Ocb Arch. 5n5tk

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

GENERAL FUNCTIONAL BREAKDOWN OF ALCATEL 1000 E-10 (OCB-283) CCITT #7 SIGNALLING NETWORK

TELEPHONE NETWORK SUBSCRIBER ACCESS SYSTEM

CONNECTION AND CONTROL

DATA NETWORK VALUE ADDED NETWORK

DISK

PABX

MAGTAPE

OPERATION AND MAINTENANCE

O&M NETWORK

OCB-283 ARCHITECTURE OCB-283 COMPRISES OF FOLLOWING 3 SUBSYSTEMS CCITT #7 SIGNALLING

• SUBSCRIBER ACCESS SUBSYSTEM • CONTROL & CONNECTION SUBSYTEM • OPERATION & MAINTENANCE SUBSYTEM

NETWORK

TELEPHONE NETWORK

SUBSCRIBERCONNECTION DATA ACCESS AND NETWORK SYSTEM CONTROL VALUE ADDED NETWORK

DISK

PABX

OPERATION AND MAINTENANCE

MAGTAPE

O&M NETWORK

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 • 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 •2 •3.

SUBSCRIBER ACCESS SUBSYSTEM CONNECTION & CONTROL SUBSYSTEM 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

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

LET US NOW UNDERSATAND COMMON CHANNEL SIGNALLING BEFORE GOING FURTHER

OCB-283 FOLLOWS CCITT-NO 7 SIG.PROTOCOL FOR

COMMON CHANNEL SIGNALLING COMMON SIGNALLING CHANNEL

EXCHANGE B

EXCHANGE A

VOICE CHANNELS EXCHANGE C

SIGNALLING TIME SLOT LINK CARRIES ALL THE SIGNALLING FOR ALL THE VOICE CHANNELS BETWEEN TWO EXCHANGES

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

CSN 3

CSN 2

CSN 1

PS 2

PS 1

COC:- COMMON SIGNALLING CHANNEL

CIC:- VOICE CHANNELS

PS 3

RSU EXCH 1 PS=2000 SP1

PS 4

CSN 4

CSN 5

COC0 COC1 COC:- COMMON SIGNALLING CHANNEL

PS 5 PS 63

CSN 63

EXCH 2 PS=3000 SP2

NATIONAL

OCB-283 STP PS-2033

PS= SIGNALLING POINT NO STP=SIGNAL TRANSFER POINT CSNs ARE GIVEN LOCAL VERSION OF PS No. EXCHANGES & STP GET NATIONAL PSNo.

CCS SIGNALLING POINTS IN REFERENCE TO OCB-283’s SUBSCRIBER ACCESS UNITS: CSNS

functional architecture of

ocb-283

OCB-283 FUNCTIONAL DIAGRAM CSNL

LR (4MB /

CSND

S)

2 MB/S PCM

SMX

DT

BT

MCX LR

SMT

LR

COM

URM

PU PE

ETA

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 Signalling SMA ( PUPE ) Protocol Handler

•Switching Network These provides facililty 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 programmes & they process the calls on reception of dialled digits from calling subscriber/ circuit & take part in handling of call setup & release by processing .monitoring,measuring charging of call & all other commomn control function s needed for working of an Automatic Common Control Exchange. - These Contro units can comprise of following Functions FUNCTION NAME OF UNIT

NATURE OF JOB

MR :Multi TR : Translator MQ : Marker TX : GX : PC :

Callhandler SET UP & RELEASE OF CALL Translation of digit ,Databank of subs & cktsin files Message distribution between Common Control & Connection units Charger Computing the charge of a call,keeping meters Matrix System Handler Processes & makes connections in Switching matrix on the orders of MR or MQ Common Channel Signalling Manages the CCS7 network for signalling Network Controllere

• O& M Units & Maintenance Peripherals :- In an Electronic Stored ProgrammeControl Digital Exchange like OCB-283, all operation & maintenance activities are performed by a unit called O & M unit or OMC (Operation & Maintenance Centre) - This provides access for Man Machine dialogues for the human operators to interact and command the working of Exchnage Equipments.

SUBSCRIBER ACCESS SUBSYSTEM CSNL

LR (4MB /

CSND

S)

2 MB/S PCM

SMX

DT

BT

MCX LR

SMT

LR

COM

URM

PU PE

ETA

CKTS

SMA COMMUNICATION MULTIPLEX

TMN

OM

MQ

GX

MR

TX

TR

PC

OCB-283

SUBSCRIBER ACCESS SUBSYSTEM

• SUBSCRIBERS IN OCB-283 ARE CONNECTED ON “ DIGITAL SUBSCRIBER CENTRE” 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

CSNL

LR (4MB /

CSND

S)

2 MB/S PCM

SMX

DT

BT

MCX LR

SMT

LR

COM

URM

PU PE

ETA

CKTS

SMA COMMUNICATION MULTIPLEX

TMN

OM

MQ

GX

MR

TX

TR

PC

CONNECTION SUBSYSTEM • 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 IS THE HARDWARE STATION WHERE

• SMT 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 S FOLLOWING AUXILIARY EQUIPMENT FUNCTIONS :1. ETA

: : : :

PROVIDES TONES FREQUENCY SENDER & RECEIEVER CONFERENCE CIRCUITS EXCHANGE CLOCK IN FIRST TWO SMA

2. PUPE :HANDLES COMMON CHANNEL

SIGNALLING LINKS CARRYING CCS7 PROTOCOL ABOVE FUNCTIONS ARE CONNECTED TO SMX BY LR LINKS FOR SWITCHING

OCB-283 FUNCTIONAL DIAGRAM CSNL

LR (4MB /

CSND

S)

2 MB/S PCM

SMX

BT

MCX

CONTROL LR SMT COM URM SUBSYSTEM

CKTS

DT

LR PU PE

ETA

SMA

COMMUNICATION MULTIPLEX TMN

OM

MQ

GX

MR

TX

TR

PC

CONTROL SUBSYSTEM • CONTROL SUBSYSTEM S 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 S 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 SIGNALLING LINKS NETWORK CONTROLLER (MONITORING OF PUPE)

OCB-283 FUNCTIONAL DIAGRAM CSNL

LR (4MB /

CSND

S)

2 MB/S PCM

SMX

DT

BT

MCX LR

LR O&M SMT URM CKTS SUBSYSTEM

COM

PU PE

ETA

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

OCB-283 FUNCTIONAL DIAGRAM CSNL

LR (4MB /

CSND

S)

2 MB/S PCM

SMX

DT

BT

MCX

COMMUNICATION MULTIPLEX LR SMT COM

LR PU PE

ETA

URM

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

OCB-283 FUNCTIONAL DIAGRAM

TIME BASE

CSNL

LR (4MB /

CSND

S)

2 MB/S PCM

SMX

DT

BT

MCX LR

SMT

LR

COM

URM

PU PE

ETA

CKTS

SMA COMMUNICATION MULTIPLEX

TMN

OM

MQ

GX

MR

TX

TR

PC

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

OCB-283 FUNCTIONAL DIAGRAM CSNL

LR LINKS LR (4MB /

CSND

S)

2 MB/S PCM

SMX

DT

BT

MCX LR

SMT

LR

COM

URM

PU PE

ETA

CKTS

SMA COMMUNICATION MULTIPLEX

TMN

OM

MQ

GX

MR

TX

TR

PC

LR LINKS • 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 4.096 Mega Bits Per Second RATE • LR’s ARE ALSO CALLED MATRIX LINKS

IN

OCB-283

CALL PROCESSING FUNCTIONAL EQUIPMENTS INVOLVED IN CALL HANDLING MCX CSNL

CSND

UR M

SC

SC

VC

VC

CSNL

ETA SC COM

CKT S

PU/PE SC

MAS

TX

TR

MR

MQ

GX

PC

MIS

OM

SC: Signalling channel VC: Voice channel

CALL PROCESSING NEW CALL ORIGINATION • TS-16 OF LR 0 &LR 1 OF CSN ARE SIGNALLING CHANNELS SC BETN. CSN & THE EXCHANGE EQUIPMENT (PU/PE) ‘A’

CSNL

CSND

SC

MCX

VC

UR M

CSNL

VC ETA COM

CKT S

MAS TX

SC

‘B’

TR

MR

MQ

SC SC GX

PU/PE

PC

MIS

OM

SC: Signalling channel VC: Voice channel

CALL PROCESSING NEW CALL ORIGINATION • TS-16 OF LR 0 &LR 1 OF CSN ARE SIGNALLING CHANNELS SC BETN. CSN & THE EXCHANGE EQUIPMENT (PU/PE) • NEW CALL MESSAGE COMES ON SIG.CHANNEL SC

‘A’

CSNL

CSND

SC

MCX

VC

UR M

CSNL

VC ETA COM

CKT S

MAS TX

SC

‘B’

TR

MR

MQ

SC SC GX

PU/PE

PC

MIS

OM

SC: Signalling channel VC: Voice channel

CALL PROCESSING CALLING SUBS. COS IDENTIFICATION • NEW CALL MESSAGE IS SENT TO MR BY PUPE.

‘A’

CSNL

CSND

SC

MCX

VC

UR M

CSNL

VC ETA COM

CKT S

MAS TX

SC

‘B’

TR

MR

MQ

SC SC GX

PU/PE

PC

MIS

OM

SC: Signalling channel VC: Voice channel

CALL PROCESSING CALLING SUBS. COS IDENTIFICATION • NEW CALL MESSAGE IS SENT TO MR BY PUPE. • MR REQUESTS CALLING SUBSCRIBER DATA FROM TR MIS • TR PROVIDES CALLING SUB’S COS DATA TO MR

‘A’

CSNL

CSND

SC

MCX

VC

UR M

CSNL

‘B’

VC ETA COM

CKT S

MAS TX

SC

..OVER

TR

MR

MQ

SC SC GX

PU/PE

PC

MIS

OM

SC: Signalling channel VC: Voice channel

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 ‘A’

CSNL

CSND

SC

MCX

VC

UR M

CSNL

VC ETA COM

CKT S

MAS TX

SC

‘B’

TR

MR

MQ

SC SC GX

PU/PE

PC

MIS

OM

SC: Signalling channel VC: Voice channel

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’

CSNL

CSND

SC

MCX

VC

UR M

DT COM

CKT S

MAS TX

TR

MR

SC

MQ

SC SC GX

CSNL

‘B’

ETA PU/PE

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’

CSNL

CSND

SC

MCX

VC

UR M

COM

CKT S

MAS TX

SC

TR

MR

MQ

RGF SC SC GX

CSNL

‘B’

ETA PU/PE

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.) MAS • ETA SENDS IT TO MR ON • DIAL TONE IS CUT OFF ON ORDERS OF MR ‘A’

CSNL

CSND

SC

MCX

VC

UR M

COM

CKT S

MAS TX

SC

TR

MR

MQ

RGF SC SC GX

CSNL

‘B’

ETA PU/PE

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’

CSNL

CSND

SC

MCX

CSNL

VC

UR M

COM

CKT S

MAS TX

SC

‘B’

TR

MR

MQ

RGF SC SC GX

PU/PE

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’

CSNL

A

CSND

SC

MCX

CSNL

B

VC

UR M

COM

CKT S

MAS TX

SC

TR

MR

MQ

RGF SC SC GX

‘B’

PU/PE

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’

CSNL

CSND

SC

MCX

COM

CKT S

MAS TX

TR

MR

CSNL

VC-B

VC-A

UR M

SC

‘B’

MQ

RGF SC SC GX

PU/PE

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’

CSNL

CSND

SC

MCX

COM

CKT S

MAS TX

TR

MR

CSNL

VC-B

VC-A

UR M

SC

‘B

MQ

RGF SC SC GX

PU/PE

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’

CSNL

CSND

SC

MCX

COM

CKT S

MAS TX

TR

MR

CSNL

VC-B

VC-A

UR M

SC

‘B

MQ

RGF SC SC GX

PU/PE

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 PCM

CSND CSED

STS 1x3

MCX

2TO 16

SMT (1 TO 64)x2

2 TO 4

SMA 2 TO 64

CIRCUITS

LR

SMX (1 TO 8)x2

LR

MAS (1 TO 4) A&B SMC

SMC (2 TO 32)

MIS 1 A&B

VDU TTY

SMM

OPERATION &MAINTENANCE TERMINALS

LINK TO TMN

CONTROL TERMINAL

OCB-283 COMPONENTS • 1. SUBSCRIBER ACCESS UNIT CSN :- CALLED DIGITAL SUBSCRIBER CENTRE CSN – IT CAN BE LOCAL – OR DISTANT

-> CSNL ->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 FOLLOWING CONTROL FUNCTIONS MR,TR,TX,MQ,GX,& PC IN SOFTWARE FORM • 4. AUXILIARY UNITS:CALLED SMA THESE UNITS 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 CSNL • SMA:AUXILIARY EQPT CONTROL STATION PCM CSND • SMT :TRUNK CONTROL STATION • SMX:MATRIX CONTROL STATION CSED :MAINTENANCE • SMM STATION • STS :SYNCH. TIME BASE CIRCUITS COMM. • MIS :INTERSTATION MULTIPLEX COMM. • MAS:STATION ACCESS MULTIPLEX VDU

MCX

STS

SMX

SMT SMA

TTY OPERATION &MAINTENANCE TERMINALS LINK TO TMN

MAS SMC

SMC

SMC

MIS SMM CONTROL TERMINAL

HARDWARE STATIONS OF OCB-283 • CSN: SUBS. ACCESS UNIT CSNL CSND

MCX

PCM

CSED

STS

SMX

SMT SMA

CIRCUITS

MAS SMC

VDU TTY OPERATION &MAINTENANCE TERMINALS LINK TO TMN

SMC

SMC

MIS SMM CONTROL TERMINAL

HARDWARE STATIONS OF OCB-283 • CSN :SUBS.ACC UNIT • SMC:MAIN CONTROL STATION

CSNL CSND

MCX

PCM

CSED

STS

SMX

SMT SMA

CIRCUITS

MAS SMC

VDU TTY OPERATION &MAINTENANCE TERMINALS LINK TO TMN

SMC

SMC

MIS SMM CONTROL TERMINAL

HARDWARE STATIONS OF OCB-283 • CSN :SUBS.ACC UNIT • SMC:MAIN CONTROL STATION • SMA:AUXILIARY EQPT CONTROL STATION

CSNL CSND

MCX

PCM

CSED

STS

SMX

SMT SMA

CIRCUITS

MAS SMC

VDU TTY OPERATION &MAINTENANCE TERMINALS LINK TO TMN

SMC

SMC

MIS SMM CONTROL TERMINAL

HARDWARE STATIONS OF OCB-283 • CSN :SUBS.ACC UNIT • SMC:MAIN CONTROL STATION • SMA:AUXILIARY EQPT CONTROL STATION • SMT :TRUNK CONTROL STATION

CSNL CSND

MCX

PCM

CSED

STS

SMX

SMT SMA

CIRCUITS

MAS SMC

VDU TTY OPERATION &MAINTENANCE TERMINALS LINK TO TMN

SMC

SMC

MIS SMM CONTROL TERMINAL

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

CSNL CSND

MCX

PCM

CSED

STS

SMX

SMT SMA

CIRCUITS

VDU TTY OPERATION &MAINTENANCE TERMINALS LINK TO TMN

MAS SMC

SMC

SMC

MIS SMM CONTROL TERMINAL

HARDWARE STATIONS OF OCB-283 • CSN :SUBS.ACC UNIT • SMC:MAIN CONTROL CSNL STATION PCM CSND SMT • SMA:AUXILIARY EQPT CONTROL STATION CSED SMA • SMT :TRUNK CONTROL STATION CIRCUITS • SMX:MATRIX CONTROL STATION • SMM VDU TTY :MAINTENANCE STATION OPERATION &MAINTENANCE TERMINALS LINK TO TMN

MCX

STS

SMX

MAS SMC

SMC

SMC

MIS SMM CONTROL TERMINAL

HARDWARE STATIONS OF OCB-283 • CSN :SUBS.ACC UNIT • SMC:MAIN CONTROL CSNL STATION PCM CSND SMT • SMA:AUXILIARY EQPT CONTROL STATION CSED SMA • SMT :TRUNK CONTROL STATION CIRCUITS • SMX:MATRIX CONTROL STATION • SMM VDU :MAINTENANCE STATIONTTY OPERATION &MAINTENANCE TERMINALS • STS :SYNCH. TIME BASE

LINK TO TMN

MCX

STS

SMX

MAS SMC

SMC

SMC

MIS SMM CONTROL TERMINAL

HARDWARE STATIONS OF OCB-283 • CSN :SUBS.ACC UNIT • SMC:MAIN CONTROL STATION • SMA:AUXILIARY EQPT CONTROL CSNL PCM STATION CSND • SMT :TRUNK CONTROL STATION CSED • SMX:MATRIX CONTROL STATION :MAINTENANCE • SMM STATION CIRCUITS • STS :SYNCH. TIME BASE • MIS :INTERSTATION COMM. MULTIPLEX

MCX

STS

SMX

SMT SMA

VDU TTY OPERATION &MAINTENANCE TERMINALS LINK TO TMN

MAS SMC

SMC

SMC

MIS SMM CONTROL TERMINAL

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

MCX

STS

SMX

SMT SMA

TTY OPERATION &MAINTENANCE TERMINALS LINK TO TMN

MAS SMC

SMC

SMC

MIS SMM CONTROL TERMINAL

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

MCX

STS

SMX

SMT SMA

TTY OPERATION &MAINTENANCE TERMINALS LINK TO TMN

MAS SMC

SMC

SMC

MIS SMM CONTROL TERMINAL

STANDARD CONFIGURATIONS OF OCB-283 COMPACT (C) CONFIGURATION SMC SMA SMT SMX

: : : :

2 2 1 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 CSND

MCX

PCM

CSED

SMT

STS

SMX

SMA M IS

CIRCUITS

SMC VDU TTY

SMM

OPERATION &MAINTENANCE TERMINALS

CONTROL TERMINAL

LINK TO TMN

STANDARD CONFIGURATIONS OF OCB-283 SMALL ( P) CONFIGURATION SMC SMA SMT SMX

: : : :

2 +1 BACKUP 2 1 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 CSND

PCM

CSED

STS

MCX SMT

SMX

SMA

CIRCUITS

MAS SMC

VDU TTY OPERATION &MAINTENANCE TERMINALS LINK TO TMN

SMC

MIS SMM CONTROL TERMINAL

STANDARD CONFIGURATIONS OF OCB-283 MEDIUM (M) CONFIGURATION SMC SMA SMT SMX

: : : :

2 OR 3 MR+2=5 2 OR MORE 1 OR MORE 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 CSND

MCX

PCM

CSED

STS

SMX

SMT SMA

CIRCUITS

MAS SMC

SMC VDU TTY OPERATION &MAINTENANCE TERMINALS LINK TO TMN

MIS SMM CONTROL TERMINAL

STANDARD CONFIGURATIONS OF OCB-283 LARGE (G) CONFIGURATION SMC SMA SMT SMX

: 4 TO 7 MR+2 TX+2 SMC : 2 OR MORE : 1 OR MORE : 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 CSND

MCX

PCM

CSED

STS

SMX

SMT SMA

CIRCUITS

MAS SMC

VDU TTY OPERATION &MAINTENANCE TERMINALS LINK TO TMN

SMC MIS SMM CONTROL TERMINAL

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

LRE (X)

CALLING PARTY’S TIME SLOT X

LRS (X)

INCOMING LINKS Y LRE (Y) CALLED PARTY’S TIME SLOT

OUT GOING LINKS Y LRS (Y) CALLED PARTY’S TIME SLOT

•2. OCB-283 SWITCH PERFORMS SWITCHING IN TWO PARELLEL SWITCHING EQUIPMENTS SIMULTANEOUSLY FOR EVERY CALL

X-->Y SINGLE STAGE TIME SWITCH CONCEPT TS2047

X

TS 0

UNIDIRECTIONAL INCOMING LINK CARRYING 2048 TIME SLOTS OF 64 INTERNAL LINK EACH OF 32 TIME SLOTS

INLET Sequential Write

0 1

SPEECH BUFFER MEMORY

X SPEECH OF X

Controlled Read C O N T R O L U N I T

64x32-1 =2047

Y

TS2047

OUT LET

X

X

0 1

Controlled Write X

OUTGOING LINK CARRYING 2048 TIME SLOTS OF 64 INTERNAL LINK EACH OF 32 TIME SLOTS

Y

CONTROL MEMORY

Sequential Read Y

X

TS0

64x32-1 =2047

SMX-A 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

SAB B

LRS Y(B)

SWITCHING IN OCB-283 IN TWO BRANCHES OF SMX

MLCOM

SMX-B

TYPICAL OCB-283 EXCHANGE CSNL

PCMS

SMT

0

GLR( A & B) 3 4

1 0 1 2 3

0 S 1 M 2 X 1 SMX 1 B A

5 6 7 8 MAS 2 (A & B)

GLR (A & B)

SMA SMA SMA 1 2 3

MAS 1 (A & B)

SMC1

SMC2

SMC3

SMC4

SMC5

MIS A & B SMMA

OCB-283 OCB-283 DIAGRAM EXCHANGE

SMMB

TOKEN RINGS MIS MAS 1 & MAS 2

CSNL

0 1

SMT

0 1 2 3

GLR( A & B)

3 4

0 S 1 M 2 X 1 SMX 1 B A

5 6 7 8 MAS 2 (A & B)

GLR (A & B)

SMA SMA SMA 1 2 3

SPEECH PATH IN OCB-283 SMC1

SMC2

SMC3

SMC4

SMC5

MIS A & B SMMA

OCB-283 EXCHANGE

SMMB

TOKEN RINGS MIS MAS 1 & MAS 2

NETWORK LINK LR’s (GROUP OF LR’s)

SUBSCRIBER. ACCESS GLR 0B

CSNL

SMX

GLR 1B

1 GLR =8 LRs

GLR 0A

2 1 B B

1

SMT

1

AUXILIARY SMA EQPT

GLR OA

1 A

CH

GLR OB

SWITCHING MATRIX

A

CIRCUIT CONNECTION EQPT.

2 A

SW IT

3

2

PCM

B

8 A

0

G

LR A

3

2

PCM

8 B

CH

G LR 0 B

SMX

SW IT

GLR 1A

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 – NETWORK LINKS

LR’s

SMXs

SUBSCRIBER ACCESS IN OCB-283 CSNL & CSND CONFIGURATION CSNL 256 SUBS

CNE

CNL

256 SUBS

PCM 256 SUBS

CNL 256 SUBS.

CNE

CSN BASIC RACK

PCM

CSND

CSN BASIC RACK

OCB-283 SWITCH

PCM

LI N LR K SM S X TO

SUBSCRIBER ACCESS UNITS CSNL OR CSND RACKS BASIC RACK

T C R M T

TOND TOND

UCX0 UCX1

GTA

T C R M T

CNL OR ICNE

CNL OR ICNE

T C R M T

CNL OR ICNE

T C R M T

CNL OR ICNE

T C R M T

CNL OR ICNE

T C R M T T C R M T

CNL OR ICNE

T C R M T

CNL OR ICNE

CNL OR ICNE

T C R M T

CNL OR ICNE

EXTENSION RACKS

LI N LR K SM S X TO

SUBSCRIBER ACCESS UNITS CSNL OR CSND RACKS

T C R M T

TOND TOND UCX0 UCX1

T C R M T

TOND TOND

UCX0 UCX1

GTA

GTA

CNL OR ICNE CNL OR ICNE

T C R M T

CNL OR ICNE

T C R M T

CNL OR ICNE

T C R M T

CNL OR ICNE

CNL OR ICNE

T C R M T

CNL OR ICNE

CNL OR ICNE

T C R M T

CNL OR ICNE

T C R M T T C R M T T C R M T

T C R M T

CNL OR ICNE

T C R M T

CNL OR ICNE

T C R M T

CNL OR ICNE

T C R M T

CNL OR ICNE

T C R M T

CSN BASIC RACK

CSNL OR CSND SHELF NAMES POWER BASIC RACK SUPP INTERFACE T C R M T

TOND TOND

INTERFACE WITH EXCHANGE

TBALAM T C R M T

TBUCN

CNL OR ICNE

T C R M T

TBABM2

CNL OR ICNE

T C R M T

TBABM2

CNL OR ICNE

T C R M T

TBABM2

CNL OR ICNE

T C R M T

TBABM2

UCX0 UCX1

GTA

GLR TO

GLR TO

SMX B

SMX A

GLR0 &1(A) AUX. EQPT

GLR 0&1(B)

CONTROL LOGICS

T C R M T

TOND TOND

UCX0 UCX1

GTA

CNL OR ICNE

T C R M T

CNL OR ICNE

T C R M T

PCM CNE

T C R M T

CNL OR ICNE

T C R M T

CNL OR ICNE

T C R M T

CSN BASIC RACK FOR CSNL SUBS. CONNECTION SHELFS

1 GLR= 8 LRS TWO GLR/CSN

CSN HARDWARE CONFIGURATION DIGITAL CONTROL UNIT

UCN

CSND BASIC RACK T B A L A N T B U C N

IN CASE OF CSNL

TCILR

TOND 80 (0)

~ 40 V

T T R S 13 12 9 8 T T R S 15 14 11 10

T C C O B

TOND 80 (1)

~40 V

T C C S

T C C S

T P U C B

T M U C 2 M

T T MR Q C R X

T R C X

IN CASE OF CSNL

T R C X T S U C

T R C X

T R C X

T R C X

T M Q R

T M U C 2 M

T P U C B

T C C S

TCBTL

7 6

T T R S 1 T T R S 3

T C C S

T H L R

5

4

T H L R

T T R S 0 T T R S 2 T R F 8 B

*

UCX0

UCX1

T B T D

T B T D

B A T R F 8 B

*

T F I L M B *

GTA

T C R M T

T P O S

T C R M T

T M L A B

T S U R V 2

T S U R V 2

T S U R V 2 T 5 V 1 7

T 5 V 1 7

T S U R V 2

T C R M T

* PCB’S NOT USED IN CSNL

2 ~ 16 PCMS TOWARDS EXCHANGE CONTROL LOGICS

T C R M T

TOND TOND

UCX0 UCX1

GTA

CNL OR ICNE

T C R M T

CNL OR ICNE

T C R M T

PCM CNE

T C R M T

CNL OR ICNE

T C R M T

CNL OR ICNE

T C R M T

AUX. EQPT

CSN BASIC RACK FOR CSND SUBS. CONNECTION SHELFS

1 GLR= 8 LRS TWO GLR/CSN

CSN EXTENSION RACK LOCALSUBSS. CONCENTRATOR

CNL OR ICNE

REMOTE SUBS. CONN. CNE

CNL OR ICNE CNL OR ICNE REMOTESUBSS. CONCENTRATOR INTERFACE

PCM CNL OR ICNE

CNL OR ICNE

EXPANDED VIEW OF C N L SHELF

CNL OR ICNE

CNL OR ICNE CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

TT T T AA A A BB B B AA A A 01

TTT P HH OLL L RR

T A B A

TT T AA C BB R AA M 15T

DETAILS OF CN SHELF SUBSCRIBER CARDS 16 SUBS / CARD MAX. 16 CARDS

T TTT A AAA B BBB A AAA

CN

TT TT P H HA OL L B LR RA

TT AC BR AM T

:- 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 2048 x 2048 LR’S –IT HOLDS THE MLCOM SOFTWARE •SMX GETS 4.096 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 - 30 USED FOR VOICE LR0 LR0 LR255

.T.

1

LR255

2 3 4 COM

5 6 7

LR 2047

8

LR 2047

256x256 SQUARE MATRICES LRE 0

LRS 0

LRE 255

LRS 255

SMX 1 LR E 256

LRS 256

LRE 511

LRS 511

SMX 2 LRE 512

LRS 512

LRE 767

LRS 767

SMX 3 LRE 768

LRS 768

LRE 1023

LRS 1023

SMX 4

SWITCHING MATRIX BLOCK DIAGRAM

128~191 0~63 I/L

64x64 0~63 O/L

256x256 SQUARE MATRIX EXPANDE D VIEW 64 x64 BASIC SQUARE MATRIX

64~127 O/L

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 TS2047

X

TS 0

INLET W

0 1

SPEECH OF X

R C O N T R O L U N I T

X-Y

I/C LINK CARRYING 2048 TIME SLOTS OF 64 LRE LINK EACH OF 32 TIME SLOTS

TS2047

SPEECH BUFFER MEMORY

0 1

R Y

TS0

0 1

CONTROL MEMORY X

I/C LINK CARRYING 2048 TIME SLOTS OF 64 LRE LINK EACH OF 32 TIME SLOTS

TS 0

SPEECH OF Y

X

TS2047

W

Y

INLET W

64x32-1 =2047

OUT LET

R

SWITCHING FROM Y-X

y 64x32-1 =2047

C O N T R O L U N I T

SPEECH BUFFER MEMORY Y

64x32-1 =2047

OUT LET

TS2047

W

X

TS0

0 1

CONTROL MEMORY R

Y

X 64x32-1 =2047

SWITCH OF Y

SWITCH OF X

BASIC 64x64 SQUARE MATRIX CORRESPONDING TO LRE OF X

BASIC 64x64 SQUARE MATRIX CORRESPONDING TO LRE OF Y

WITCHING 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 S AUXILIARY EQUIPMENT FUNCTIONS -(DOING FOLLOWING JOBS) 1. ETA

:PROVIDES TONES : FREQUENCY SENDER & RECEIEVER : FIRST TWO SMA KEEP EXCHANGE CLOCK

2. PUPE :HANDLES COMMON CHANNEL SIGNALLING 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 SIGNALLING 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) SMT(B)

PCM TER MIN ATIO ON

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

SMX RACK PCM

SMT RACK

SMT SMT

PCM

DDF

CONTROL STATIONS OF OCB-283

PCMS

CSNL

0 1

SMT

0 1 2 3

SMC1

GLR( A & B) 3 4

0 S 1 M

GLR (A & B)

MAIN MULTI PROCESSOR CONTROL STATIONS :SMC SMC2

SMC3

SMC4

SMC5

MIS A & B

SMMA

OCB-283 OCB-283 DIAGRAM EXCHANGE

SMMB

TOKEN RINGS MIS MAS 1 & MAS 2

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

PCMS

CSNL

0 1

SMT

0 1 2 3

SMC1

GLR( A & B) 3 4

0 S 1 M 2 X 1 SMX 1 B A

5 6 7 8 MAS 2 (A & B)

SMC2

GLR (A & B)

SMA SMA SMA 1 2 3

MAINTENANCE MAS 1 STATIONS SMM A&B 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

MAINTENANCE STAIONS SMM(A) & SMM(B)

• 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

MAINTENANCE STAIONS SMM(A) & SMM(B) • 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

SMMB

PERIPH

DISK 2

COMMUNICATION MULTIPLEXES CSNL

0 1

SMT

0 1 2 3

PCMS

GLR( A & B)

3 4

0 S 1 M 2 X 5 1 6 SMX 1 B A 7 8 MAS 2 (A & B)

MAS

GLR (A & B)

SMA SMA SMA 1 2 3

MAS 1 (A & B)

SMC1

SMC2

SMC3

SMC4

SMC5

MIS A & B

MIS

SMMA

OCB-283 DIAGRAM

SMMB

TOKEN RINGS MIS MAS 1 & MAS 2

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 SIGNALLING CHANNELS CALLED COC:-COC0= (TS16-LR0 ) & COC1=(TS16-LR1)

PCWAM • PCWAM : PERSONAL •

•

•

COMPUTER WORK ACCESS METHOD 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 • 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

MIS 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

MAINTENANCE COMMANDS HARDWARE EQUIPMENT’S STATUS INTERROGATION @ TELIN: @ AFUR=1<63; GLR A&B

@ ESMIN: CSNL @ AM=SMT; OR SMT @ AM=SMTx; OR @ AM=SMTAx; OR AM=SMTBx; @ ESMIN: @ AM=SMC; OR @ AM=SMCx; OR @; OR

@ ESMIN: @ AM=SMX; OR AM=SMXn; OR AM=SMXAn; OR AM=SMXBn;

GLR A&B

0 1

3 4

0 1 2 3

5 6 7 8

0 1 2

SMX 1 A

S M X 1 B

SMA 1

SMA 2

SMA 3

MAS 2 (A & B) MAS 1 (A & B)

SMC1

@ AM=SMM; OR SMMA; OR SMMB;

@ ESMIN: @AM=SMA; OR AM=SMAx;

SMC2

SMC3

SMC4

MIS A & B SMMA

OCB-283 DIAGRAM

SMMB

@ AMXIL: @ AMX=MIS; OR AMX=MAS; OR AMX= MISA OR AMX=MISB SMC5 OR AMX=MASAn; OR AMX=MASBn; TOKEN RINGS MIS MAS 1 & MAS 2

SSING OF GLR ‘s WITH RESPECT TO CONNECTION UNITS & WRT T IN OCB-283 SOFTWARE AFGRU=UR-GLR

CSNn AFUR=n

AFGRU=n-0

AFGRX=1-2

AFGRU=n-1

AFGRX=1-3 AFGRX=1-15 AFGRX=1-29

AFGRA=SMA-GLR

SMAn

AFGRX=SMX-GLR

AFGRA=n-0

AM=SMAn

AFGRX=2-8 AFGRX=2-11

0 1 2 3

SMX1 ( A &B) 31

SMX2 ( A &B)

AFGRX=3-3

AFGRT= SMT-GLR

SMX3 ( A &B)

AFGRT=n-0

PCM

AFGRT=n-1

SMTn

AFGRT=n-2

AM=SMTn AFGRT=n-3

SMX8 ( A &B)

CONNECTION OF LR’s IN THE FORM OF GROUP OF LR’s-> GLR TO SWITCHING MATRIX STATION SMX

OCB-283 SWITCHING SUBSYSTEM

PROTECTION OF CONNECTIONS IN SPEECH PA 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 COMPARISON OF BRANCHES MEANS:- PARITY TYPE :- PERMANENT

TRANSMISSION CHEC

IN EACH BRANC SEPARATELY

SIMPLE SOPHISTICAT PARITY CRC PERMANENT ON REQUEST

SWITCHING IN OCB-283 DEFINITION OF ADDITIONAL BITS IN SAB FUNCT ADDITIONAL BITS

8 SPEECH BITS

S A B

TSi 3.9 mics

LAE LAS CONNECTION UNIT 0

8 SP

8 ADD

SMX

TSi

3.9 mics

LRE A&B LRS A&B 1

2

3

4

5

6

8 SPEECH BITS

MODES OF OPERATION

7

8 9 10 11 12 13 14 15 ADDITIONAL 8 BITS

PERMANENT MODE MULTIFRAME MODE BIT 13 =0 BIT 13=1 (SYNC WORD) BIT 14=0 (HOMOLOGOUS RESULT BIT 14=CONTROL BI 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

2000mm

DBM

CB

CC

SMC

SMC

SMC

STS

SMC

SMC

SMX1

SMT-A

SMC

SMC

SMX2

SMT-B

AL ANN PER

SMA

SMC

SMX E

SMT-A

SMMB

SMA

SMC

SMX E

SMT-B

Only SMX’s

1 SMC+ 2 SMT’s

SMMA

1 SMC +STS+SMMA/B

MTU

3 SMC + 2 SMA

5 SMCs

XA

UA SMC

UB

UC

UD

CSN-BASIC

CSN-EXTN.

SMC

SMC

SMC

UCN

SMT-A

SMA

SMT-A

CNL0

CNL 4

SMT-B

SMA

SMT-B

CNL1

CNL6

SMA

SMA

SMT-A

CNL2

CNL7

SMA

SMA

SMT-B

CNL3

CNL8

1SMC+ 2 SMT’s

UCN+ 4 CNL(ICNE)

5 CNL(ICNE)

1 SMC+1 SMT +2 SMA

1SMC+ 4 SMA

CNL5

LAY OUT OF AN OCB-283 SWITCH ROOM

EXAMPLE :-BOMBAY SION TELEPHONE EXCHANGE SWITCH ROOM

ALL DIMENSIONS IN MM

1500 TR07

UE1

CSN 021

CSN 020

800 690

TR06

DBM

CA

UC1

SDE1

CB1

XA1A

XA2A

CSN 011

CSN 010

UD1

UC2

XA1B

XA2B

CSN 050

CSN 041

5

4

950 TR05

CSN 061

TR04

16

15

14

13

12

11

10

9

VDU OPERATION ROOM

8

CSN 060

7

VDU

CSN 051

6

VDU

CSN 040

3

VDU

CSN 031

2

CSN 030

1

I R P ACDB

CONNECTION UNITS’ UR DESIGNATION NUMBERING IN OCB-283 TYPE OF CONN.UNIT

CSN MLCSN SMT MLURM

S/W MACHINE

RANGE OF UR NO.S

1TO 63 1 UR PER CSN 223 TO 64

STARTING FROM HIGHEST 8 MODULE OR UR NO PER SMT UR NO FOR FIRST MODULE FOR SMT 1G & OF FIRST SMT 32 MOD. OR UR PER SMT-2G

SMA MLETA/ MLPUPE

256 TO 224 1 UR NO PER SMA

UR NUMBERING SCALE 1234

63 64

CSN 1~63

UR # 223 224

SMT20

SMT 1

256

SMA32

SMA1

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 16 2 SMT 1G 32 4 SMT 2G 128 16 SMA 8 1 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

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

DIMENSIONING OF OCB-283

• CALCULATING SMA MODULARITY OF SMA

MINIMUM 2 SMA -> SMA 1 & SMA 2 NO OF SMA NEEDED DEPENDS UPON

( ALWAYS NEEDED)

• 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 2 ACHIL CARD GIVING 1 PUPE ONE PUPE IS KEPT SPARE AS STANDBYE

DIMENSIONING OF OCB-283

• CALCULATION OF SMCs •

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 ING THE S/W LOGICAL MACHINES ‘ML’ OF COMMON CONTROL FUNCTIONS OF EXCHANGE :-

ML -> • •

TX MQ

GX

&

PC

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 ;

– •

TR

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 )

– •

MR

MLTR & MLTX

THE SIZE OF MLTX ALSO DEPENDS UPON TOTAL ERLANGE TRAFFIC TO BE HANDLED BECAUSE IT PROVIDES THE CHARGING S WHICH HANDLE THE CALLS DURING THE CONVERSATION PHASE OF CALLS (1 /CALL) – EACH MLTX HOLDS MACROPROGRAMME MEMORIES IN BLOCKS ; BLOCKS CAN BE MINIMUM 1 TO MAX. 4 – EACH BLOCK GIVES 2000 (OR 3000) CHARGING S

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 1016 SIMULTANEOUS CALLS INDEPENDENTLY & ITS MEMEORIES ARE NOT DUPLICATED AN MLMR CAN HAVE 1 TO 4 BLOCKS OF MACRO-PROGRAMME MEMORIES ; EACH BLOCK HOLDS 256 CALL HANDLING S , HENCE MAXIMUM S PER MLMR =1024 ; 2 S PER BLOCK OF MACRO-PROGRAMME DO NOT HANDLE CALLS HENCE NET AVAILABLE REG./BLOCK=254 MAXIMUM S / MLMR=1016 AVAILABLE FOR HANDLING CALLS DEPENDING UPON THE TOTAL EXCHANGE’S PROJECTED TRAFFIC & BHCA ( CALLING RATE OF ALL SUBS./CKTS) ; THE TOTAL NUMBER OF S REQUIRED IS ESTIMATED. DEPENDING UPON NO. OF S 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; WITH ->MLMQ,MLTR,MLTX,MLGX,MLPC – 2 SMC’s – 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 S THE EMPIRICAL FIGURES OF HANDLING & PROCESSING TIME etc. CAN BE TAKEN FROM THOSE CORRESPONDING TO MR & TX S 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 OR FUNCTIONS IN SMC

TRFC. HANDLING CAP. CALL ATT./SECOND/SMC

1.MR,MQ,TR,TX,GX,PC 18 CA/S 2.MQ,GX,TR,TX,PC 50 CA/S 3.MQ,GX,PC 110 CA/S 2 4.TR 110 CA/S 2 2 5.TX 110 CA/S 2 2 6.MR 36 CA/S 2 -

2 2

-

MIN. NO & MAX. NO OF SUCH SMCS

2 2

2

7

Standard Configurations of OCB-283 Exchanges CONFIGURATION OF COMBINATION OF EXCHANGE. MLS IN SMC

COMPACT C SMALL P MEDIUM M LARGE G

NO OF SMC’S OF THIS TYPE

TRAFFIC HANDL-ING CAP. OF EXCH.

MR,TR,TX,MQ,GX,PC

2 ONLY

MR,TR,TX,MQ,GX,PC

2 + 1 RES

36 CA/S OR 130000 CA/H

TR,TX,MQ,GX,PC

2

100 CA/SOR 360000 CA/H

MR

2 ~3 +1 RES

TR,MQ,GX,PC

2

MR TX

4 TO 7 2

5 CA/S OR 18000 CA/H

220 CA/S OR 800000 CA/H +1 RES

POWER DISTRIBUTION & CONSUMPTION IN OCB-283 EXCHANGE GETS POWER FROM -48 V TRIPPLED DC POWER SUPPLY ON CABLES PROVIDED UPTO RACK INSTALLED IN ONE OF TH E ROW

FUSES

EX EA CA RT HN H G

FROM SDE THE DC SUPPLY IS DISTRIBUTED FROM RESPECTIVE FUSES TO CONCERNED RACKS : TOTAL CURRENT CONSUMTION OF A TYPICAL OCB283 EXCHANGE OF 20 K LINES IS APPROXIMATELY = 140 A CURRENT REQUIREMENT OF VARIOUS STATIONS IS -48V GIVEN BELOW CURRENT CONSUMTION INCREASES WITH INCREASE IN SUBSCRIBER & TRAFFIC STATION CURRENT AT 5 V AT 48V 0V SMC 32 A 4A SMA 24 A 3A SMX SMT1G 34 A 4.5 A SMT2G SMM CSN B CSN E

E

SDE

SDE RACK

HART OF INSTALLATION ACTIVITIES OF A MEDIUM SIZE OCB-283 EXCHN IN DAYS 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 4 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 ACTIVITY DAYS MARKING TILE CUTTING BASE PLATE FIXING RACK FIXING AND ALIGNMENT FIXING DCDB, ACDB, IRP, ALARM BOX LAYING DCDB TO SDE POWER CABLE LAYING O/P CABLE TO DCDB POWER CABLE LAYING SDE TO RACK ENERGY CABLES INTER RACKS AND INTER CSNL CABLING SMM TO IRP CABLES ACDB TO PERIPHERALS POWER CABLES IRP TO PERIPHERALS SIGNAL CABLES PCM CABLE LAYING AND LACING

PCM CABLE PREPARATION (BOTH SIDES) PCM CABLE TERMINATION (BOTH SIDES) BUZZING PCM CABLE ALARM CABLE LAYING AND TERMINATION SUBS CABLE LAYING AND LACING SUBS CABLE PREPARATION (BOTH SIDES) SUBS CABLE TERMINATION (BOTH SIDES) SUBS CABLE BUZZING AND FAULT CLEARING A-B WIRE CHECK AND FAULT CLEARANCE LOCAVAR ALARM TESTING SMM TEST JUNCTION DATA VERIFICATION AND TEST SUBSCRIBER DATA TEST JUNCTION THROUGH TESTS FSQ TEST

ISDN : THE CONCEPT OF MODERN COMMUNICATION

YOR FUTURISTIC HOME IN INDIAN VILLAGE INTERACTIVE SATTELLITE & CABLE TV SERVICES WILL BE CONTROLLED BY HOME COMPUTER OVEN TV

YOU CAN ORDER YOUR CURTAINS TO BE OPENED OR CLOSED DEPENDING UPON WHEATHER YOU CAN ORDER YOUR AC TO ON/OFF

HOME COMPUTER/ COMM. SYSTEM AC

WASHING MACHINE

ISDN :

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

CAMERA

YOUR COMPUTER FROM CARPHONE YOUR WIFE WILL TALK TO ELECTRICITY AUTHORITIES CAN ORDE R OVEN TO START TO DECIDE WHEN TO PUT ON THE WASHING MACHINES

CONCEPT O FUTUREISTIC HOME & COMMUNICATION

YOR ARE HERE IN SOUTH AMERICA ON VACATIONS AT BEACH WITH YOUR LAPTOP MOBILE COMPUTER /COMMUNICATOR