ON DATA LINKS ESTABLISHED IN MATRIX ) TO PUPE SMA IS CONNECTED ON MAS COMMUNICATION MULTIPLEX FOR COMMAND CONTROL

SMA : AUXILIARY EQPT. STATION IN OCB-283
SMC SMC SMA SHELF SMC SMA SMA

TRUNK MULTIPLEX CONTROL STATION : SMT
SMT IS THE HARDWARE STATION WHERE THE EXTERNAL PCMS ARE TERMINATED SMT HARDWARE IS FULLY DUPLICATED IN TWO LOGICS IT OCCUPIES TWO SHELVES OF A RACKS THERE ARE TWO GENERATIONS OF SMT’s SMT 1G CAN CATER TO 32 PCMS SMT 2G CAN CATER TO 128 PCMS SMC SMT(A) PCM TER MIN ATIO ON SMT(B)

CONNECTING OF AUTOMATIC DIGITAL ANNOUNCEMENT IN OCB-283
AUTOMATIC ANNOUNCEMENTS ARE PROVIDED IN OCB-283 AT THE SWITCHING MATRIX IN THE FORM OF DIGITAL RECORDED VOICE MESSAGES STORED IN PCB’s THERE ARE TWO PCB’s :- ICMPN2 ->RAM & VOLATILE MEMORY ICSMP ->EPROM SAVES VOICE-ANN. ( DIGITAL ) THESE TWO CARDS ARE SITUATED IN SMM RACK & THE ANNOUNCEMENTS ARE CARRIED BY ONE PCM LINK FROM ICMPN 2 CONNECTED TO ONE SMT; FROM SMT LINK GOES AS LR LINK TO SMX WHERE ITS TIME SLOTS ARE USED FOR GETTING THE RESPECTIVE ANNOUNCEMENTS. LR LINKS SMM RACK SMT RACK SMX RACK SMT PCM SMT PCM DDF

CONTROL STATIONS OF OCB-283
GLR( A & B) GLR (A & B) 3 4 1 S M CSNL 1 1 2 3 MAIN MULTI PROCESSOR CONTROL STATIONS :SMC PCMS SMT SMC1 SMC2 SMC3 SMC4 SMC5 MIS A & B TOKEN RINGS MIS MAS 1 & MAS 2 SMMA OCB-283 DIAGRAM SMMB OCB-283 EXCHANGE OCB-283 BLOCK DIAGRAM

MAIN CONTROL STATION: SMC
SMC IS THE HARDWARE STATION FOR LOADING COMMON CONTROL FUNCTIONS MR,TR,MQ TX,GX, & PC IN SOFTWARE FORM IN PHYSICAL FORM ONE SMC OCCUPIES ONLY ONE SHELF OF A RACK SMC SMC SMC SMA SMA

MAINTENANCE STATIONS OF OCB-283
GLR( A & B) GLR (A & B) 3 4 5 6 7 8 1 2 S M X 1 B CSNL 1 1 2 3 PCMS SMT SMA 1 SMA 2 SMA 3 SMX 1 A MAINTENANCE STATIONS SMM A&B MAS 2 (A & B) MAS 1 SMC1 SMC2 SMC MIS A & B SMMA SMMB OCB-283 BLOCK DIAGRAM

MAINTENANCE STAIONS SMM(A) & SMM(B)
SMM STATION IN OCB-283 PERFORMS THE O&M FUNCTIONS THE SMM STATION HAS FULL DUPLICATED HARDWARES SMM (A) & (B) ONE OF THE TWO SMM IS PILOT & OTHER WORKS AS HOT STAND-BYE FOR BOTH SMM THERE ARE TWO MIRROR IMAGE HARD DISKS OF 1200 MB CAPACITY- PILOT IS ABLE TO ACCESS EITHER OF DISKS THERE ARE TERMINATIONS FOR PERIPHERALS TTY,VDU FOR OPERATION THERE ARE UPTO 4 ALARM RECEPTION RINGS

SMM DIALOGUES WITH ALL SMC’S OVER MIS TOKEN RING ADJACENT TO SMM THERE IS ONE MAG-TAPE DRIVE UNIT : DBM THERE IS ONE STREAMER FOR CARTRIDGE DRIVE IN SMM RACK SMM RECEIVES ALL ALARMS FROM WHOLE EXCHANGE ON ALARM RING MAL SMM STATION OCCUPIES 3 SHELVES OF A RACK SMM RACK ALSO HAS DIGITAL VOICE ANNOUNCEMENT SYSTEM IN 4TH SHELF

SMM A&B ALONGWITH ALARM RING & ANNOUNCEMENT CARDS OCCUPIES THREE SHELVES OF A RACK SMM RACK ALSO KEEPS STS EQPT. DBM RACK IS INSTALLED ADJACENT TO THIS STS DISK 1 SMM A ALARMS ANNOUNCE PERIPH SMMB DISK 2

COMMUNICATION MULTIPLEXES
GLR( A & B) GLR (A & B) 3 4 5 6 7 8 1 2 S M X 1 B CSNL 1 PCMS 1 2 3 SMT SMA 1 SMA 2 SMA 3 SMX 1 A MAS 2 (A & B) MAS MAS 1 (A & B) SMC1 SMC2 SMC3 SMC4 SMC5 MIS A & B MIS SMMA TOKEN RINGS MIS MAS 1 & MAS 2 OCB-283 DIAGRAM SMMB MAL MAS : MAS CAN BE FROM 0 TO 4 RINGS & ARE DUPLICATED AS A & B MIS : MIS IS ONE RING DUPLICATED AS A & B MAL : ALARM RINGS CAN BE UPTO 5 AND DUPLICATED AS A & B

COMMUNICATION MULTIPLEXES
COMMUNICATION MULTIPLEXES ARE THE HIGHWAYS OF COMMUNICATION BETWEEN VARIOUS CONTROL STATIONS OF OCB-283 THERE ARE THREE TYPE OF COMMUNICATION MULTIPLEXES: MAS TOKEN RING :-STATION ACCESS MULTIPLEX ,IT IS BETWEEN CONNECTION STATIONS (EXCEPT CSN) AND ALL SMC’s SWITCHING STATIONS AND ALL SMC’s MIS TOKEN RING :- INTERSTATION MULTIPLEX, IT IS BETWEEN ALL SMC’s AND SMM MAL RING :-ALARM MULTIPLEX RING, IT IS FOR COLLECTING H/W ALARMS OF ALL STATIONS EXCEPT CSN NOTE:- ALL COMMUNICATION BETWEEN CSN & REST OF THE EXCHANGE EQUIPMENTS IS DONE VIA COMMON SIGNALING CHANNELS CALLED COC:-COC0= (TS16-LR0 )& COC1=(TS16-LR1)

PCWAM PCWAM : PERSONAL COMPUTER WORK ACCESS METHOD PC WAM
IT IS A SPECIAL SOFTWARE LOADED IBM PC IT IS THE TERMINAL OF SMM WHICH IS CONNECTED TO S-BUS OF SMM DIRECTLY IT IS USED FOR HARDWARE TESTING/LOCAVAR OF SMM COMPONENTS : SMM STATION,HARD DISK,MAGTAPE MIS SMM CONTROL TERMINAL PC WAM PC WAM

PGS / T I PGS / T I : GENERAL VISUAL DISPLAY CUM INTELLIGENT TERMINAL
IT IS A SPECIAL SOFTWARE LOADED IBM PC IT IS ONE OF THE PERIPHERAL TERMINAL OF SMM WORKING ON ASYNC.LINE FOR O&M IT SHOWS THE GENERAL DISPLAY OF ALARMS IN EXCHANGE IT PROVIDES ASSISTANCE IN MAN-MACHINE COMMANDS IN TI:INTELLIGENT MODE MIS SMM CONTROL TERMINAL PGS/TI

CONTROL TERMINALS CONTROL TERMINASL
MIS CONTROL TERMINASL THESE ARE SYSTEM VIDEO TERMINALS CONNECTED TO SMM THESE ARE USED FOR MANUAL RESTART & STOPPING OF SMM THESE INTERACT DIRECTLY WITH ‘REAL TIME OPERATING SYSTEM’ OF SMM COMPUTER SMM CONTROL TERMINAL

OPERATORS VDU TERMINALS
OPERATORS TERMINASL THESE ARE ORDINARY VIDEO TERMINALS CONNECTED TO SMM ON LAS LINKS THESE ARE USED BY THE OPERATORS FOR GIVNING MA-MACHINE COMMANDS FOR NAORMAL OPERATION & MAINTENANCE OF THE OCB-283 EXCHANGE THESE ARE PROVIDED WITH A ORINTER FOR TAKING THE HARD COPY UPTO 32 OPERATORS TERMINALS CAN BE PROVIDED IN A EXCHANGE MIS SMM CONTROL TERMINAL VDU PRINTER

HARDWARE EQUIPMENT’S STATUS INTERROGATION
MAINTENANCE COMMANDS HARDWARE EQUIPMENT’S STATUS INTERROGATION @ ESMIN: @ AM=SMX; OR AM=SMXn; OR AM=SMXAn; OR AM=SMXBn; @ TELIN: @ AFUR=1<63; @ ESMIN: @AM=SMA; OR AM=SMAx; GLR A & B GLR A & B @ ESMIN: @ AM=SMT; OR @ AM=SMTx; @ AM=SMTAx; OR AM=SMTBx; CSNL 3 4 5 6 7 8 1 2 S M X 1 B 1 1 2 3 SMT SMA 1 SMA 2 SMA 3 SMX 1 A MAS 2 (A & B) @ AMXIL: @ AMX=MIS; OR AMX=MAS; OR AMX= MISA OR AMX=MISB OR AMX=MASAn; OR AMX=MASBn; MAS 1 (A & B) @ ESMIN: @ AM=SMC; OR @ AM=SMCx; @ ; OR SMC1 SMC2 SMC3 SMC4 SMC5 MIS A & B TOKEN RINGS MIS MAS 1 & MAS 2 @ AM=SMM; OR SMMA; OR SMMB; SMMA OCB-283 DIAGRAM SMMB

ADDRESSING OF GLR ‘s WITH RESPECT TO CONNECTION UNITS & WRT TO SMX
IN OCB-283 SOFTWARE AFGRU=UR-GLR AFGRX=SMX-GLR CSNn AFUR=n AFGRU=n-0 AFGRX=1-2 1 2 3 31 AFGRU=n-1 AFGRX=1-3 AFGRX=1-15 SMX1 ( A &B) AFGRX=1-29 AFGRA=SMA-GLR AFGRX=2-8 AFGRX=2-11 SMX2 ( A &B) SMAn AM=SMAn AFGRA=n-0 AFGRX=3-3 SMX3 ( A &B) AFGRT= SMT-GLR PCM SMTn AM=SMTn AFGRT=n-0 AFGRT=n-1 AFGRT=n-2 SMX8 ( A &B) AFGRT=n-3 CONNECTION OF LR’s IN THE FORM OF GROUP OF LR’s-> GLR TO SWITCHING MATRIX STATION SMX

PROTECTION OF CONNECTIONS IN SPEECH PATH
OCB-283 SWITCHING SUBSYSTEM PROTECTION OF CONNECTIONS IN SPEECH PATH 1. CHECKING OF CONNECTIONS : *THERE ARE TWO TYPES OF CHECKS - PERMANENT CHECK -> ->ALWAYS ACTIVE FOR ALL CHANNELS - CHECK ON REQUEST -> -> ACTIVATED ON DEMAND CONCERNS TO ONLY LIMITED CHANNELS *METHODS OF CHECKING CHECK BY TRANSMISSION CHECK COMPARISON OF IN EACH BRANCH BRANCHES SEPARATELY SIMPLE SOPHISTICATED MEANS:- PARITY PARITY CRC TYPE :- PERMANENT PERMANENT ON REQUEST

DEFINITION OF ADDITIONAL BITS IN SAB FUNCTION
SWITCHING IN OCB-283 DEFINITION OF ADDITIONAL BITS IN SAB FUNCTION ADDITIONAL BITS SMX 8 SPEECH BITS 8 SP 8 ADD S A B TSi TSi 3.9 mics 3.9 mics LAE LRE A&B LAS CONNECTION UNIT LRS A&B 8 SPEECH BITS MODES OF OPERATION ADDITIONAL 8 BITS PERMANENT MODE MULTIFRAME MODE BIT 13 =0 BIT 13=1 (SYNC WORD) BIT 14=0 (HOMOLOGOUS RESULT BIT 14=CONTROL BIT OF LRS A&B TSi ON LRE-TSi :IF NOT,=1) BIT 15= PARITY BIT 15= CRC BIT

PHYSICAL DIMENSIONS OF OCB-283
Rack Size in : 2000 Hx 950 Wx 690 D (mm) No of Rows (Suits) in a Switch Room : Not Fixed No of Racks per suite : Not Fixed but for practical convenience may be limited upto 16 Inter Suite Gap : Min. 800 mm to 1000 mm Max:- Variable Clearance from Sidewalls : 1500 mm Height of Ceiling Minimum : 3000 mm Approximate floor area for a 6k exchange : 44 sq m Sequence of lay out of racks in suites : No special sequence or restriction (other than specific to site) except for following CA & DBM racks to be installed together preferably in middle of Suites of racks XA Racks to be installed in continuity & in Identical locations in two suites for the branches A & B

OCB-283 RACKS - Front View CA DBM CB CC XA UA UB UC CSN-BASIC
1 SMC +STS+SMMA/B SMC STS SMMA AL ANN PER SMMB DBM MTU CB SMC SMA 3 SMC + 2 SMA CC SMC 5 SMCs XA SMX1 SMX2 SMX E Only SMX’s UA SMC SMT-A SMT-B 1 SMC+ 2 SMT’s 2000mm UB SMC SMT-A SMT-B SMA 1 SMC+1 SMT +2 SMA UC 1SMC+ 4 SMA CSN-BASIC CNL0 CNL1 CNL2 CNL3 UCN+ 4 CNL(ICNE) UCN CSN-EXTN. CNL5 CNL6 CNL7 CNL8 5 CNL(ICNE) CNL4 UD 1SMC+ 2 SMT’s

LAY OUT OF AN OCB-283 SWITCH ROOM EXAMPLE :-BOMBAY SION TELEPHONE EXCHANGE
SWITCH ROOM ALL DIMENSIONS IN MM TR07 TR06 TR05 TR04 CSN 030 031 040 041 050 051 060 061 XA2B XA1B UC2 UD1 010 011 XA2A XA1A CB1 SDE1 UC1 CA DBM 020 021 UE1 1500 800 690 950 I R P VDU VDU VDU VDU OPERATION ROOM ACDB

CONNECTION UNITS’ UR DESIGNATION NUMBERING IN OCB-283
TYPE OF CONN.UNIT S/W MACHINE RANGE OF UR NO.S CSN MLCSN 1TO UR PER CSN SMT MLURM TO 64 STARTING FROM HIGHEST 8 MODULE OR UR NO PER SMT UR NO FOR FIRST MODULE FOR SMT 1G & OF FIRST SMT MOD. OR UR PER SMT-2G SMA MLETA/ TO 224 MLPUPE 1 UR NO PER SMA UR NUMBERING SCALE UR # SMT20 SMT 1 CSN 1~63 SMA32 SMA1

MODULARITY OF LR’s (30 voice channel carrying links)
DIMENSIONING OF OCB-283 CALCULATING LR ‘s MODULARITY OF LR’s (30 voice channel carrying links) Minimum 8 LRs called GLR can be installed TYPE OF CONN. UNIT LR REQUIRED GLRS CSNL SMT 1G SMT 2G SMA Calculate based upon Total Subscriber Number & TRAFFIC PER LINE the No of CSNL racks required & GLRs Calculate based upon the projected circuit traffic the total No of Circuits needed & Calculate No of SMTs & GLRs Calculate based upon the projected Signalling traffic the total No of RF & PUPE needed & Calculate No of SMAs & GLRs

CALCULATING SWITCHING MATRIX SIZE MODULARITY OF SMX
DIMENSIONING OF OCB-283 CALCULATING SWITCHING MATRIX SIZE MODULARITY OF SMX SMX :- Maximum 256 LRs or 32 GLRs/SMX XA RACK:- 2 SMX STATIONS/ XA RACK RCID CARD SLOTS PER XA RACK =32 TOTAL NO OF SMX STATIONS REQUIRED = TOTAL GLRs/32 TOTAL NO OF XA RACKS NEEDED =TOTAL SMXs/2 WITHIN SMX MODULARITY OF :- RCID CARD 16 LRs or 2 GLRs RCMT CARD 64 LRs or 8 GLRs RCSM CARD 4 PER SMX (IN STEPS OF 1 RCSM/ PAIR OF RCSM FROM RCMT0 TO RCMT7 ) IF GLRs >128 THEN MORE THAN 16 RCMT NEEDED AND SECOND SHELF OF EACH SMX WILL BE USED WITH MORE RCMT’s & RCSMs CARDS AS PER SIZE + 1 RCMP

ETA REQUIREMENT DEPENDS UPON
DIMENSIONING OF OCB-283 CALCULATING SMA MODULARITY OF SMA MINIMUM 2 SMA -> SMA 1 & SMA 2 ( ALWAYS NEEDED) NO OF SMA NEEDED DEPENDS UPON NO OF ETAs REQUIRED NO OF PUPEs REQUIRED ETA REQUIREMENT DEPENDS UPON TOTAL RF (RGF) CIRCUITS REQUIRED TOTAL CCF CIRCUITS REQUIRED ICTSH CARD PROVIDES 8 RGF/CARD OR 8 CCF /CARD : IN SMA 1 & 2 UPTO 7 ICTSH OF RGF TYPE & 1 ICTSH OF CCF TYPE & IN OTHER SMAS 8 ICTSH OF RGF TYPE & 2 ICTSH OF CCF TYPE CAN BE INSTALLED. PUPE REQUIREMENT DEPENDS UPON TOTAL NO OF CCS7 DATA LINKS TO BE TERMINATED ACHIL CARD PROVIDES FOR 16 CCS7 DATA LINKS PER CARD ONE SMA HOLDS MAXIMUM ACHIL CARD GIVING 1 PUPE ONE PUPE IS KEPT SPARE AS STANDBYE

CALCULATION OF SMCs DIMENSIONING OF OCB-283 MLMQ,MLGX & MLPC
SMCs ARE CALCULATED BASED UPON THE TOTAL PROJECTED TRAFFIC OF THE EXCHANGE BASED UPON THE SPECIFIC TRAFFIC DATA OF THE AREA OF THE EXCHANGE & THE CONFIGURATION OF THE EXCHANGE REQUIRED: SMC’S ARE THE H/W STATION SUPPORTING THE S/W LOGICAL MACHINES ‘ML’ OF COMMON CONTROL FUNCTIONS OF EXCHANGE :- ML -> MR TR TX MQ GX & PC THESE LOGICAL MACHINES ‘ML’ ARE LOADED EITHER INDIVIDUALLY OR IN DEFINITE COMBINATIONS OF ‘ML’s IN SMC’S. THE SIZE OF THE FILES OF FOLLOWING MLs IS FIXED & THE FUNCTIONS OF THESE ‘ML’s ARE DUPLICATED ; (ONLY TWO OF EACH TYPE ) MLMQ,MLGX & MLPC THE SIZE OF FILES OF FOLLOWING ML’s DEPENDS UPON THE TOTAL NUMBER OF SUBSCRIBERS & TOTAL CIRCUITS & THESE ML’S FUNCTIONS ARE ALSO ONLY DUPLICATED ; MLTR & MLTX THE SIZE OF MLTX ALSO DEPENDS UPON TOTAL ERLANGE TRAFFIC TO BE HANDLED BECAUSE IT PROVIDES THE CHARGING REGISTERS WHICH HANDLE THE CALLS DURING THE CONVERSATION PHASE OF CALLS (1 REGISTER/CALL) EACH MLTX HOLDS MACROPROGRAMME MEMORIES IN BLOCKS ; BLOCKS CAN BE MINIMUM 1 TO MAX. 4 EACH BLOCK GIVES (OR 3000) CHARGING REGISTERS

CALCULATION OF SMCs (CONTD ->)
DIMENSIONING OF OCB-283 CALCULATION OF SMCs (CONTD ->) THE MLMR IS THE LOGICAL MACHINE WHICH IS THE OVERALL CONTROLLER OF THE CALL,HENCE IT IS ACTIVE FOR THE LONGEST DURATION DURING PROCESSING , ANALYSIS & SELECTION & SETUP / RELEASE OF CALLS ; THIS IS THE MACHINE WHICH IS REQUIRED TO WORK WITH EVERY EVENT OF THE SUBSCRIBERS/ CIRSUITS DURING SETUP & RELASE . MLMR’s CAN BE MINMUM 2 & MAXIMUM 7 ,& EACH MLMR FUNCTION HANDLES UPTO SIMULTANEOUS CALLS INDEPENDENTLY & ITS MEMEORIES ARE NOT DUPLICATED AN MLMR CAN HAVE TO 4 BLOCKS OF MACRO-PROGRAMME MEMORIES ; EACH BLOCK HOLDS CALL HANDLING REGISTERS , HENCE MAXIMUM REGISTERS PER MLMR =1024 ; 2 REGISTERS PER BLOCK OF MACRO-PROGRAMME DO NOT HANDLE CALLS HENCE NET AVAILABLE REG./BLOCK=254 MAXIMUM REGISTERS / MLMR= AVAILABLE FOR HANDLING CALLS DEPENDING UPON THE TOTAL EXCHANGE’S PROJECTED TRAFFIC & BHCA ( CALLING RATE OF ALL SUBS./CKTS) ; THE TOTAL NUMBER OF REGISTERS REQUIRED IS ESTIMATED. DEPENDING UPON NO. OF REGISTERS REQUIRED - THE ACTUAL MEMEORY SIZE OF MLMR IS OBTAINED & THEN THE NO. OF MLMR’s NEEDED IS DECIDED. MLMR IS HAVING THE LOWEST TRAFFIC HANDLING CAPACITY ,HENCE IT IS THE MOST CRITICAL COMMON CONTROL FUNCTION IN EXCHANGE

CALCULATION OF SMCs (CONTD ->)
LOGICAL MACHINES ARE LOADABLE IN SMC’s IN COMBINATIONS SHOWN IN TABLE -1 & THIS GIVES TRAFFIC HANDLING CAPACITIY OF SMC’S FOR SUCH COMBINATIONS . DEPENDING UPON REQUIRED TRAFFIC HANDLING CAPACITY THE NUMBER OF MLMR’s & THE RIGHT COMBINATIONS OF ML’s IS TO BE SELECTED. MAXIMUM MEMEORY SIZE OF AN SMC IS = 36 MB THEREFORE IF IN THE EXISTING COMBINATIONS, IF THE SIZE OF ANY ‘ML’ INCREASES DUE TO INCREASE IN SIZE OF EXCHANGE EQPTS., OR IN TRAFFIC , THEN ADDITIONAL SMC’s MAY BE REQUIRED TO DE-COMBINE THE ‘ ML’s. NORMALLY IN A MEDIUM SIZE EXCHANGE OF 10 K TO 20 K LINES & (PROPORTIONATE NO. OF CIRCUITS) THERE ARE 5 SMC’S WHICH HOLD THE ML’s AS FOLLOWS; 2 SMC’s WITH ->MLMQ,MLTR,MLTX,MLGX,MLPC 2 SMC’s EXCLUSIVELY FOR - > MLMR1 & MLMR2 1 SMC AS RESERVE OR STANDBYE AS THE NUMBER OF SUBSCRIBERS & CIRCUITS INCREASES OR AS THE TOTAL TRAFFIC INCREASES THERE WILL BE CORRESPONDING NEED OF INCREASE IN SIZE OF MLTR OR MLTX OR BOTH ; THEREFORE ACCORDINGLY, AFTER CALCULATING THE SIZE OF MEMEORIES OF THESE ML’s IT MAY BE REQUIRED TO SHIFT THESE ML’s IN EXCLUSIVE SMC’s OF THEIR OWN. FOR CALCULATING THE MLMR & MLTX REGISTERS THE EMPIRICAL FIGURES OF HANDLING & PROCESSING TIME etc. CAN BE TAKEN FROM THOSE CORRESPONDING TO MR & TX REGISTERS OF E-10B FOR CALCULATING SIZE OF MLTR MEMEORY THE EXISTING SIZE OF MLTR MAY BE TAKEN & PROPORTIONATE INCREASE MAY BE INCORPORATED

TABLE -1 :- TRAFFIC HANDLING CAPACITIES OF SMC’S
COMBINATION OF ML’s TRFC. HANDLING CAP MIN. NO & MAX. OR FUNCTIONS IN SMC CALL ATT./SECOND/SMC NO OF SUCH SMCS 1.MR,MQ,TR,TX,GX,PC CA/S 2.MQ,GX,TR,TX,PC CA/S 3.MQ,GX,PC CA/S 4.TR CA/S 5.TX CA/S 6.MR CA/S Standard Configurations of OCB-283 Exchanges CONFIGURATION OF COMBINATION OF NO OF SMC’S TRAFFIC HANDL- EXCHANGE. MLS IN SMC OF THIS TYPE -ING CAP. OF EXCH. COMPACT C MR,TR,TX,MQ,GX,PC ONLY CA/S OR CA/H SMALL P MR,TR,TX,MQ,GX,PC RES CA/S OR CA/H MEDIUM M TR,TX,MQ,GX,PC CA/SOR CA/H M R ~3 +1 RES LARGE G TR,MQ,GX,PC CA/S OR CA/H MR TO RES TX

POWER DISTRIBUTION & CONSUMPTION IN OCB-283
EXCHANGE GETS POWER FROM V TRIPPLED DC POWER SUPPLY ON CABLES PROVIDED UPTO SDE RACK INSTALLED IN ONE OF TH E ROW FROM SDE THE DC SUPPLY IS DISTRIBUTED FROM RESPECTIVE FUSES TO CONCERNED RACKS : TOTAL CURRENT CONSUMTION OF A TYPICAL OCB-283 EXCHANGE OF 20 K LINES IS APPROXIMATELY = 140 A CURRENT REQUIREMENT OF VARIOUS STATIONS IS GIVEN BELOW CURRENT CONSUMTION INCREASES WITH INCREASE IN SUBSCRIBER & TRAFFIC STATION CURRENT AT 5 V AT 48V SMC 32 A A SMA 24 A A SMX SMT1G 34 A A SMT2G SMM CSN B CSN E SDE RACK FUSES -48V 0 V EXCAHNGE EARTH

CHART OF INSTALLATION ACTIVITIES OF A MEDIUM SIZE OCB-283 EXCHNAGE
IN DAYS

ISDN : THE CONCEPT OF MODERN COMMUNICATION

ISDN : CONCEPT OF FUTUREISTIC HOME & COMMUNICATION YOR FUTURISTIC
HOME IN INDIAN VILLAGE INTERACTIVE SATTELLITE & CABLE TV SERVICES WILL BE CONTROLLED BY HOME COMPUTER ISDN : CONCEPT OF FUTUREISTIC HOME & COMMUNICATION YOU CAN ORDER YOUR CURTAINS TO BE OPENED OR CLOSED DEPENDING UPON WHEATHER YOU CAN ORDER YOUR AC TO ON/OFF OVEN TV YOR ARE HERE IN SOUTH AMERICA ON VACATIONS AT BEACH WITH YOUR LAPTOP MOBILE COMPUTER /COMMUNICATOR YOUR VIDEO CAMERA ON THE FRONT DOOR CAN TRANSMIT TEH IMAGE OF PERSON STANDING ON YOUR DOOR WHEN YOU ARE AWAY ON VACATION IN SOUTH AMERICA HOME COMPUTER/ COMM. SYSTEM AC WASHING MACHINE CAMERA YOUR COMPUTER WILL TALK TO ELECTRICITY AUTHORITIES TO DECIDE WHEN TO PUT ON THE WASHING MACHINES FROM CARPHONE YOUR WIFE CAN ORDE R OVEN TO START

GENERAL ARCHITECTURE OF OCB-283

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GENERAL ARCHITECTURE OF OCB-283

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