Transcript bsnl-report-slide-sh.. - Engineering Mini Projects

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
OPERATION
AND
MAINTENANCE
PABX
MAGTAPE
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
SUBSCRIBER
ACCESS
SYSTEM
CONNECTION
AND
CONTROL
TELEPHONE
NETWORK
DATA
NETWORK
VALUE
ADDED NETWORK
DISK
PABX
MAGTAPE
OPERATION
AND
MAINTENANCE
O&M
NETWORK
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
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
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
PU
PE
ETA
URM
CKTS
SMA
COMMUNICATION MULTIPLEX
TMN
OM
MQ
GX
MR
TX
TR
PC
SUBSCRIBER ACCESS
SUBSYSTEM
CSNL
LR (4MB /
CSND
S)
2 MB/S
PCM
SMX
DT
BT
MCX
LR
SMT
LR
COM
PU
PE
ETA
URM
CKTS
SMA
COMMUNICATION MULTIPLEX
TMN
OM
MQ
GX
MR
TX
TR
PC
CONNECTION
SUBSYSTEM
CSNL
LR (4MB /
CSND
S)
2 MB/S
PCM
SMX
DT
BT
MCX
LR
SMT
LR
COM
PU
PE
ETA
URM
CKTS
SMA
COMMUNICATION MULTIPLEX
TMN
OM
MQ
GX
MR
TX
TR
PC
OCB-283 FUNCTIONAL
DIAGRAM
CSNL
LR (4MB /
CSND
S)
2 MB/S
PCM
SMX
DT
BT
MCX
CONTROL
LR
SMT
COM
SUBSYSTEM
URM
LR
PU
PE
ETA
CKTS
SMA
COMMUNICATION MULTIPLEX
TMN
OM
MQ
GX
MR
TX
TR
PC
OCB-283 FUNCTIONAL
DIAGRAM
CSNL
LR (4MB /
CSND
S)
2 MB/S
PCM
SMX
DT
BT
MCX
LR
LR
O&M
SMT
URM
SUBSYSTEM
CKTS
COM
PU
PE
ETA
SMA
COMMUNICATION MULTIPLEX
TMN
OM
MQ
GX
MR
TX
TR
PC
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 ..OVER MIS
• TR PROVIDES CALLING SUB’S COS DATA 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
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
CSNL
SC
‘B’
TR
MR
MQ
RGF
SC
SC
GX
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.)
• ETA SENDS IT TO MR ON MAS
• DIAL TONE IS CUT OFF ON ORDERS OF MR
‘A’
CSNL
CSND
SC
MCX
VC
UR
M
COM
CKT
S
MAS
TX
CSNL
SC
‘B’
TR
MR
MQ
RGF
SC
SC
GX
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
VC
UR
M
COM
CKT
S
MAS
TX
CSNL
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
B
VC
UR
M
COM
CKT
S
MAS
TX
CSNL
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
VC-B
VC-A
UR
M
COM
CKT
S
MAS
TX
TR
MR
CSNL
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
VC-B
VC-A
UR
M
COM
CKT
S
MAS
TX
TR
MR
CSNL
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
VC-B
VC-A
UR
M
COM
CKT
S
MAS
TX
TR
MR
CSNL
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!!!