Download - ISDN exchange.ppt
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What is ISDN
An ISDN is a network that provides end to end digital
connectivity to support a wide range of services
including voice and non voice services to which users
have access by a limited set of standard ,
multipurpose user network interfaces. In ISDN all the
three services (voice, data, image) are transmitted
simultaneously on a single pair of wires. Network is a communication carrying system
including media, switching points and proper routing.
Networks fallow certain protocols for transmission.
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CORAL FLEXICOM 6000:
Technology : Tadiran Business System
ISRAEL
Type: ISDN (Integrated Service Digital
Network 6000 ports
Dual Control System with hot Stand by
Pentium III Processor
32 GC Group Controller-4096 Time slots
Diagnostic software runs constantly
Alerts the maintenance personnel on failuresthrough Alarm.
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SYSTEM SPECIFICATION
Common Control Sets :02
Group Controller :32GC
No of Peripheral Shelves : 16(8 odd+8
even)
No. of Ports (Trunks + stns) :6000No of Ports in use at a time/system :4000
No. of Ports in use at a time/shelf : 512
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DESCRIPTION OF PROJECT
CORAL FLEXICOM 6000
CONSTRUCTION: -
Coral Flexicom 6000 is consists of one maincabinet, which houses the Coral Flexicom6000 control shelf and two or three peripheralshelves.
A maximum of three expansion cabinets,consisting of only peripheral shelves made isconnected to main cabinet.
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COMMON CONTROL SHELF
control shelf is located at bottom of main cabinet and
houses all the control cards .
MCPATS ( MAIN PROCESSOR CARD )
32 GC ( CONTROL CARD )
PSATS ( POWER SUPPLY CARD )
The Coral Flexicom 6000 stand by Dual Control
includes two set of Control Hardware ,and each is
able to fully and independently control the operationof entire function.
Switching matrix and User database is stored in
battery protected SRAM on both the Control Card.
Operating software is stored on CFDC (Compact
Flash Memory ) on both the control card sets.
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All the system generated data is stored in Active ControlSet.
Mirrored memory snoop: Memory in Active Control Set isduplicated in stand by control set.
This Technique is responsible for Unnoticed Change overfrom Active to stand by.
When Control Set Fails, an alarm is given to themaintenance Console and changeover takes place to standbycontrol set. Calls are not interrupted.
Common Control of Coral System provides the control
mechanism for establishing Audio and Data Connection orcalls via PCM BUS between Peripherals I/O ports in thesystem.
Each standard Common Control Card set includes a MCP-
ATS ,32 GC and Power Supply Card (PS-ATS)
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PERIPHERAL SHELF:
Power Supply unit slot:
It contains Peripheral Power Supply Card (PPS) and RingerPower Supply Card (RPS).
Peripheral Shelf slot:-
The Peripheral shelf Contains 18 Card slots designated 1 to18.
CARD SLOT May Contain Card type
Slot 1 PB-ATS Only
Slot 2 PB-ATS Only
Slot 3 to 18 Any shared ServiceCard or any Peripheral Interface card.
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PERIPHERAL CARDS
Service Card/ PB-ATS Card-
Peripheral buffer Card (PB-ATS) IS USED TOMATCH HIGH SPEED Data to universal cards and
MCP-ATS Card. It gives information Data for 32 GCto all selves .
. 32 GC Communicates via MPG-ATS and PB-ATS .
i.e
32GC---------MPG-ATS-----PBD-ATS----PB-ATS--------Peripheral Cards.
. Take slot 1 &2 in even numbered shelves.
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Universal Cards 24 SLSSingle line Station
supports 24 circuits of analog Telephone 24 SFT : Station Flexi set Terminal
supports 24 circuits of Digital Telephone
24 SDT :24 port Station Digital Phone with Display Unit. It isadvance version of 24 SFT .It support DKT and DST ServiceTelephones
4 TEM :- Trunk E & M
Supports 4 circuits of E & M STDs.
4 TWL :- Two Way Tie Line Card.
To tie up two exchange on single pain 30 T :- Trunk E1
Support 30 circuits of E1s
30 PRI :- Trunk PRI
support 30 circuits of PRI (PRIMARY Rate Interface ),2.048mbps .It can send Voice, Image and Data.
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8DTR-DTMF Receiver/Decoder
Supports 8 circuits of DTMF Transreceivers
4VSN- Voice Announcement Support s 4circuit of Pre recorded announcement26X28sand 2X55s.
8 DID-Direct inward DialingSupports 8 circuits of direct inward dialing.Ex-BSNL to RLY exchange.
8 TBR-Trunk BRISupports 8 circuits of BRI (Basic RateInterface), 144kbps
8 T.C-Trunk CO Line
Supports 8 Circuits of TWT (Two WayTrunk).
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. CNF- Conference
Supports 2 circuits of 15 Party and 8 circuits of 3 partyconference.
. IDSP-Integrated Digital Signal Processor
Supports 64 circuits of caller ID functions.
. MFR- Multi frequency Receiver
Supports 16 circuits of DTMF receivers for signaling from
trunk.DRCM CARD
This card use to perform different function with the help ofcom 1 connected through RS 232 connector. DDTR orDTMF Dialing
RRemote Maintenance
CConference 3 Way
MMODEM
. FLSI:- Connected at Remote Location Unit (SLAVE)
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(b) Ringer Power Supply Card (RPS):-
The Ringer Power Supply Card (RPS) provides ahigh voltage generator current required by single lineTelephone Station Ports of 24 SLS. RPS operates froma nominal input of -48v DC.
The RPS contains a low frequency oscillator and poweramplifier ,which convert the -48v DC input power to75v, 85v and 105v AC (16,20and 25HZ) for use as aRinging and message waiting Signal.
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EXCHANGE INSTALLED AT
HUBLI , S W RAILWAY
DATE OF INSTALLATION : 01 JULY 03
INSTALLED BY :CROMPTON GREAVES/BANGALORE
CORAL /ATS: Advance Telephony
Server
32 G C : Group Controller 4096 TS
CPU : P-3 Standard Motorola
ISDN : Integrated service
digital network exchange CABINET : 1 Main Cabinet + 2
Expansion Cabinet
TOTAL SHELF : 11 SHELVES
EACH SHELF :16* 24=384 Ports
MAXIMUM CAPACITY :11*384=4224 Ports
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PORT CONFIGURATION
Ringer power supply card :- 1 per shelf
Peripheral power supply card :- 1 per shelf
Peripheral buffer (PB-ATS) Card :- 7
MCP-ATS : 2
32 GC : 2
PS-ATS : 2
4 VSN Card : 2
MRF CARD : 1 CNF CARD : 1
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8 DRCM : 1
8DTR/S : 5
4TEM/S : 4*4=16
PRI
30 : 5X30=150
30T : 13X30=390
4TWL : 8X4=32
24SLS : 86X24=2064
24 SFT : 2X24=48
Approx 3500 ports are in use.
DID (Dial Inward Dialing) facilities are available on allRailway Number.
From BSNL by Dialing special Code (22)before RailwayNumber .We can make a Call on Railway number
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CONNECTIVITY OF DIFFERENT
CITIES , HQ EXCH, ZONAL HQ
EXCH & CORE :
Hubli Main Exchange is connected to all 3
Division of SWR.
This Exchange Connected with other
exchanges installed in important stations of
Hubli divn with PRI 30 cards.
Hubli main exchange is also connected with
main exchanges of other zones with PRI 30
cards.
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HUBLI DIVISION CONNECTIVITY DIAGRAM
HUBLI MAIN
ISDN Flexicom 6000
6000 PORTS
EXCHANGE
BGM
384
PORTS
ISDN
CORAL
BJP384
Ports
ISDN
CORAL
GDG
ISDN
CORAL
BAY
ISDN
CORA
HPT
ISDN
CORAL
GSD
SIEMENS
ISDN
EMD
ISDN
CORAL
WLL
EXCH
AT
CRL
LD
384
ports
VSG
ISDN
CORAL
DWRL
ISDN
CORAL
SVM
ISDN
CORAL
CLR
ISDN
ports
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HUBLI DIVISION TAX CONNECTIVITY DIAGRAM
HUBLI MAIN TAX
ISDN Flexicom 6000
6000 PORTS
EXCHANGE
SBC
ISDN
CORAL
KOLKATA
ISDN
CORAL
MAS
ISDN
CORAL
TAX
MYS
ISDN
CORAL
CSTM
ISDN
CORAL
GTL
ISDN
EXCH
SC
ISDN
CORAL
ISDN
Exchange
at
Delhi
HUBLI MAIN EXCH
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HUBLIEXCHANGE
CORAL
FLEXI
6000
I D F
MDF
D y. Construction
office
R l y.
Officercolony
DRM
Office
Harsha
complex
Carriage
workshop
GM
OFFICE
Railway
Station
Central
hospital
DRM
Residence
Connectivity diagram UBL Exchange
20 pair
20 pair
20 pair 100
pair 100
pair
100
pair
100
pair
100
pair
50
pair
FEATURES OF CORAL
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FEATURES OF CORAL
EXCHANGE
Video Conferencing
Rotary Dial Calling
Touch Tone Calling
Station to Station Dialling Direct Outward Dialling (DOD)
Direct Inward Dialling (DID)
Operator Assisted I/c/ O/G connection
Operator Call International Direct Dialling (IDD).
Discriminative Ringing
Immediate Ringing
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Number group Line lock out
Class of service
First party release
Hot line
Off premises station
Tenant- master telephone
Maintenance telephone
Abbreviated Diabbereviated dialling
Call Forwarding Variable
Direct Call Pick-up
Master Number Hunting
Attendant Call Transfer (all-calls)
Night Transfer
Long Time Recording
Caller Line Identification Presentation (CLIP)
Caller Line Identification Restriction (CLIR)
Terminal Portability (TP)
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MAJOR FAULTS AND TROUBLE
SHOOTING
POWER PLANT FAILURE
CONTROL CARDS FAILURE
FREQUENTLY COMING FAULTS
OFC CUT
OFC STRESS
CONNECTOR DUSTY
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TROUBLESHOOTING
LOCALIZATION OF FAULT :
Fault can be localized by moving step by step starting from
field side to equipment side
1. Check the instrument if any problem is with connectors RJ
11, RJ 8 or if instrument is faulty by replacing with workinginstrument .
2. Check the voltage at IDF as it should be 48 v. If
this is ok then problem may be in between IDF and
instrument. Check for continuity test of cable.3. If their is no voltage at IDF then check voltage at
MDF, it should be 48 v. If it is ok then recrone the
jumper cable at IDF. If their is no voltage at MDF
then the problem is on equipment side.
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POWER SUPPLY
Normal required voltage is -48v DC.
System can work in range of -42v to-63v DC.current- 3A Per shelf or 12A Per cabinet
This exchange requires 40A current.
There are 2 battery bank of 48 volt dc and they are
manually changed over after every 12 Hrs.
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Maintenance
The Coral Flexi Com 5000 is a maintenance free system.
It requires proper cooling and dusting for uninterruptedtelecommunications service.
Check the battery voltage and charger output voltage
Cleaning of equipment rooms with vacuum cleaner Testing of all the trunk circuit
Alarm checking
Check the room temperature
Check working of lights, air condition
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Maintenance Cont.
Check wiring and connecting terminals of power supply
arrangement
Earthing connection of all equipment and earth electrode
Cable termination, MDF and IDF to be cleaned and checked
Transmission loss test of all trunk circuit
Functional testing of attendant console
Office data back up to be updated.
Earth resistance value measurement Line loop resistance and insulation testing
Testing of spare cards
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While preparing this project report I observed
that Coral Flexi Com is a maintenance free
electronic exchange. It provides a continuous telecommunication
service.
Only we have to maintain its power plant.
MAINTENANCE
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CONCLUSION
In south western railway , Coral Flexicom exchangesare fast replacing the older exchanges like Siemensomni, CDOT etc. The Coral exchange can be usedin three ways.
It is used as main Exchange (CORAL FLEXICOM6000)
It can be used as Remote Location Unit (RLU)
It is used as intercom (coral flexi 400). In intercominstead of FLMM or FLSI Card, MEX and HDC cardis employed.
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CONCLUSION
ISDN Coral Flexicom6000 ports Exchange provides manyfeatures and utilities. This Exchange is very quickly replacingCDOT Exchange, OKI Exchange, Siemens Omni, etc. It is
proving to be a boon to Indian Railways because of its
flexibility. By implementing this Exchange, Indian Railwayhas successfully achieved its goal of faster accessibility, withits subscribers and quicker connectivity between thesubscribers. This system is mostly hasslefree and does notrequire elaborate maintenance, thereby proving to beeconomical
I hope every Zone and every Division in Indian Railwayincorporates this Exchange to ensure faster growth anddevelopment.
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