general architecture of ocb-283 subsystems & functions of ocb-283
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GENERAL ARCHITECTURE OF OCB-283
SUBSYSTEMS & FUNCTIONS OF OCB-283
GENERAL FUNCTIONAL BREAKDOWN OF ALCATEL 1000 E-10 (OCB-283)
SUBSCRIBER ACCESSSYSTEM
CONNECTIONAND
CONTROL
OPERATIONAND
MAINTENANCE
CCITT #7SIGNALING NETWORK
TELEPHONE NETWORK
DATANETWORK
VALUEADDED NETWORK
O&MNETWORK
DISK
MAGTAPEPABX
OCB-283 ARCHITECTUREOCB-283 COMPRISES OF FOLLOWING 3
SUBSYSTEMS
SUBSCRIBER ACCESSSYSTEM
CONNECTIONAND
CONTROL
OPERATIONAND
MAINTENANCE
CCITT #7SIGNALING
NETWORK
TELEPHONE NETWORK
DATANETWORK
VALUEADDED NETWORK
O&MNETWORK
DISK
MAGTAPEPABX
• SUBSCRIBER ACCESS SUBSYSTEM
• CONTROL & CONNECTION SUBSYTEM
• OPERATION & MAINTENANCE SUBSYTEM
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 .
• 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
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 .
3. OPERATION & MAINTENANACE SUBSYTEM :-
FOR O&M OF EXCHANGE BY OPERATORS
INTRODUCTION OF OCB-283
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
EXCHANGEA
EXCHANGEEXCHANGECC
EXCHANGEEXCHANGEBB
COMMON SIGNALING CHANNELCOMMON SIGNALING CHANNEL
VOICE CHANNELSVOICE CHANNELS
OCB-283 FOLLOWS CCITT-NO 7 SIG.PROTOCOL FOR OCB-283 FOLLOWS CCITT-NO 7 SIG.PROTOCOL FOR
COMMON CHANNEL SIGNALINGCOMMON CHANNEL SIGNALING
SIGNALING TIME SLOT LINK CARRIES ALL THE SIGNALING SIGNALING TIME SLOT LINK CARRIES ALL THE SIGNALING FOR ALL THE VOICE CHANNELS BETWEEN TWO EXCHANGESFOR 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 USECOMMON CHANNEL SIGNALING CCS#7
CCS SIGNALING POINTS IN REFERENCE TO OCB-283’s SUBSCRIBER ACCESS UNITS: CSNS
PS 1PS 2
PS 3
PS 5
PS 63
CSN 1CSN 2
CSN 3
PS 4
CSN 5
CSN 63
EXCH. COMMON PS=255 (LOCAL)
OCB-283
CSN 4
RSU
COC:- COMMON SIGNALING CHANNEL
COC
PS 1PS 2
PS 3
PS 5
PS 63
CSN 1CSN 2
CSN 3
PS 4
CSN 5
CSN 63
STPPS-2033
EXCH 1 PS=2000 SP1
EXCH 2 PS=3000 SP2
CCS SIGNALING POINTS FOR OCB-283 IN NATIONAL NETWORK
COC1
COC0
OCB-283NATIONALNATIONAL
CSN 4
RSU
PS= SIGNALING POINT NOSTP=SIGNAL TRANSFER POINT
CSNs ARE GIVEN LOCAL VERSION OF PS No.EXCHANGES & STP GET NATIONAL PSNo.
COC:- COMMON SIGNALING CHANNEL
CIC:- VOICE CHANNELS
COC:- COMMON SIGNALING CHANNELLOCAL
functional
architecture of OCB-283
OM MQ GX MR TX TR PC
COMETA
PUPE
SMTURM
MCX
CSNL
CKTS
LR (4MB / S) DT
LR
LR
COMMUNICATION MULTIPLEXTMN
2 MB/SPCM
CSNDBT
OCB-283 FUNCTIONALDIAGRAM
SMA
SMX
OCB-283 SWITCHING SYSTEMOCB-283 SWITCHING SYSTEMAny 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 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 channelson a LR link (internal PCM)
- These units areNAME 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 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 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 CALLTR : Translator Translation of digit ,Data-bank of subs & ckts in filesMQ : Marker Message distribution between Common Control
& Connection units TX : Charger Computing the charge of a call, keeping metersGX : Matrix System Handler Processes & makes connections in Switching
matrix on the orders of MR or MQPC : Common Channel Signaling Manages the CCS#7 network for signaling
Network Controller
• O& M Units & Maintenance Peripherals :-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 unitor OMC (Operation & Maintenance Center)
- This provides access for Man Machine dialogues for the human operators to interact and command the working of Exchange Equipments.
OM MQ GX MR TX TR PC
COMETA
PUPE
SMTURM
MCX
CSNL
CKTS
LR (4MB / S) DT
LR
LR
COMMUNICATION MULTIPLEXTMN
2 MB/SPCM
CSNDBT
SMA
SMX
SUBSCRIBER ACCESS SUBSYSTEM
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
OCB-283
OM MQ GX MR TX TR PC
COMETA
PUPE
SMTURM
MCX
CSNL
CKTS
LR (4MB / S) DT
LR
LR
COMMUNICATION MULTIPLEXTMN
2 MB/SPCM
CSNDBT
SMA
SMX
CONNECTIONSUBSYSTEM
•CONNECTION SUBSYSTEM COMPRISES OFSWITCHING MATRIX STATION
SMXTRUNK MULTIPLEX STATION SMTAUXILIARY EQUIPT. STATION SMA
& ALL ASSOCIATED LR LINKS
CONNECTION SUBSYSTEM
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 LRLR 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 SMA IS THE HARDWARE STATION WHICH SUPPORTS FOLLOWING AUXILIARY SUPPORTS FOLLOWING AUXILIARY EQUIPMENT FUNCTIONS :-EQUIPMENT FUNCTIONS :-
1. 1. ETAETA : PROVIDES TONES : PROVIDES TONES : FREQUENCY SENDER & RECEIEVER: FREQUENCY SENDER & RECEIEVER : CONFERENCE CIRCUITS: CONFERENCE CIRCUITS : EXCHANGE CLOCK IN FIRST TWO SMA : EXCHANGE CLOCK IN FIRST TWO SMA
2. 2. PUPE PUPE ::HANDLES HANDLES COMMON CHANNELCOMMON CHANNEL SIGNALING LINKS SIGNALING LINKS CARRYING CARRYING CCS7 PROTOCOL CCS7 PROTOCOL
ABOVE FUNCTIONS ARE CONNECTED TO SMX ABOVE FUNCTIONS ARE CONNECTED TO SMX BY LR LINKS FOR SWITCHINGBY LR LINKS FOR SWITCHING
COMMUNICATION MULTIPLEX
OM MQ GX MR TX TR PC
COMETA
PUPE
SMTURM
MCX
CSNL
CKTS
LR (4MB / S) DT
LR
LR
TMN
2 MB/SPCM
CSNDBT
OCB-283 FUNCTIONALDIAGRAM
SMA
SMX
CONTROLSUBSYSTEM
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)
- MQMESSAGE DISTRIBUTOR (MARKING)
- GXMATRIX SYSTEM HANDLER (SWITCHING)
- PC CCS 7 SIGNALING LINKS NETWORK CONTROLLER (MONITORING OF PUPE)
OM MQ GX MR TX TR PC
COMETA
PUPE
SMTURM
MCX
CSNL
CKTS
LR (4MB / S) DT
LR
LR
COMMUNICATION MULTIPLEXTMN
2 MB/SPCM
CSNDBT
OCB-283 FUNCTIONALDIAGRAM
SMA
SMX
O & M SUBSYSTEM
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
OM MQ GX MR TX TR PC
COMETA
PUPE
SMTURM
MCX
CSNL
CKTS
LR (4MB / S) DT
LR
LR
COMMUNICATION MULTIPLEXTMN
2 MB/SPCM
CSNDBT
OCB-283 FUNCTIONALDIAGRAM
SMA
SMX
COMMUNICATIONMULTIPLEX
COMMUNICATION COMMUNICATION MULTIPLEXMULTIPLEX
• 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 – MISMIS– MAS MAS
OM MQ GX MR TX TR PC
COMETA
PUPE
SMTURM
MCX
CSNL
CKTS
LR (4MB / S) DT
LR
LR
COMMUNICATION MULTIPLEXTMN
2 MB/SPCM
CSNDBT
OCB-283 FUNCTIONALDIAGRAM
SMA
SMX
TIME BASE
SYNCHRONISATION & TIME BASE
• TIME BASE IS USED TO SYNCHRONISE THE LR LINKS
• TIMEBASE IS GENERATED IN OCB BYSTS EQUIPMENT
• STS COMPRISE OF THREE OSCILLATOR CARDS PROVIDING TRIPLICATE TIME BASE
• STS EQUIPMENT IS MOUNTED IN SMM RACK
OM MQ GX MR TX TR PC
COMETA
PUPE
SMTURM
MCX
CSNL
CKTS
LR (4MB / S) DT
LR
LR
COMMUNICATION MULTIPLEXTMN
2 MB/SPCM
CSNDBT
OCB-283 FUNCTIONALDIAGRAM
SMA
SMXLR LINKS
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
CKTS
FUNCTIONAL EQUIPMENTS INVOLVED IN CALL HANDLING
CALL PROCESSING
OM
TR MR MQ GX PC
ETA
TX
MAS
MIS
SC SC
SC
MCX
COM
CSNL
CSND
CSNL
VC VC
SC
URM
PU/PE
SC: Signalling channelVC: Voice channel
• TS-16 OF LR 0 &LR 1 OF CSN ARE SIGNALING CHANNELS SC SC BETN. CSN & THE EXCHANGE EQUIPMENT (PU/PE)
CALL PROCESSINGNEW CALL ORIGINATION
CKTS
OM
TR MR MQ GX PCTX
MAS
MIS
SC SC
SC
MCX
COM
CSNL
CSND
CSNL
VC VC
SC
URM
ETA
SC: Signalling channelVC: Voice channel
‘A’ ‘B’
PU/PE
• TS-16 OF LR 0 &LR 1 OF CSN ARE SIGNALING CHANNELS SC SC BETN. CSN & THE EXCHANGE EQUIPMENT (PU/PE)
• NEW CALL MESSAGE COMES ON SIG.CHANNEL SC
CALL PROCESSINGNEW CALL ORIGINATION
CKTS
OM
TR MR MQ GX PCTX
MAS
MIS
SC SC
SC
MCX
COM
CSNL
CSND
CSNL
VC VC
SC
URM
ETA
SC: Signalling channelVC: Voice channel
‘A’ ‘B’
PU/PE
• NEW CALL MESSAGE IS SENT TO MR BY PUPE.
CALL PROCESSINGCALLING SUBS. COS IDENTIFICATION
CKTS
OM
TR MR MQ GX PCTX
MAS
MIS
SC SC
SC
MCX
COM
CSNL
CSND
CSNL
VC VC
SC
URM
ETA
SC: Signalling channelVC: Voice channel
‘A’ ‘B’
PU/PE
• 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
CALL PROCESSINGCALLING SUBS. COS IDENTIFICATION
CKTS
OM
TR MR MQ GX PCTX
MAS
MIS
SC SC
SC
MCX
COM
CSNL
CSND
CSNL
VC VC
SC
URM
ETA
SC: Signalling channelVC: Voice channel
‘A’ ‘B’
PU/PE
• MR REQUESTS MQ TO PROVIDE ADDRESS OF VC ON MCX (LR-LRX CORRESPONDENCE)
• MQ PROVIDES MCX SIDE ADDRESS TO MR
CALL PROCESSINGMCX SIDE ADDRESS OF VC
CKTS
OM
TR MR MQ GX PCTX
MAS
MIS
SC SC
SC
MCX
COM
CSNL
CSND
CSNL
VC VC
SC
URM
ETA
SC: Signalling channelVC: Voice channel
‘A’ ‘B’
PU/PE
CALL PROCESSING
• 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)
DIAL TONE PROVISION TO CALLING SUBS.
CKTS
OM
TR MR MQ GX PC
ETA
TX
MAS
MIS
SC SC
SC
MCX
COM
CSNL
CSND
CSNL
VC DT
SC
URM
SC: Signalling channelVC: Voice channel
‘A’ ‘B’
PU/PE
CALL PROCESSING
• FIRST DIGIT IS RECEIVED VIA VOICE CHANNEL VC IN RGF OF ETA (FOR DTMF SUBS.)
RECEPTION OF FIRST DIGIT
CKTS
OM
TR MR MQ GX PC
ETA
TX
MAS
MIS
SC SC
SC
MCX
COM
CSNL
CSND
CSNL
VC
RGF
SC
URM
SC: Signalling channelVC: Voice channel
‘A’ ‘B’
PU/PE
CALL PROCESSING
• 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
RECEPTION OF FIRST DIGIT
CKTS
OM
TR MR MQ GX PC
ETA
TX
MAS
MIS
SC SC
SC
MCX
COM
CSNL
CSND
CSNL
VC
RGF
SC
URM
SC: Signalling channelVC: Voice channel
‘A’ ‘B’
PU/PE
CALL PROCESSING
• FIRST FEW DIGITS ARE PRE-ANALYSED ON REQUEST OF MR BY TR
• REMAINING DIGITS MAY BE STILL BEING RECEIVED
DIGIT ANALYSIS
CKTS
OM
TR MR MQ GX PCTX
MAS
MIS
SC SC
SC
MCX
COM
CSNL
CSND
CSNL
VC
RGF
SC
URM
SC: Signalling channelVC: Voice channel
‘A’ ‘B’
PU/PE
CALL PROCESSING• 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’
SELECTION
‘A’ ‘B’
CKTS
OM
TR MR MQ GX PC
A B
TX
MAS
MIS
SC SC
SC
MCX
COM
CSNL
CSND
CSNL
VC
RGF
SC
URM
SC: Signalling channelVC: Voice channel
PU/PE
CALL PROCESSING• 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
CALLED PARTY ANSWERS
‘A’ ‘B’
CKTS
OM
TR MR MQ GX PCTX
MAS
MIS
SC SC
SC
MCX
COM
CSNL
CSND
CSNL
VC-A
RGF
SC
URM
SC: Signalling channelVC: Voice channel
PU/PE
VC-B
‘A’ ‘B
CKTS
OM
TR MR MQ GX PCTX
MAS
MIS
SC SC
SC
MCX
COM
CSNL
CSND
CSNL
VC-A
RGF
SC
URM
SC: Signalling channelVC: Voice channel
PU/PE
CALL PROCESSING
• TWO UNIDIRECTIONAL CONNECTIONS ARE ESTABLISHED IN MCX ON ORDER OF MR VIA GX BETWEEN VC-A & VC-B
• ‘A’ & ‘ B ‘ CAN NOW CONVERSE
BOTHWAY CONNECTION
VC-B
‘A’ ‘B
CKTS
OM
TR MR MQ GX PCTX
MAS
MIS
SC SC
SC
MCX
COM
CSNL
CSND
CSNL
VC-A
RGF
SC
URM
SC: Signalling channelVC: Voice channel
PU/PE
CALL PROCESSING
• 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
CHARGING (METERING)
VC-B
OCB-283EXCH
AND YOUR METER
IS RUNNINGHERE!!!
HARDWARE ARCHITECTURE OF
OCB-283
HARDWARE ARCHITECTURE OF OCB-283
LINK TO TMN
SMA2 TO 64
STS1x3
SMC
SMM
MCX
SMX(1 TO 8)x2
MAS (1 TO 4) A&B
MIS 1 A&B
SMC(2 TO 32)
SMT(1 TO 64)x2
OPERATION &MAINTENANCE TERMINALS CONTROL
TERMINAL
CIRCUITS
VDUTTY
16 LR’S
LR
LR
PCM
CSNL
CSND
CSED
2TO 16
2 TO 4
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
• 3. COMMON CONTROL UNITS: CALLED MAIN MULTIPROCESSOR
CONTROL STATION SMC , CONTROL UNITS SUPPORT FOLLOWING CONTROL FUNCTIONSMR,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
OCB-283 COMPONENTS
LINK TO TMN
SMA
STS
SMC
SMM
MCX
SMX
MAS
MIS
SMT
OPERATION &MAINTENANCE TERMINALS CONTROL
TERMINAL
CIRCUITS
VDUTTY
PCM
CSNL
CSND
CSED
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
SMCSMC
LINK TO TMN
SMA
STS
SMC
SMM
MCX
SMX
MAS
MIS
SMT
OPERATION &MAINTENANCE TERMINALS CONTROL
TERMINAL
CIRCUITS
VDUTTY
PCM
CSNL
CSND
CSED
HARDWARE STATIONS OF OCB-283
• CSN: SUBS. ACCESS UNIT
SMCSMC
LINK TO TMN
SMA
STS
SMC
SMM
MCX
SMX
MAS
MIS
SMT
OPERATION &MAINTENANCE TERMINALS CONTROL
TERMINAL
CIRCUITS
VDUTTY
PCM
CSNL
CSND
CSED
HARDWARE STATIONS OF OCB-283
• CSN :SUBS.ACC UNIT• SMC :MAIN CONTROL
STATION
SMCSMC
LINK TO TMN
SMA
STS
SMC
SMM
MCX
SMX
MAS
MIS
SMT
OPERATION &MAINTENANCE TERMINALS CONTROL
TERMINAL
CIRCUITS
VDUTTY
PCM
CSNL
CSND
CSED
HARDWARE STATIONS OF OCB-283
• CSN :SUBS.ACC UNIT• SMC :MAIN CONTROL
STATION• SMA :AUXILIARY EQPT
CONTROL STATION
SMCSMC
LINK TO TMN
SMA
STS
SMC
SMM
MCX
SMX
MAS
MIS
SMT
OPERATION &MAINTENANCE TERMINALS CONTROL
TERMINAL
CIRCUITS
VDUTTY
PCM
CSNL
CSND
CSED
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 STATIONSMCSMC
LINK TO TMN
SMA
STS
SMC
SMM
MCX
SMX
MAS
MIS
SMT
OPERATION &MAINTENANCE TERMINALS CONTROL
TERMINAL
CIRCUITS
VDUTTY
PCM
CSNL
CSND
CSED
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
SMCSMC
LINK TO TMN
SMA
STS
SMC
SMM
MCX
SMX
MAS
MIS
SMT
OPERATION &MAINTENANCE TERMINALS CONTROL
TERMINAL
CIRCUITS
VDUTTY
PCM
CSNL
CSND
CSED
HARDWARE STATIONS OF OCB-283
• CSN :SUBS.ACC UNIT• SMC :MAIN CONTROL
STATION• SMA :AUXILIARY EQPT
CONTROL STATION• SMT :TRUNK CONTROL
STATION
SMCSMC
LINK TO TMN
SMA
STS
SMC
SMM
MCX
SMX
MAS
MIS
SMT
OPERATION &MAINTENANCE TERMINALS CONTROL
TERMINAL
CIRCUITS
VDUTTY
PCM
CSNL
CSND
CSED
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
SMCSMC
LINK TO TMN
SMA
STS
SMC
SMM
MCX
SMX
MAS
MIS
SMT
OPERATION &MAINTENANCE TERMINALS CONTROL
TERMINAL
CIRCUITS
VDUTTY
PCM
CSNL
CSND
CSED
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
SMCSMC
LINK TO TMN
SMA
STS
SMC
SMM
MCX
SMX
MAS
MIS
SMT
OPERATION &MAINTENANCE TERMINALS CONTROL
TERMINAL
CIRCUITS
VDUTTY
PCM
CSNL
CSND
CSED
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
SMCSMC
LINK TO TMN
SMA
STS
SMC
SMM
MCX
SMX
MAS
MIS
SMT
OPERATION &MAINTENANCE TERMINALS CONTROL
TERMINAL
CIRCUITS
VDUTTY
PCM
CSNL
CSND
CSED
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
SMCSMC
SMA
STS
SMC
MCX
SMX
M IS
SMT
OPERATION &MAINTENANCE TERMINALS
CONTROL TERMINAL
CIRCUITS
LINK TO TMN
SMMVDUTTY
PCM
CSNL
CSND
CSED
STANDARD CONFIGURATIONS OF OCB-283
COMPACT (C) CONFIGURATIONSMC : 2 SMA : 2SMT : 1SMX : 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 OR18000 BHCA
LINK TO TMN
SMA
STS
SMC
SMM
MCX
SMX
MAS
MIS
SMT
OPERATION &MAINTENANCE TERMINALS CONTROL
TERMINAL
CIRCUITS
VDUTTY
PCM
CSNL
CSND
CSED
STANDARD CONFIGURATIONS OF OCB-283
SMALL ( P) CONFIGURATIONSMC : 2 +1 BACKUPSMA : 2SMT : 1SMX : 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 OR1,30000 BHCA
SMC
LINK TO TMN
SMA
STS
SMC
SMM
MCX
SMX
MAS
MIS
SMT
OPERATION &MAINTENANCE TERMINALS CONTROL
TERMINAL
CIRCUITS
VDUTTY
PCM
CSNL
CSND
CSED
STANDARD CONFIGURATIONS OF OCB-283
MEDIUM (M) CONFIGURATIONSMC : 2 OR 3 MR+2=5SMA : 2 OR MORESMT : 1 OR MORESMX : 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 OR3,60000 BHCA
SMC
LINK TO TMN
SMA
STS
SMC
SMM
MCX
SMX
MAS
MIS
SMT
OPERATION &MAINTENANCE TERMINALS CONTROL
TERMINAL
CIRCUITS
VDUTTY
PCM
CSNL
CSND
CSED
STANDARD CONFIGURATIONS OF OCB-283
LARGE (G) CONFIGURATIONSMC : 4 TO 7 MR+2
TX+2 SMCSMA : 2 OR MORESMT : 1 OR MORESMX : 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 OR800,000 BHCA
SMC
SWITCHING PRINCIPLE AND DESIGN OF
OCB-283
SWITCHING PRINCIPLE
•1.OCB-283 SWITCH WORKS ON 1.OCB-283 SWITCH WORKS ON SINGLE STAGE SINGLE STAGE TIME SWITCHING TIME SWITCHING PRINCIPLE PRINCIPLE
CALLING PARTY’S TIME SLOT X
CALLED PARTY’S TIME SLOT CALLED PARTY’S TIME SLOT
LRE (X)
LRE (Y)
LRS (X)
LRS (Y)
•2. OCB-283 SWITCH PERFORMS SWITCHING IN 2. OCB-283 SWITCH PERFORMS SWITCHING IN TWO PARELLEL SWITCHING EQUIPMENTS TWO PARELLEL SWITCHING EQUIPMENTS SIMULTANEOUSLY FOR EVERY CALLSIMULTANEOUSLY FOR EVERY CALL
INCOMING LINKS OUT GOING LINKS
CALLING PARTY’S TIME SLOT X
Y Y
SINGLE STAGE TIME SWITCH CONCEPT
01
X
64x32-1=2047
01
Y
64x32-1=2047
TS2047 X TS 0INCOMING LINK CARRYING 2048TIME SLOTS OF 64 INTERNAL LINK EACH OF 32 TIME SLOTSINLET
OUT LET TS2047 Y TS0
SPEECHBUFFER MEMORY
CONTROL MEMORY
Sequential Write
Controlled Read
Sequential Read
Controlled Write
CONTROLUNIT
X
SPEECH OF X
OUTGOING LINK CARRYING 2048TIME SLOTS OF 64 INTERNAL LINK EACH OF 32 TIME SLOTS
X-->YUNIDIRECTIONAL
X
X
X
Y
SMX-A
SMX-B
CONNECTION UNIT ‘Y’
SAB A
LRE Y(A)
LRS Y(A)
LRE X(A)
LRS X(A)
LRE X(B)
LRS X(B)
LRE Y(B)
LRS Y(B)SAB B
SAB A
SAB B
X
Y
SWITCHING IN OCB-283IN TWO BRANCHES OF SMX
MLCOM
MLCOM
CONNECTION UNIT ‘X’
SMC1 SMC2 SMC3 SMC4 SMC5
SMMA SMMB
SMX 1A
SMX1B
CSNL
SMT SMA1
SMA2
SMA3
0
10123
012
34
5678
MAS 2 (A & B)
MAS 1 (A & B)
MIS A & B
OCB-283DIAGRAM
TOKEN RINGSMIS MAS 1 & MAS 2
GLR( A & B) GLR (A & B)
OCB-283EXCHANGE
TYPICAL OCB-283 EXCHANGE TYPICAL OCB-283 EXCHANGE
PCMS
MAS 2 (A & B)
SMC1 SMC2 SMC3 SMC4 SMC5
SMMA SMMB
SMX 1A
SMX1B
CSNL
SMT SMA1
SMA2
SMA3
GLR( A & B)0
1
0123
GLR (A & B)012
34
5678
MIS A & B
OCB-283EXCHANGE
TOKEN RINGSMIS MAS 1 & MAS 2
SPEECH PATH IN OCB-283SPEECH PATH IN OCB-283
1 A
2A
8A
1 B
2B
8B
CSNL
SMT
SPEECH PATH IN OCB-283SPEECH PATH IN OCB-283
GLR 1B
GLR 0B
GLR 0A
GLR 1A
GLR B
01
23
GLRA
01
23
GLR OA
GLR OB
SMA
PCM
PCM
SMX
SMX1 GLR =8 LRs
A SW
ITCH
B SW
ITCH
SUBSCRIBER.ACCESS
SWITCHING MATRIX
AUXILIARYEQPT
CIRCUITCONNECTION
EQPT.
NETWORK LINK LR’s (GROUP OF LR’s)
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
OCB-283
SWITCH
CNE CNL
CNL
PCM
256 SUBS.
CSNL
CSND
PCM
CNE
256SUBS
256SUBS
256SUBS
CSN BASIC RACK
CSNBASIC RACK
PCM
TCRMT
GTAUCX1UCX0
TOND
TOND
TCRMT
SUBSCRIBER ACCESS UNITSCSNL OR CSND RACKS
TCRMT
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
TCRMT
TCRMT
TCRMT
CNL OR ICNE
CNL OR ICNE
TCRMT
TCRMT
TCRMT
BASIC RACKBASIC RACK
EXTENSION RACKSEXTENSION RACKS
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
LRLI
NKS
TO
SMX
TCRMT
GTAUCX1UCX0
TOND
TONDTCRMT
SUBSCRIBER ACCESS UNITSCSNL OR CSND RACKS
TCRMT
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
TCRMT
TCRMT
TCRMT
CNL OR ICNE
CNL OR ICNE
TCRMT
TCRMT
TCRMT
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
LRLI
NKS
TO
SMX
TCRMT
GTAUCX1UCX0
TOND
TOND
TCRMT
TCRMT
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
TCRMT
TCRMT
TCRMT
CSN BASIC RACKCSN BASIC RACK
GTAUCX1UCX0
TOND
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
TBALAM
TBUCN
TBABM2
TBABM2
TBABM2
TBABM2
CSNL OR CSND SHELF NAMES BASIC RACKBASIC RACK
TOND
TCRMT
TCRMT
TCRMT
TCRMT
TCRMT
TCRMT
POWERSUPP INTERFACE
INTERFACE WITHEXCHANGE
TCRMT
GTAUCX1UCX0
TOND
TOND
TCRMT
TCRMT
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
TCRMT
TCRMT
TCRMT
CSN BASIC RACKCSN BASIC RACKFOR FOR CSNLCSNL
SUBS. CONNECTIONSHELFS
AUX. EQPT
CONTROL LOGICS
PCMPCM
GLR TO SMX A
GLR 0&1(B)GLR 0&1(B)GLR0 &1(A)GLR0 &1(A)
1 GLR= 8 LRSTWO GLR/CSN
CNECNE
GLR TO SMX B
CSN HARDWARE CONFIGURATION
DIGITAL CONTROL UNITDIGITAL CONTROL UNIT UCNUCN
IN CASE OF CSNLTCILR
IN CASE OF CSNLTCBTL
UCX0 UCX1
TCCS
TCCS
TPUCB
TMUC2M
TMQR
TRCX
TRCX
TRCX T
SUC
TRCX
TRCX
TMQR
TMUC2M
TPUCB
TCCS
TCCS
THLR
THLR
TRF8B
*
TRF8B
*
TFILMB
*
TRCX
TTRS0
TTRS2
TTRS1TTRS3
T TRS13 12 9 8 5 4TTRS15 14 11 10 7 6
TCCOB
TOND 80 (0)
TOND 80 (1)
~40 V
~ 40 V
TBTD
B
TBTD
A
TPOS
TCRMT
TCRMT
TSURV2
TSURV2
TSURV2
TSURV2
TCRMT
T5V17
T5V17
GTA
TMLAB
CSND BASICRACK
TBALAN
TBUCN
* PCB’S NOT USED INCSNL
TCRMT
GTAUCX1UCX0
TOND
TOND
TCRMT
TCRMT
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
TCRMT
TCRMT
TCRMT
CSN BASIC RACKCSN BASIC RACKFOR FOR CSNDCSND
SUBS. CONNECTIONSHELFS
AUX. EQPT
CONTROL LOGICS
PCMPCM
1 GLR= 8 LRSTWO GLR/CSN
CNECNE
2 ~ 16 PCMSTOWARDS EXCHANGE
CSN EXTENSIONCSN EXTENSIONRACKRACK
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
PCMPCMCNECNE
LOCALSUBSS. CONCENTRATOR
REMOTESUBSS. CONCENTRATOR
INTERFACE
REMOTESUBS.CONN.
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
EXPANDED VIEW OF EXPANDED VIEW OF C N L SHELFC N L SHELF
TABA
TABA1
TABA
TABA
TABA0
TPOL
TABA
THLR
THLR
TABA15
TCRMT
TABA
TABA
TABA
TABA
CN CN :- :- DIGITAL SUBS. CONCENTRATORDIGITAL SUBS. CONCENTRATORMAXIMUM 256 SUBS./SHELFMAXIMUM 256 SUBS./SHELF
SUBSCRIBER CARDSSUBSCRIBER CARDS16 SUBS / CARD16 SUBS / CARDMAX. 16 CARDSMAX. 16 CARDS
DETAILS OF CN SHELFDETAILS OF CN SHELF
TCRMT
TPOL
THLR
THLR
TABA
TABA
•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 STATION : SMX
SWITCHING MATRIX SCHEMETIC
• SINGLE STAGE TIME SWITCHING• SWITCHING CAPACITY-2048 LR’S• 1 LR IS 32 CHANNEL PCM - 30 USED
FOR VOICE1
2
3
4
5
6
7
8
LR0LR255
COM
LR0LR255
LR 2047LR 2047
.T.
LRE 0
LRE 255
LR E 256
LRE 511
LRE 512
LRE 767
LRE 768
LRE 1023
LRS 0
LRS 255
LRS 256
LRS 511
LRS 512
LRS 767
LRS 768
LRS 1023
256x256 SQUARE MATRICES256x256 SQUARE MATRICES
SWITCHING MATRIX BLOCK DIAGRAM SWITCHING MATRIX BLOCK DIAGRAM
SMX 1
SMX 2
SMX 3
SMX 4
0~63 I/L
64~127
128~191
192~255
64x64
0~63 O/L
64~127 O/L
128~191 O/L
192~255 O/L
256x256 SQUARE MATRIX
EXPANDED VIEW
64 x64 BASIC
SQUARE MATRIX
SWITCHING FROM X-Y
01
X
64x32-1=2047
01
y
64x32-1=2047
TS2047 X TS 0I/C LINK CARRYING 2048TIME SLOTS OF 64 LRE LINKEACH OF 32 TIME SLOTS
INLET
OUT LET TS2047 Y TS0
SPEECHBUFFER MEMORY
CONTROL MEMORY
W
R
R
W
CONTROLUNIT
X
SPEECH OF X
SWITCHING FROM Y-X
01
Y
64x32-1=2047
01
X
64x32-1=2047
TS2047 Y TS 0I/C LINK CARRYING 2048TIME SLOTS OF 64 LRE LINKEACH OF 32 TIME SLOTS
INLET
OUT LET TS2047 X TS0
SPEECHBUFFER MEMORY
CONTROL MEMORY
W
R
R
W
CONTROLUNIT
Y
SPEECH OF Y
TWO WAY SWITCHING OF TIME SLOTS OF X->Y & Y->X IN SINGLE STAGE TIME SWITCH OF OCB-283
SWITCH OF Y
BASIC 64x64 SQUARE MATRIXCORRESPONDING TO LRE OF X
SWITCH OF X
BASIC 64x64 SQUARE MATRIXCORRESPONDING TO LRE OF Y
SMX 1 SMX 3 SMX 5 SMX 7
SMX 1
SMX 2
SMX 1 (EX)
SMX 2 (EX)
SMX 3
SMX 4
SMX2 (EX)
SMX 4 (EX)
SMX5
SMX6
SMX 5 (EX)
SMX 6 (EX)
SMX 7
SMX 8
SMX 7 (EX)
SMX 8 (EX)
B BRANCHB BRANCH
A BRANCHA BRANCH
SWITCHING RACKS OF OCB-283 (FOR 1024 LRS )4 SMX SWITCHES IN EACH 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
SMASMA SHELFSHELF
SMA : AUXILIARY EQPT. STATIONSMA : AUXILIARY EQPT. STATION IN OCB-283IN OCB-283
SMC
SMC
SMA
SMC
SMA
TRUNK MULTIPLEX CONTROL STATION : SMT
• SMT IS THE HARDWARE STATION WHERE THEEXTERNAL 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)PCMTERMINATIO
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.
SMM RACK
SMT
SMT
SMT RACK
PCM
PCMDDF
SMX RACK
LR LINKS
SMC1 SMC2 SMC3 SMC4 SMC5
SMMA SMMB
SM
CSNL
SMT
0
1
0123
01
34
MIS A & B
OCB-283DIAGRAM
TOKEN RINGSMIS MAS 1 & MAS 2
GLR( A & B) GLR (A & B)
OCB-283EXCHANGE
PCMS
OCB-283 BLOCK DIAGRAM
CONTROL STATIONS OF OCB-283
MAIN MAIN MULTI PROCESSORMULTI PROCESSOR
CONTROLCONTROLSTATIONS :SMCSTATIONS :SMC
MAIN CONTROL STATION: SMC
SMC IS THE HARDWARE STATION FOR LOADING COMMON CONTROL FUNCTIONS MR,TR,MQMR,TR,MQTX,GX, & PC TX,GX, & PC IN SOFTWARE FORMIN SOFTWARE FORM
IN PHYSICAL FORM ONE SMC IN PHYSICAL FORM ONE SMC OCCUPIES ONLYOCCUPIES ONLY ONE SHELF ONE SHELF OFOFA RACK A RACK
SMA
SMA
SMC
SMC
SMC
SMMA SMMB
SMC1 SMC2 SMC
SMX 1A
SMX1B
CSNL
SMT SMA1
SMA2
SMA3
0
1
0123
012
34
5678
MAS 2 (A & B)
MAS 1
MIS A & B
GLR( A & B) GLR (A & B)
PCMS
OCB-283 BLOCK DIAGRAM
MAINTENANCE STATIONS OF OCB-283
MAINTENANCEMAINTENANCESTATIONSSTATIONSSMM A&BSMM A&B
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
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
MAINTENANCE STAIONS SMM(A) & SMM(B)
ALARMS ANNOUNCE PERIPH
DISK 2
DISK 1SMM A
SMMB
STS
SMC1 SMC2 SMC3 SMC4 SMC5
SMMA SMMB
SMX 1A
SMX1B
CSNL
SMT SMA1
SMA2
SMA3
0
1
0123
012
34
5678
MAS 2 (A & B)
MAS 1 (A & B)
MIS A & B
OCB-283DIAGRAM
TOKEN RINGSMIS MAS 1 & MAS 2
GLR( A & B) GLR (A & B)
MAL
PCMS
MIS
MAS
MAS MAS : : MAS CAN BE FROM 0 TO 4 RINGS & ARE DUPLICATED AS A & BMAS CAN BE FROM 0 TO 4 RINGS & ARE DUPLICATED AS A & B
MIS MIS : : MIS IS ONE RING DUPLICATED AS A & BMIS IS ONE RING DUPLICATED AS A & B
MAL :MAL : ALARM RINGS CAN BE UPTO 5 AND DUPLICATED AS A & BALARM RINGS CAN BE UPTO 5 AND DUPLICATED AS A & B
COMMUNICATION MULTIPLEXESCOMMUNICATION MULTIPLEXES
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)
PCWAMPCWAM• 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
SMM
CONTROL TERMINAL
PC WAM
MIS
PC WAM
PGS / T IPGS / 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
SMM
CONTROL TERMINAL
MIS
PGS/TI
CONTROL TERMINALSCONTROL 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
SMM
CONTROL TERMINAL
MIS
OPERATORS VDU TERMINALSOPERATORS 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
SMM
CONTROL TERMINAL
MIS
VDU PRINTER
SMC1 SMC2 SMC3 SMC4 SMC5
SMMA SMMB
SMX 1A
SMX1B
CSNL
SMT SMA1
SMA2
SMA3
GLRA & B
0
1
0123
GLRA & B
012
34
5678
MAS 2 (A & B)
MAS 1 (A & B)
MIS A & B
OCB-283DIAGRAM
TOKEN RINGSMIS MAS 1 & MAS 2
MAINTENANCE COMMANDSHARDWARE EQUIPMENT’S STATUS INTERROGATION
@ ESMIN:@ AM=SMC;OR @ AM=SMCx;OR @ ; OR
@ TELIN:@ AFUR=1<63;
@ ESMIN:@ AM=SMT;OR@ AM=SMTx;OR@ AM=SMTAx;OR AM=SMTBx;
@ ESMIN:@AM=SMA;OR AM=SMAx;
@ AM=SMM;OR SMMA; OR SMMB;
@ ESMIN:@ AM=SMX;OR AM=SMXn;OR AM=SMXAn;OR AM=SMXBn;
@ AMXIL:@ AMX=MIS; OR AMX=MAS;OR AMX= MISAOR AMX=MISBOR AMX=MASAn;OR AMX=MASBn;
SMX1 ( A &B)
SMX8 ( A &B)
CSNn
AFUR=n
SMAnSMAnAM=SMAnAM=SMAn
SMTnSMTnAM=SMTnAM=SMTn
AFGRU=UR-GLR
AFGRU=n-0
AFGRU=n-1
AFGRA=n-0
AFGRT=n-0
AFGRT=n-1
AFGRT=n-2
AFGRT=n-3
0123
31
AFGRX=SMX-GLR
AFGRX=1-2
AFGRX=1-3AFGRX=1-15
AFGRX=1-29
AFGRX=2-8
AFGRX=3-3
CONNECTION OF LR’s IN THE FORM OF GROUP OF LR’s-> GLR TO SWITCHING MATRIX STATION SMX
AFGRA=SMA-GLR
AFGRT= SMT-GLR
ADDRESSING OF GLR ‘s WITH RESPECT TO CONNECTION UNITS & WRT TO SMX IN OCB-283 SOFTWARE
AFGRX=2-11 SMX2 ( A &B)
SMX3 ( A &B)
PCM
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 DEMANDCONCERNS TO ONLY LIMITED CHANNELS
*METHODS OF CHECKING
CHECK BY TRANSMISSION CHECKCOMPARISON OF IN EACH BRANCHBRANCHES SEPARATELY
SIMPLE SOPHISTICATEDMEANS:- PARITY PARITY CRC TYPE :- PERMANENT PERMANENT ON REQUEST
SMX
SWITCHING IN OCB-283 DEFINITION OF ADDITIONAL BITS IN SAB FUNCTION
8 9 10 11 12 13 14 15
TSi
8 SPEECH BITS 8 SP 8 ADDSAB
LAE LASCONNECTION UNIT LRS A&B
TSi3.9 mics 3.9 mics
8 SPEECH BITS
PERMANENT MODE MULTIFRAME MODEBIT 13 =0 BIT 13=1 (SYNC WORD)BIT 14=0 (HOMOLOGOUS RESULT BIT 14=CONTROL BITOF LRS A&B TSi ON LRE-TSi :IF NOT,=1)BIT 15= PARITY BIT 15= CRC BIT
ADDITIONAL BITS
ADDITIONAL 8 BITS
0 1 2 3 4 5 6 7
LRE A&B
MODES OF OPERATION
PHYSICAL DIMENSIONS OF OCB-283PHYSICAL 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
UB
SMC
SMT-A
SMT-B
SMA
SMA
1 SMC+1 SMT+2 SMA
UC
SMC
SMA
SMA
SMA
SMA
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
SMC
SMT-A
SMT-B
SMT-A
SMT-B
1SMC+ 2 SMT’s
CB
SMC
SMC
SMC
SMA
SMA
3 SMC + 2 SMA
UA
SMC
SMT-A
SMT-B
SMT-A
SMT-B
1 SMC+ 2 SMT’s
XA
SMX1
SMX2
SMX E
SMX E
Only SMX’s
CA
1 SMC +STS+SMMA/B
SMC
STS
SMMA
AL ANN PER
SMMB
DBM
MTU
CC
SMC
SMC
SMC
SMC
SMC
5 SMCs
2000mm
16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
TR07
TR06
TR05
TR04 CSN030
CSN031
CSN040
CSN041
CSN050
CSN051
CSN060
CSN061
XA2BXA1BUC2UD1CSN010
CSN011
XA2AXA1ACB1SDE1UC1CADBM
CSN020
CSN021
UE1
LAY OUT OF AN OCB-283 SWITCH ROOM
EXAMPLE :-BOMBAY SION TELEPHONE EXCHANGE
VDU
OPERATION ROOM
SWITCH ROOM ALL DIMENSIONS IN MM
VDU VDU VDU
950
690
800
1500
IRP
ACDB
CONNECTION UNITS’ UR DESIGNATION NUMBERING IN OCB-283
TYPE OF CONN.UNIT S/W MACHINE RANGE OF UR NO.S
CSN MLCSN 1TO 63 1 UR PER CSN
SMT MLURM 223 TO 64 STARTING FROM HIGHEST 8 MODULE OR UR NO PER SMTUR NO FOR FIRST MODULE FOR SMT 1G & OF FIRST SMT 32 MOD. OR UR PER SMT-2G
SMA MLETA/ 256 TO 224MLPUPE 1 UR NO PER SMA
1 2 3 4 63 64 223 224 256
CSN 1~63 SMT 1SMT20SMA1
UR NUMBERING SCALE UR #
SMA32
DIMENSIONING OF OCB-283
• CALCULATING LR ‘sCALCULATING LR ‘sMODULARITY OF LR’s (30 voice channel carrying links)
Minimum 8 LRs called GLR can be installedTYPE OF CONN. UNIT LR REQUIRED GLRS
CSNL 16 2SMT 1G 32 4SMT 2G 128 16SMA 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
• CALCULATING SWITCHING MATRIX SIZECALCULATING SWITCHING MATRIX SIZEMODULARITY OF SMX
SMX :- Maximum 256 LRs or 32 GLRs/SMXXA RACK:- 2 SMX STATIONS/ XA RACKRCID CARD SLOTS PER XA RACK =32
TOTAL NO OF SMX STATIONS REQUIRED = TOTAL GLRs/32
TOTAL NO OF XA RACKS NEEDED =TOTAL SMXs/2WITHIN SMX MODULARITY OF :-
RCID CARD 16 LRs or 2 GLRsRCMT CARD 64 LRs or 8 GLRsRCSM 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 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 2 ACHIL CARD GIVING 1 PUPE
ONE PUPE IS KEPT SPARE AS STANDBYE
DIMENSIONING OF OCB-283
• CALCULATION OF SMCs 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 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 2000 (OR 3000) CHARGING REGISTERS
DIMENSIONING OF OCB-283
DIMENSIONING OF OCB-283• CALCULATION OF SMCs 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 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=1016 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 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 18 CA/S 2 - 2
2.MQ,GX,TR,TX,PC 50 CA/S 2 - 2
3.MQ,GX,PC 110 CA/S 2 - 2
4.TR 110 CA/S 2 - 2
5.TX 110 CA/S 2 - 2
6.MR 36 CA/S 2 - 7
Standard Configurations of OCB-283 ExchangesCONFIGURATION 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 2 ONLY 5 CA/S OR 18000
CA/H SMALL P MR,TR,TX,MQ,GX,PC 2 + 1 RES 36 CA/S OR 130000 CA/H
MEDIUM M TR,TX,MQ,GX,PC 2 100 CA/SOR 360000 CA/H
M R 2 ~3 +1 RES
LARGE G TR,MQ,GX,PC 2 220 CA/S OR 800000
CA/H MR 4 TO 7 +1 RES
TX 2
POWER DISTRIBUTION & CONSUMPTION IN POWER DISTRIBUTION & CONSUMPTION IN OCB-283OCB-283
EXCHANGE GETS POWER FROM -48 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 4 A
SMA 24 A 3 A
SMX
SMT1G 34 A 4.5 A
SMT2G
SMM
CSN B
CSN E
SDE RACK
FUSES
-48V
0 V
EXC
AH
NG
E
EAR
TH
ACTIVITY DAYS01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
MARKINGTILE CUTTING
BASE PLATE FIXINGRACK FIXING AND ALIGNMENT
FIXING DCDB, ACDB, IRP, ALARM BOXLAYING DCDB TO SDE POWER CABLE
LAYING O/P CABLE TO DCDB POWER CABLELAYING SDE TO RACK ENERGY CABLES
INTER RACKS AND INTER CSNL CABLINGSMM TO IRP CABLES
ACDB TO PERIPHERALS POWER CABLESIRP 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
CHART OF INSTALLATION ACTIVITIES OF A MEDIUM SIZE OCB-283 EXCHNAGEIN DAYS
THE CONCEPT OF MODERN COMMUNICATION
ISDN :
YOR ARE HERE IN SOUTH AMERICA
ON VACATIONS AT BEACH WITH YOUR LAPTOP MOBILE
COMPUTER /COMMUNICATOR
WASHING MACHINE
INTERACTIVE SATTELLITE & CABLE TV SERVICES WILL
BE CONTROLLED BY HOME COMPUTER
TVOVEN
YOUR COMPUTER WILL TALK TO
ELECTRICITY AUTHORITIES TO DECIDE WHEN
TO PUT ON THE WASHING MACHINES
YOU CAN ORDER YOUR CURTAINS TO BE
OPENED OR CLOSED DEPENDING UPON
WHEATHERYOU CAN ORDER YOUR AC
TO ON/OFF
AC
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
HOME COMPUTER/COMM. SYSTEM
YOR FUTURISTIC HOME IN INDIAN VILLAGE
FROM CARPHONE YOUR WIFECAN ORDE R OVEN TO START
ISDN : CONCEPT OF FUTUREISTIC HOME& COMMUNICATION
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