GENERAL ARCHITECTURE OF OCB-283

1
GENERAL ARCHITECTURE OF OCB-283

• SUBSYSTEMS FUNCTIONS OF OCB-283

2
GENERAL FUNCTIONAL BREAKDOWN OF ALCATEL 1000 E-10
(OCB-283)
CCITT 7 SIGNALING NETWORK
TELEPHONE NETWORK
SUBSCRIBER ACCESS SYSTEM
CONNECTION AND CONTROL
DATA NETWORK
VALUE ADDED NETWORK
DISK
OPERATION AND MAINTENANCE
OM NETWORK
PABX
MAGTAPE
3
OCB-283 ARCHITECTUREOCB-283 COMPRISES OF
FOLLOWING 3 SUBSYSTEMS
CCITT 7 SIGNALING NETWORK

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

TELEPHONE NETWORK
SUBSCRIBER ACCESS SYSTEM
CONNECTION AND CONTROL
DATA NETWORK
VALUE ADDED NETWORK
DISK
OPERATION AND MAINTENANCE
OM NETWORK
PABX
MAGTAPE
4
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 CCITT7
  reccommendations .

5
INTRODUCTION OF OCB-283

• Exchange has got 3 basic subsystems -
• 1 SUBSCRIBER ACCESS SUBSYSTEM
• 2 CONNECTION CONTROL SUBSYSTEM
• 3. OPERATION MAINTENANCE SUBSYSTEM

6
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.

7
INTRODUCTION OF OCB-283

• 2. Control Connection Subsystem is the block
  consisting of
• A-CONTROL FUNCTIONS
• B-CONNECTION SWITCHING EQUIPMENTS

8
INTRODUCTION OF OCB-283

• A-CONTROL FUNCTIONS

• COMPRISE OF COMMON CONTROL equipments which
• process
• monitor
• control the call setup release

9
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
• RSUs
• Auxiliary Equipments for Tones ,Frequencies
  other auxillaries for signalling protocol
  handling .

10
INTRODUCTION OF OCB-283
3. OPERATION MAINTENANACE SUBSYTEM - FOR OM
OF EXCHANGE BY OPERATORS
11
INTER NETWORKING WITH OTHER SYSTEMS

• THE OCB-283 CAN BE CONNECTED TO ANY TECHNOLOGY
  SWITCHES PROVIDED -THEY CATER TO STANDARD
  SIGNALLINGS

12
STANDARD SIGNALLINGS

• CHANNEL ASSOCIATED
• STEP BY STEP
• R2 MF
• COMMON CHANNEL SIGNALLING

13
LET US NOW UNDERSATANDCOMMON CHANNEL
SIGNALINGBEFORE GOING FURTHER
14
OCB-283 FOLLOWS CCITT-NO 7 SIG.PROTOCOL FOR
COMMON CHANNEL SIGNALING
COMMON SIGNALING CHANNEL
EXCHANGE B
EXCHANGE A
VOICE CHANNELS
EXCHANGE C
SIGNALING TIME SLOT LINK CARRIES ALL THE
SIGNALING FOR ALL THE VOICE CHANNELS BETWEEN TWO
EXCHANGES
15
OCB-283 USES COMMON CHANNEL SIGNALING BETWEEN ITS
SUBSCRTIBER ACCESS SUBSYSTEM REST OF THE
EXCHANGE EQUIPMENTSLET US SEE HOW SUBS ACCESS
UNITS - CSNS USECOMMON CHANNEL SIGNALING CCS7
16
CSN 1
CSN 2
PS 1
PS 2
CSN 3
COC
PS 3
RSU
EXCH. COMMON PS255 (LOCAL)
PS 4
CSN 4
CSN 5
PS 5
PS 63
CSN 63
OCB-283
COC- COMMON SIGNALING CHANNEL
CCS SIGNALING POINTS IN REFERENCE TO OCB-283s
SUBSCRIBER ACCESS UNITS CSNS
17
COC- COMMON SIGNALING CHANNEL
LOCAL
CSN 1
CSN 2
PS 1
PS 2
CSN 3
CIC- VOICE CHANNELS
PS 3
RSU
PS 4
EXCH 1 PS2000 SP1
COC0
CSN 4
CSN 5
COC1
PS 5
COC- COMMON SIGNALING CHANNEL
PS 63
NATIONAL
CSN 63
OCB-283
STP PS-2033
PS SIGNALING POINT NO STPSIGNAL TRANSFER
POINT CSNs ARE GIVEN LOCAL VERSION OF PS
No. EXCHANGES STP GET NATIONAL PSNo.
CCS SIGNALING POINTS FOR OCB-283 IN NATIONAL
NETWORK
18
functional architecture of OCB-283
19
OCB-283 FUNCTIONAL DIAGRAM
CSNL
SMX
LR (4MB / S)
DT
CSND
BT
2 MB/S PCM
MCX
LR
SMT URM
LR
COM
ETA
PU PE
CKTS
SMA
COMMUNICATION MULTIPLEX
TMN
OM
20

• 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 )

21

• Control Units
• - These units provide control of calls on the
  basis of Stored programs
• they process the calls on reception of dialed
  digits from calling subscriber/ circuit take
  part
• in handling of call setup release by
  processing .monitoring, measuring charging of
  call
• all other common control function s needed for
  working of an Automatic Common Control
• Exchange.
• - These Control units can comprise of following
  Functions
• FUNCTION NAME OF UNIT NATURE OF JOB
• MR Multiregister Call-handler
  SET UP RELEASE OF CALL
• TR Translator Translation of
  digit ,Data-bank of subs ckts in files
• MQ Marker Message distribution
  between Common Control
• Connection units
• TX Charger Computing the charge
  of a call, keeping meters
• GX Matrix System Handler Processes
  makes connections in Switching
• matrix on the orders of MR or
  MQ
• PC Common Channel Signaling Manages the CCS7
  network for signaling

22
SUBSCRIBER ACCESS SUBSYSTEM
CSNL
SMX
LR (4MB / S)
DT
CSND
BT
2 MB/S PCM
MCX
LR
SMT URM
LR
COM
ETA
PU PE
CKTS
SMA
COMMUNICATION MULTIPLEX
TMN
OM
23
SUBSCRIBER ACCESS SUBSYSTEM
OCB-283

• 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

24
CONNECTION SUBSYSTEM
CSNL
SMX
LR (4MB / S)
DT
CSND
BT
2 MB/S PCM
MCX
LR
SMT URM
LR
COM
ETA
PU PE
CKTS
SMA
COMMUNICATION MULTIPLEX
TMN
OM
25
CONNECTION SUBSYSTEM

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

26
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

27
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 PCMs (HDB3) TO BINARY
  VICEAVERSA MAKES LR LINKS TOWARDS SMX FOR
  SWITCHING
• SMT CAN CONNECT PCMs FROM (a) CSND (RSUS)
  OR (b)CSED (RLUs) OR (c) PCMs FROM
  A DISTANT EXCHNAGE

28
AUXILIARY EQUIPMENT UNITS SMA

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

29
OCB-283 FUNCTIONAL DIAGRAM
CSNL
SMX
LR (4MB / S)
DT
CSND
BT
2 MB/S PCM
MCX
LR
SMT URM
LR
COM
ETA
PU PE
CKTS
SMA
COMMUNICATION MULTIPLEX
TMN
OM
30
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.

31
ROLE OF COMMON CONTROL FUNCTIONS

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

32
OCB-283 FUNCTIONAL DIAGRAM
CSNL
SMX
LR (4MB / S)
DT
CSND
BT
2 MB/S PCM
MCX
LR
O M SUBSYSTEM
SMT URM
LR
COM
ETA
PU PE
CKTS
SMA
COMMUNICATION MULTIPLEX
TMN
OM
33
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

34
OCB-283 FUNCTIONAL DIAGRAM
CSNL
SMX
LR (4MB / S)
DT
CSND
BT
COMMUNICATION MULTIPLEX
2 MB/S PCM
MCX
LR
SMT URM
LR
COM
ETA
PU PE
CKTS
SMA
COMMUNICATION MULTIPLEX
TMN
OM
35
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

36
TIME BASE
OCB-283 FUNCTIONAL DIAGRAM
CSNL
SMX
LR (4MB / S)
DT
CSND
BT
2 MB/S PCM
MCX
LR
SMT URM
LR
COM
ETA
PU PE
CKTS
SMA
COMMUNICATION MULTIPLEX
TMN
OM
37
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

38
OCB-283 FUNCTIONAL DIAGRAM
LR LINKS
CSNL
SMX
LR (4MB / S)
DT
CSND
BT
2 MB/S PCM
MCX
LR
SMT URM
LR
COM
ETA
PU PE
CKTS
SMA
COMMUNICATION MULTIPLEX
TMN
OM
39
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
• LRs ARE PAIR OF UNIDIRECTIONAL DIGITAL TIME
  DIVISION MULTIPLEXED PATHS
• LRE -gt ENTERING SMX
• LRS -gt LEAVING SMX
• THESE CARRY 32 TIME SLOTS IN A TIME FRAME OF
  125 MICROSECOND WITH 16 BITS PER TIME SLOT
• LRs WORK ON 4.096 Mega Bits Per Second RATE
• LRs ARE ALSO CALLED MATRIX LINKS

40
IN OCB-283
41
CALL PROCESSING

• FUNCTIONAL EQUIPMENTS INVOLVED IN CALL HANDLING

MCX
CSNL
CSNL
SC
SC
VC
VC
CSND
URM
ETA
SC
COM
PU/PE
CKTS
SC
MAS
TR
MR
MQ
GX
PC
TX
MIS
SC Signalling channel VC Voice channel
OM
42
CALL PROCESSING
NEW CALL ORIGINATION

• TS-16 OF LR 0 LR 1 OF CSN ARE SIGNALING
  CHANNELS SC BETN. CSN THE EXCHANGE EQUIPMENT
  (PU/PE)

43
CALL PROCESSING
NEW CALL ORIGINATION

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

44
CALL PROCESSING
CALLING SUBS. COS IDENTIFICATION

• NEW CALL MESSAGE IS SENT TO MR BY PUPE.

45
CALL PROCESSING
CALLING SUBS. COS IDENTIFICATION

• NEW CALL MESSAGE IS SENT TO MR BY PUPE.
• MR REQUESTS CALLING SUBSCRIBER DATA FROM TR
  ..OVER MIS
• TR PROVIDES CALLING SUBS COS DATA TO MR

46
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

47
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 ETAs TS-LRE TO MCX)

MCX
CSNL
CSNL
SC
SC
VC
DT
CSND
URM
ETA
SC
COM
PU/PE
CKTS
SC
MAS
TR
MR
MQ
GX
PC
TX
MIS
SC Signalling channel VC Voice channel
OM
48
CALL PROCESSING
RECEPTION OF FIRST DIGIT

• FIRST DIGIT IS RECEIVED VIA VOICE CHANNEL VC IN
  RGF OF ETA (FOR DTMF SUBS.)

MCX
CSNL
CSNL
SC
SC
VC
CSND
URM
ETA
RGF
SC
COM
PU/PE
CKTS
SC
MAS
TR
MR
MQ
GX
PC
TX
MIS
SC Signalling channel VC Voice channel
OM
49
CALL PROCESSING
RECEPTION OF FIRST DIGIT

• FIRST DIGIT IS RECEIVED VIA VOICE CHANNEL VC IN
  RGF OF ETA (FOR DTMF SUBS.)
• ETA SENDS IT TO MR ON MAS
• DIAL TONE IS CUT OFF ON ORDERS OF MR

MCX
CSNL
CSNL
SC
SC
VC
CSND
URM
ETA
RGF
SC
COM
PU/PE
CKTS
SC
MAS
TR
MR
MQ
GX
PC
TX
MIS
SC Signalling channel VC Voice channel
OM
50
CALL PROCESSING
DIGIT ANALYSIS

• FIRST FEW DIGITS ARE PRE-ANALYSED ON REQUEST OF
  MR BY TR
• REMAINING DIGITS MAY BE STILL BEING RECEIVED

MCX
CSNL
CSNL
SC
SC
VC
CSND
URM
RGF
SC
COM
PU/PE
CKTS
SC
MAS
TR
MR
MQ
GX
PC
TX
MIS
SC Signalling channel VC Voice channel
OM
51
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

MCX
CSNL
CSNL
SC
SC
A
B
VC
CSND
URM
RGF
SC
COM
PU/PE
CKTS
SC
MAS
TR
MR
MQ
GX
PC
TX
MIS
SC Signalling channel VC Voice channel
OM
52
CALL PROCESSING
CALLED PARTY ANSWERS

• CALLED PARTY B GOES OFF HOOK
• CALLED PARTYS CSN SENDS LOOP CONDITION VC-B
  INFORMATION TO MR OVER SC VIA PUPE
• RINGING CURRENT RBT ARE STOPPED

MCX
CSNL
CSNL
SC
SC
VC-B
VC-A
CSND
URM
RGF
SC
COM
PU/PE
CKTS
SC
MAS
TR
MR
MQ
GX
PC
TX
MIS
SC Signalling channel VC Voice channel
OM
53
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

MCX
CSNL
CSNL
SC
SC
VC-B
VC-A
CSND
URM
RGF
SC
COM
PU/PE
CKTS
SC
MAS
TR
MR
MQ
GX
PC
TX
MIS
SC Signalling channel VC Voice channel
OM
54
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

MCX
CSNL
CSNL
SC
SC
VC-B
VC-A
CSND
URM
RGF
SC
COM
PU/PE
CKTS
SC
MAS
TR
MR
MQ
GX
PC
TX
MIS
SC Signalling channel VC Voice channel
OM
55
OCB-283 EXCH
AND YOUR METER IS RUNNING HERE!!!
56
HARDWARE ARCHITECTURE OF OCB-283
57
HARDWARE ARCHITECTURE OF OCB-283
16 LRS
CSNL
MCX
STS 1x3
PCM
CSND
LR
SMX (1 TO 8)x2
SMT (1 TO 64)x2
2TO 16
CSED
LR
SMA 2 TO 64
2 TO 4
MAS (1 TO 4) AB
CIRCUITS
SMC (2 TO 32)
SMC
MIS 1 AB
VDU TTY
SMM
OPERATION MAINTENANCE TERMINALS
CONTROL TERMINAL
LINK TO TMN
58
OCB-283 COMPONENTS

• 1. SUBSCRIBER ACCESS UNIT CSN - CALLED
  DIGITAL SUBSCRIBER CENTRE CSN
• IT CAN BE LOCAL -gt CSNL
• OR DISTANT -gtCSND
• 2.CIRCUIT TERMINATION UNIT SMT - CIRCUITS ARE
  TERMINATED ON TRUNK MULTIPLEX CONNECTION UNIT
  ITS FUNCTION IS CALLED URM

59
OCB-283 COMPONENTS

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

60
OCB-283 COMPONENTS

• 5. SWITCHING MATRIX UNIT
• CALLED SWITCHING MATRIX STATION SMX COMPRISES OF
• SWITCHING MATRIX-gtMCX
• SWITCHING SOFTWARE FUNCTION CALLED -gt
  COM
• 6.OPERATION MAINTENANCE UNIT SMM - ITS
  FUNCTION IS CALLED OM
• 7. COMMUNICATION MULTIPLEX- THESE ARE MIS
  MAS

61
HARDWARE STATIONS OF OCB-283

• CSN SUBS.ACC UNIT
• SMC MAIN CONTROL STATION
• SMA AUXILIARY EQPT CONTROL STATION
• SMT TRUNK CONTROL STATION
• SMX MATRIX CONTROL STATION
• SMM MAINTENANCE STATION
• STS SYNCH. TIME BASE
• MIS INTERSTATION COMM. MULTIPLEX
• MAS STATION ACCESS COMM. MULTIPLEX

CSNL
STS
MCX
PCM
CSND
SMX
SMT
CSED
SMA
MAS
CIRCUITS
SMC
SMC
SMC
MIS
VDU TTY
SMM
OPERATION MAINTENANCE TERMINALS
CONTROL TERMINAL
LINK TO TMN
62
HARDWARE STATIONS OF OCB-283

• CSN SUBS. ACCESS UNIT

CSNL
STS
MCX
PCM
CSND
SMX
SMT
CSED
SMA
MAS
CIRCUITS
SMC
SMC
SMC
MIS
VDU TTY
SMM
OPERATION MAINTENANCE TERMINALS
CONTROL TERMINAL
LINK TO TMN
63
HARDWARE STATIONS OF OCB-283

• CSN SUBS.ACC UNIT
• SMC MAIN CONTROL STATION

CSNL
STS
MCX
PCM
CSND
SMX
SMT
CSED
SMA
MAS
CIRCUITS
SMC
SMC
SMC
MIS
VDU TTY
SMM
OPERATION MAINTENANCE TERMINALS
CONTROL TERMINAL
LINK TO TMN
64
HARDWARE STATIONS OF OCB-283

• CSN SUBS.ACC UNIT
• SMC MAIN CONTROL STATION
• SMA AUXILIARY EQPT CONTROL STATION

CSNL
STS
MCX
PCM
CSND
SMX
SMT
CSED
SMA
MAS
CIRCUITS
SMC
SMC
SMC
MIS
VDU TTY
SMM
OPERATION MAINTENANCE TERMINALS
CONTROL TERMINAL
LINK TO TMN
65
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
STS
MCX
PCM
CSND
SMX
SMT
CSED
SMA
MAS
CIRCUITS
SMC
SMC
SMC
MIS
VDU TTY
SMM
OPERATION MAINTENANCE TERMINALS
CONTROL TERMINAL
LINK TO TMN
66
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

CSNL
STS
MCX
PCM
CSND
SMX
SMT
CSED
SMA
MAS
CIRCUITS
SMC
SMC
SMC
MIS
VDU TTY
SMM
OPERATION MAINTENANCE TERMINALS
CONTROL TERMINAL
LINK TO TMN
67
HARDWARE STATIONS OF OCB-283

• CSN SUBS.ACC UNIT
• SMC MAIN CONTROL STATION
• SMA AUXILIARY EQPT CONTROL STATION
• SMT TRUNK CONTROL STATION

CSNL
STS
MCX
PCM
CSND
SMX
SMT
CSED
SMA
MAS
CIRCUITS
SMC
SMC
SMC
MIS
VDU TTY
SMM
OPERATION MAINTENANCE TERMINALS
CONTROL TERMINAL
LINK TO TMN
68
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

CSNL
STS
MCX
PCM
CSND
SMX
SMT
CSED
SMA
MAS
CIRCUITS
SMC
SMC
SMC
MIS
VDU TTY
SMM
OPERATION MAINTENANCE TERMINALS
CONTROL TERMINAL
LINK TO TMN
69
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

CSNL
STS
MCX
PCM
CSND
SMX
SMT
CSED
SMA
MAS
CIRCUITS
SMC
SMC
SMC
MIS
VDU TTY
SMM
OPERATION MAINTENANCE TERMINALS
CONTROL TERMINAL
LINK TO TMN
70
HARDWARE STATIONS OF OCB-283

• CSN SUBS.ACC UNIT
• SMC MAIN CONTROL STATION
• SMA AUXILIARY EQPT CONTROL STATION
• SMT TRUNK CONTROL STATION
• SMX MATRIX CONTROL STATION
• SMM MAINTENANCE STATION
• STS SYNCH. TIME BASE
• MIS INTERSTATION COMM. MULTIPLEX
• MAS STATION ACCESS COMM. MULTIPLEX

CSNL
STS
MCX
PCM
CSND
SMX
SMT
CSED
SMA
MAS
CIRCUITS
SMC
SMC
SMC
MIS
VDU TTY
SMM
OPERATION MAINTENANCE TERMINALS
CONTROL TERMINAL
LINK TO TMN
71
HARDWARE STATIONS OF OCB-283

• CSN SUBS.ACC UNIT
• SMC MAIN CONTROL STATION
• SMA AUXILIARY EQPT CONTROL STATION
• SMT TRUNK CONTROL STATION
• SMX MATRIX CONTROL STATION
• SMM MAINTENANCE STATION
• STS SYNCH. TIME BASE
• MIS INTERSTATION COMM. MULTIPLEX
• MAS STATION ACCESS COMM. MULTIPLEX

CSNL
STS
MCX
PCM
CSND
SMX
SMT
CSED
SMA
MAS
CIRCUITS
SMC
SMC
SMC
MIS
VDU TTY
SMM
OPERATION MAINTENANCE TERMINALS
CONTROL TERMINAL
LINK TO TMN
72
STANDARD CONFIGURATIONS OF OCB-283COMPACT (C)
CONFIGURATION
SMC 2 SMA 2 SMT 1 SMX 1 (48
LR) SMC CAN BE LOADED WITH MR,TR,TX,MQ, GX PC
SOFTWARE SMA CAN BE LOADED WITH ETA,PUPE
SOFTWARE PERFORMANCE DATA- 5 CA/S OR 18000
BHCA
CSNL
STS
MCX
PCM
CSND
SMX
SMT
CSED
SMA
M IS
CIRCUITS
VDU TTY
SMM
OPERATION MAINTENANCE TERMINALS
CONTROL TERMINAL
LINK TO TMN
73
STANDARD CONFIGURATIONS OF OCB-283SMALL ( P)
CONFIGURATION
SMC 2 1 BACKUP SMA 2 SMT 1 SMX
1 SMC CAN BE LOADED WITH MR,TR,TX,MQ, GX PC
SOFTWARE SMA CAN BE LOADED WITH ETA,PUPE
SOFTWARE PERFORMANCE DATA- 36 CA/S
OR 1,30000 BHCA
CSNL
STS
MCX
PCM
CSND
SMX
SMT
CSED
SMA
MAS
CIRCUITS
SMC
SMC
MIS
VDU TTY
SMM
OPERATION MAINTENANCE TERMINALS
CONTROL TERMINAL
LINK TO TMN
74
STANDARD CONFIGURATIONS OF OCB-283MEDIUM (M)
CONFIGURATION
SMC 2 OR 3 MR25 SMA 2 OR MORE SMT 1
OR MORE SMX 1 OR MORE 2 SMCS 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
STS
MCX
PCM
CSND
SMX
SMT
CSED
SMA
MAS
CIRCUITS
SMC
SMC
MIS
VDU TTY
SMM
OPERATION MAINTENANCE TERMINALS
CONTROL TERMINAL
LINK TO TMN
75
STANDARD CONFIGURATIONS OF OCB-283LARGE (G)
CONFIGURATION
SMC 4 TO 7 MR2 TX2 SMC SMA 2 OR
MORE SMT 1 OR MORE SMX 1 OR MORE 2 SMC
CAN BE LOADED WITH TR,MQ,GX PC SOFTWARE SMA
CAN BE LOADED WITH ETA,PUPE SOFTWARE PERFORMANC
E DATA- 220 CA/S OR 800,000 BHCA
CSNL
STS
MCX
PCM
CSND
SMX
SMT
CSED
SMA
MAS
CIRCUITS
SMC
SMC
MIS
VDU TTY
SMM
OPERATION MAINTENANCE TERMINALS
CONTROL TERMINAL
LINK TO TMN
76
SWITCHING PRINCIPLE AND DESIGN OF OCB-283
77
SWITCHING PRINCIPLE

• 1.OCB-283 SWITCH WORKS ON SINGLE STAGE
• TIME SWITCHING PRINCIPLE

CALLING PARTYS TIME SLOT X
CALLING PARTYS TIME SLOT X
LRE (X)
LRS (X)
OUT GOING LINKS
INCOMING LINKS
Y
Y
LRE (Y)
LRS (Y)
CALLED PARTYS TIME SLOT
CALLED PARTYS TIME SLOT

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

78
INCOMING LINK CARRYING 2048 TIME SLOTS OF 64
INTERNAL LINK EACH OF 32 TIME SLOTS
SINGLE STAGE TIME SWITCH CONCEPT
X--gtY UNIDIRECTIONAL
TS2047 X TS 0
INLET
Sequential Write
0 1 X 64x32-1 2047
SPEECH BUFFER MEMORY
X
SPEECH OF X
Controlled Read
TS2047 Y TS0
OUT LET
X
CONTROL UNIT
OUTGOING LINK CARRYING 2048 TIME SLOTS OF 64
INTERNAL LINK EACH OF 32 TIME SLOTS
0 1 Y 64x32-1 2047
Controlled Write
X
CONTROL MEMORY
Sequential Read
Y
X
79
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
MLCOM
LRS Y(B)
SAB B
SWITCHING IN OCB-283 IN TWO BRANCHES OF SMX
SMX-B
80
TYPICAL OCB-283 EXCHANGE
PCMS
81
GLR( A B)
GLR (A B)
0
S M X 1 B
3 4 5 6 7 8
0 1 2
CSNL
1
0 1 2 3
SMA 1
SMA 2
SMA 3
SMT
SMX 1 A
MAS 2 (A B)
SPEECH PATH IN OCB-283
SMC1
SMC2
SMC3
SMC4
SMC5
MIS A B
TOKEN RINGS MIS MAS 1 MAS 2
SMMB
SMMA
OCB-283 EXCHANGE
82
SUBSCRIBER. ACCESS
NETWORK LINK LRs (GROUP OF LRs)
CSNL
GLR 0B
SMX
GLR 1B
1 GLR 8 LRs
GLR 0A
GLR 1A
SMX
8 B
GLR B 0 1 2 3
SMT
2 B
PCM
1 B
SWITCHING MATRIX
B SWITCH
GLRA 0 1 2 3
8 A
PCM
CIRCUIT CONNECTION EQPT.
2 A
1 A
GLR OB
A SWITCH
GLR OA
AUXILIARY EQPT
SMA
SPEECH PATH IN OCB-283
83
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 LRs

84
SUBSCRIBER ACCESS IN OCB-283CSNL CSND
CONFIGURATION
CSNL
OCB-283 SWITCH
256 SUBS
CSN BASIC RACK
CNE
CNL
PCM
256 SUBS
CSN BASIC RACK
CNL
PCM
256 SUBS.
PCM
CNE
CSND
85
SUBSCRIBER ACCESS UNITS CSNL OR CSND RACKS
BASIC RACK
LR LINKS TO SMX
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
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
EXTENSION RACKS
86
SUBSCRIBER ACCESS UNITS CSNL OR CSND RACKS
LR LINKS TO SMX
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
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
CNL OR ICNE
CSN BASIC RACK
87
CSNL OR CSND SHELF NAMES BASIC RACK
POWER SUPP INTERFACE
T C R M T
TOND
TBALAM
TOND
T C R M T
INTERFACE WITH EXCHANGE
UCX1
UCX0
GTA
TBUCN
T C R M T
CNL OR ICNE
TBABM2
T C R M T
CNL OR ICNE
TBABM2
T C R M T
CNL OR ICNE
TBABM2
T C R M T
CNL OR ICNE
TBABM2
88
GLR TO SMX A
GLR TO SMX B
GLR0 1(A)
GLR 01(B)
AUX. EQPT
CONTROL LOGICS
CSN BASIC RACK FOR CSNL
T C R M T
CNL OR ICNE
SUBS. CONNECTION SHELFS
T C R M T
CNL OR ICNE
PCM
CNE
T C R M T
CNL OR ICNE
T C R M T
1 GLR 8 LRS TWO GLR/CSN
CNL OR ICNE
89
CSN HARDWARE CONFIGURATION DIGITAL
CONTROL UNIT UCN
CSND BASIC RACK
IN CASE OF CSNL TCILR
IN CASE OF CSNL TCBTL
T T R S 13 12 9 8 5 4 T T R S 15
14 11 10 7 6
T T R S 0
T T R S 1 T T R S 3
T B A L A N T B U C N
T C C O B
T B T D B
T B T D A
T C R M T
T C R M T
TOND 80 (0)
40 V
T S U R V 2
T T R S 2
T S U R V 2
T S U R V 2
T S U R V 2
TOND 80 (1)
40 V
T 5 V 1 7
T R C X
T R C X
T M Q R
T M U C 2 M
T P U C B
T C C S
T C C S
T H L R
T H L R
T R F 8 B
T R F 8 B
T F I L M B
T C R M T
T R C X
T P O S
T M L A B
T P U C B
T C C S
T C C S
T M U C 2 M
T M Q R
T R C X
T R C X
T R C X
T S U C
T 5 V 1 7
GTA
PCBS NOT USED IN CSNL
UCX0
UCX1
90
2 16 PCMS TOWARDS EXCHANGE
AUX. EQPT
CONTROL LOGICS
CSN BASIC RACK FOR CSND
T C R M T
CNL OR ICNE
SUBS. CONNECTION SHELFS
T C R M T
CNL OR ICNE
PCM
CNE
T C R M T
CNL OR ICNE
T C R M T
1 GLR 8 LRS TWO GLR/CSN
CNL OR ICNE
91
CSN EXTENSION RACK
LOCALSUBSS. CONCENTRATOR
CNL OR ICNE
REMOTE SUBS. CONN.
CNL OR ICNE
CNL OR ICNE
REMOTESUBSS. CONCENTRATOR INTERFACE
CNE
PCM
CNL OR ICNE
CNL OR ICNE
92
EXPANDED VIEW OF C N L SHELF
CNL OR ICNE
CNL OR ICNE
93
DETAILS OF CN SHELF
SUBSCRIBER CARDS 16 SUBS / CARD MAX. 16 CARDS
T A B A
T A B A
T POL
T A B A
T A B A
T C R M T
T A B A
T HLR
T HLR
T A B A
CN - DIGITAL SUBS. CONCENTRATOR MAXIMUM 256
SUBS./SHELF
94
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 LRS
• 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

95
SWITCHING MATRIX SCHEMETIC

• SINGLE STAGE TIME SWITCHING
• SWITCHING CAPACITY-2048 LRS
• 1 LR IS 32 CHANNEL PCM - 30 USED FOR VOICE

LR0 LR255
LR0 LR255 LR 2047
.T.
1
2 3 4 5 6 7 8
COM
LR 2047
96
256x256 SQUARE MATRICES
LRE 0 LRE 255
LRS 0 LRS 255
SMX 1
LR E 256 LRE 511
LRS 256 LRS 511
SMX 2
LRE 512 LRE 767
LRS 512 LRS 767
SMX 3
LRE 768 LRE 1023
LRS 768 LRS 1023
SMX 4
SWITCHING MATRIX BLOCK DIAGRAM
97
128191
063 I/L
64x64
063 O/L
256x256 SQUARE MATRIX EXPANDED VIEW
64127 O/L
64 x64 BASIC SQUARE MATRIX
128191 O/L
192255 O/L
64127
192255
98
TWO WAY SWITCHING OF TIME SLOTS OF X-gtY Y-gtX
IN SINGLE STAGE TIME SWITCH OF OCB-283
SWITCHING FROM X-Y
SWITCHING FROM Y-X
INLET
INLET
W
W
SPEECH OF X
SPEECH OF Y
R
R
Y
X
OUT LET
OUT LET
TS2047
TS0
TS2047
TS0
W
W
CONTROL MEMORY
CONTROL MEMORY
X
Y
R
R
SWITCH OF Y BASIC 64x64 SQUARE MATRIX CORRESPONDIN
G TO LRE OF X
SWITCH OF X BASIC 64x64 SQUARE
MATRIX CORRESPONDING TO LRE OF Y
99
SWITCHING RACKS OF OCB-283 (FOR 1024 LRS ) 4
SMX SWITCHES IN EACH BRANCH
B BRANCH
SMX 1
SMX 3
SMX 5
SMX 7
SMX 1
SMX 3
SMX5
SMX 7
SMX 2
SMX 4
SMX6
SMX 8
SMX 1 (EX)
SMX2 (EX)
SMX 5 (EX)
SMX 7 (EX)
SMX 2 (EX)
SMX 4 (EX)
SMX 6 (EX)
SMX 8 (EX)
A BRANCH
100
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 LRs)
• THESE LRs -
• 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

101
SMA AUXILIARY EQPT. STATION IN OCB-283
SMC
SMC
SMA SHELF
SMC
SMA
SMA
102
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 SMTs
• SMT 1G CAN CATER TO 32 PCMS
• SMT 2G CAN CATER TO 128 PCMS

SMC
SMT(A)
PCM TERMINATIOON
SMT(B)
103
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 PCBs
• THERE ARE TWO PCBs - ICMPN2 -gtRAM VOLATILE
  MEMORY ICSMP -gtEPROM SAVES
  VOICE-ANN. ( DIGITAL )
• THESE TWO CARDS ARE SITUATED IN SMM RACK THE
  ANNOUNCEMENTS ARE CARRIED BY ONE PCM LINK FROM
  ICMPN 2 CONNECTED TO ONE SMT FROM SMT LINK GOES
  AS LR LINK TO SMX WHERE ITS TIME SLOTS ARE USED
  FOR GETTING THE RESPECTIVE ANNOUNCEMENTS.

LR LINKS
SMM RACK
SMT RACK
SMX RACK
SMT
PCM
SMT
PCM
DDF
104
CONTROL STATIONS OF OCB-283
GLR( A B)
GLR (A B)
0
S M
3 4
0 1
CSNL
1
0 1 2 3
MAIN MULTI PROCESSOR CONTROL STATIONS SMC
PCMS
SMT
SMC1
SMC2
SMC3
SMC4
SMC5
MIS A B
TOKEN RINGS MIS MAS 1 MAS 2
SMMB
SMMA
OCB-283 DIAGRAM
OCB-283 EXCHANGE
OCB-283 BLOCK DIAGRAM
105
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
106
MAINTENANCE STATIONS OF OCB-283
GLR( A B)
GLR (A B)
0
S M X 1 B
3 4 5 6 7 8
0 1 2
CSNL
1
0 1 2 3
SMA 1
SMA 2
SMA 3
PCMS
SMT
SMX 1 A
MAINTENANCE STATIONS SMM AB
MAS 2 (A B)
MAS 1
SMC1
SMC2
SMC
MIS A B
SMMA
SMMB
OCB-283 BLOCK DIAGRAM
107
MAINTENANCE STAIONS SMM(A) SMM(B)

• SMM STATION IN OCB-283 PERFORMS THE OM 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

108
MAINTENANCE STAIONS SMM(A) SMM(B)

• SMM DIALOGUES WITH ALL SMCS 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

109
MAINTENANCE STAIONS SMM(A) SMM(B)

• SMM AB 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
ALARMS ANNOUNCE PERIPH
SMMB
DISK 2
110
COMMUNICATION MULTIPLEXES
GLR( A B)
GLR (A B)
0
S M X 1 B
0 1 2
3 4 5 6 7 8
CSNL
1
PCMS
0 1 2 3
SMA 1
SMA 2
SMA 3
SMT
SMX 1 A
MAS 2 (A B)
MAS
MAS 1 (A B)
SMC1
SMC2
SMC3
SMC4
SMC5
MIS A B
MIS
TOKEN RINGS MIS MAS 1 MAS 2
SMMB
SMMA
OCB-283 DIAGRAM
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
111
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 SMCs
• SWITCHING STATIONS AND ALL SMCs
• MIS TOKEN RING - INTERSTATION MULTIPLEX, IT IS
  BETWEEN ALL SMCs 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)

112
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
113
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 OM
• IT SHOWS THE GENERAL DISPLAY OF ALARMS IN
  EXCHANGE
• IT PROVIDES ASSISTANCE IN MAN-MACHINE COMMANDS
  IN TIINTELLIGENT MODE

MIS
SMM
CONTROL TERMINAL
PGS/TI
114
CONTROL TERMINALS
MIS

• CONTROL TERMINASL
• THESE ARE SYSTEM VIDEO TERMINALS CONNECTED TO
  SMM
• THESE ARE USED FOR MANUAL RESTART STOPPING OF
  SMM
• THESE INTERACT DIRECTLY WITH REAL TIME OPERATING
  SYSTEM OF SMM COMPUTER

SMM
CONTROL TERMINAL
115
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
116
MAINTENANCE COMMANDS HARDWARE EQUIPMENTS STATUS
INTERROGATION
_at_ ESMIN _at_ AMSMX OR AMSMXn OR AMSMXAn OR
AMSMXBn
_at_ TELIN _at_ AFUR1lt63
_at_ ESMIN _at_AMSMA OR AMSMAx
GLR A B
GLR A B
_at_ ESMIN _at_ AMSMT OR _at_ AMSMTx OR _at_
AMSMTAx OR AMSMTBx
0
S M X 1 B
3 4 5 6 7 8
0 1 2
CSNL
1
0 1 2 3
SMA 1
SMA 2
SMA 3
SMT
SMX 1 A
MAS 2 (A B)
_at_ AMXIL _at_ AMXMIS OR AMXMAS OR AMX MISA OR
AMXMISB OR AMXMASAn OR AMXMASBn
MAS 1 (A B)
_at_ ESMIN _at_ AMSMC OR _at_ AMSMCx OR _at_ OR
SMC1
SMC2
SMC3
SMC4
SMC5
MIS A B
TOKEN RINGS MIS MAS 1 MAS 2
SMMB
OCB-283 DIAGRAM
SMMA
_at_ AMSMM OR SMMA OR SMMB
117
ADDRESSING OF GLR s WITH RESPECT TO CONNECTION
UNITS WRT TO SMX IN OCB-283 SOFTWARE
AFGRUUR-GLR
AFGRXSMX-GLR
CSNn AFURn
AFGRUn-0
AFGRX1-2
0 1 2 3 31
AFGRX1-3
AFGRUn-1
AFGRX1-15
SMX1 ( A B)
AFGRX1-29
AFGRASMA-GLR
AFGRX2-8
AFGRX2-11
SMX2 ( A B)
SMAn AMSMAn
AFGRAn-0
AFGRX3-3
SMX3 ( A B)
AFGRT SMT-GLR
AFGRTn-0
SMTn AMSMTn
PCM
AFGRTn-1
AFGRTn-2
SMX8 ( A B)
AFGRTn-3
CONNECTION OF LRs IN THE FORM OF GROUP OF LRs-gt
GLR TO SWITCHING MATRIX STATION SMX
118
OCB-283 SWITCHING SUBSYSTEM PROTECTION OF
CONNECTIONS IN SPEECH PATH 1. CHECKING OF
CONNECTIONS THERE ARE TWO TYPES OF CHECKS
- PERMANENT CHECK -gt -gtALWAYS
ACTIVE FOR ALL CHANNELS - CHECK ON REQUEST
-gt -gt ACTIVATED ON DEMAND CONCERNS TO ONLY
LIMITED CHANNELS METHODS OF CHECKING CHECK
BY TRANSMISSION CHECK COMPARISON OF IN
EACH BRANCH BRANCHES SEPARATELY SIMPLE
SOPHISTICATED MEANS- PARITY PARITY CRC
TYPE - PERMANENT PERMANENT ON REQUEST
119
SWITCHING IN OCB-283 DEFINITION OF ADDITIONAL
BITS IN SAB FUNCTION
ADDITIONAL BITS
SMX
8 SPEECH BITS
8 SP
8 ADD
SAB
TSi
TSi
3.9 mics
3.9 mics
LAE
LRE AB
LAS CONNECTION UNIT
LRS AB
0 1 2 3 4
5 6 7
8 SPEECH BITS
8 9 10 11 12 13 14 15
ADDITIONAL 8 BITS
MODES OF OPERATION
PERMANENT MODE MULTIFRAME MODE BIT 13 0 BIT
131 (SYNC WORD) BIT 140 (HOMOLOGOUS RESULT BIT
14CONTROL BIT OF LRS AB TSi ON LRE-TSi IF
NOT,1) BIT 15 PARITY BIT 15 CRC BIT
120
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 Suit