shubham dnr railway
TRANSCRIPT
Shubham Kumar DangiElectronics & Telecom.KIIT University
Prepared by
PROJECT REPORT ON OFC BASED CONTROL COMMUNICATION
• I would like to say thanks to our Respected S.P.T. & course director who took special interest in the project allotment and guidance.
• I also take this opportunity to thanks Mr.Ravi KUMAR(SSE/OFC/DNR) for their valuable guidelines & suggestions.
ACKNOWLEDGEMENT
OBJECTIVE This Project gives general idea about the OFC BASED CONTROL
communication system working in DANAPUR DIVISION of EAST CENTRAL RAILWAY Focused on Equipment and type of communication on OFC .
It describes the OFC distribution at Headquarter .
It gives the general requirements of optical fiber communication system.
It describes about OFC equipment's, connectivity, connectors, channel dropping and power supply arrangement, failure and their diagnosis.
Optical fiber comm. Means information is sent in the form of light
beam from one end to another end.
In this system a no. of channels are multiplexed and electrical
information is converted into light beam and transmitted into the
media to reach the other end.
At another end light beam is converted into electrical signal and
individual channels are obtained after demultiplexing process.
What is optical fiber communication?
BASIC OFC LINK
InputSignal
Coder orConverter
LightSource
Source-to-FiberInterface
Fiber-to-lightInterface
LightDetector
Amplifier/ShaperDecoder
Output
Fiber-optic Cable
Transmitter
Receiver
Types of Fiber Available1. MM Step Index fiber :- core & cladding have abruptly distributed
index. 2. MM Graded Index fiber:- Have refractive index varies gradually 3.Single mode fiber:-Have very low core dia (8.3 micro meter)
SPECIAL FEATURE :-
More information carrying capacity (up to 20 Tbps possible ) Immunity to electromagnetic & radio frequency interference
Low attenuation : 0.25 db/km at 1550 nm and 0.35 db/km at
1310 nm per channel Installation cost high but after installation maintenance cost is
low. OFC Cable has less weight No thief value Easily transported
OPTIC FIBRE APPLICATIONS IN RAILWAYS
• Long haul circuits for administrative branch and data transmission circuits (PRS,FOIS etc.,)
• Short haul circuits for linking of telephone exchanges.• Control communications• Signaling application for fail safe transmission.• Various circuits like speech and data.• Electronic interlocking systems installation.
MUX
E/OCONVERTER
O/ECONVERTER
MUX
OFC
SOURCE DESTINATION
MEDIA
OFC EQUIPMENTS USED:-
1. STM
2. MUX
3. CONNECTOR
4. OTDR
5. POWER METER (Source)
6. OPTICAL FIBER TERMINATION BOX
7. OPTICAL FIBER SPLICER & TOOL KIT
8. RETURN LOSS MEASURING UNITS
9. 2MB TESTER
SYSTEM AT A GLANCE MUGHALSARAI – MANPUR SECTION
STM-1
DDF
MUX PORT BPORT A
OPTICAL SIGNAL
OPTICAL SIGNAL
MDF
PORT 1 PORT 2
30 Nos. ANLOG CHANNELS
E1s 21Nos.
Synchronous transport module
Digital distribution frame
Multiplexer
Main distribution frame
Control phone
• S T M S T M
PD MUX PD MUX
DTMFDECODER
UNIT
MDF
U LINK PANEL
VF CHANNEL
Control communication on OFC network
CONTROL OFFICE WAY STATION
OFC
CONTROL PHONE
“B” PORT
(E-1)“A” PORT
(E-1)
“B” PORT
(E-1)“A” PORT
(E-1)
TEST ROOM
MDF
KRONE100 Pair PIJF
DTMF ENCODER UNIT
And one DTMF encoder connection given to Section Controller
Way side station
Control circuits working on wired media
OFC 6/4 quad cablea. Sec. Control a. EC control b. Dy. Control b. LC Gate telephone. c. Traction power control c. Block circuits d. Remote controle. Engg. Controlf. S&T Control
Control communication is provided on OFC with normal arrangement by Providing STM-1 and PD-MUX equipment at every station.
8 4
7 3
4 2
3 1
6 4
5 3
2 2
1 1
STM-4
PORT-1 PORT-2
TX
RX
TX
RX
TX TXRX RX
STM-1
4
3
2 4
1 3
4
3
2 2
1 1
TOWARDS PATNA
TOWARDS DANAPUR
FIBREDISTRIBUTION
FRAME
FIBREDISTRIBUTION
FRAME
CONNECTION OF PATCH CORD WITH PIGTELSTATION-1 WITH STM-4 STATION-2 WITHOUT STM-4
PORT-1 PORT-2
OFC
OFC
OFC
OFC
TX TXRX RX
STM-1PORT-1 PORT-2
STM1 STM4
E1 Connectivity E1 Connectivity
E1 -WEBFIL MUX-1 MGS-DHN MTRC PROTECTION -1
E2 -18GHz RADIO MUX MGS-GAQ MGS-DHN MTRC PROTECTION -2
E3 - BD CNL MGS-SEB MGS-DHN MTRC PROTECTION -3
E5 - UTS MGS - GNK MGS-DHN MTRC PROTECTION -4
E6 - MGS-CDMR-KMS - MTRC MGS-DHN MTRC PROTECTION -5
E7 - MGS-SSM FOR TMS MGS-DHN MTRC PROTECTION -6
E8 - MGS-GYA FOR FOIS MGS-DHN MTRC PROTECTION -7
E10 - MGS-GAQ FOR UTS MGS-DHN MTRC PROTECTION -8
E11 - MGS-CDMR FOR UTS E2 -RING
E13 - KASTA-GRRU-RFJ FOR MTRC E3 -MTRC DISPATCHER
E14 - SEB-PES-JHN FOR MTRC E4 - UTS
E15 - SSM-SSG-KTQ FOR MTRC E6 -WEBFILMUX
E16 -- PSE-MTGE-DGO FOR MTRC E12 - SEB - GHD WEBFILMUX
E17 -- MGS-SYJ-BBU-PHE FOR MTRC E13 - MGS-ARA- BKJ WEBFILMUX
E18 -- MGS-AUBR-IMGE-MPO FOR MTRC E15 - RAILNET MGS-GYA
E16 - FOIS MGS-GYA
E19 - FOIS MGS-DHN
E20 - TMS MGS-BBU
STM-1 STM-4FIBER POSITION - 1 & 2 FIBER POSITION 3 & 4
STM1AND STM4 CONNECTIVITY
OPTICAL TIME DOMAIN REFLECTOMETER
1-OTDR is an Opto-electronic device used to measure loss & length of fiber 2-OTDR works on the principle of back SCATTERING of light.3-OTDR transmits a light beam in faulty fiber. where fiber cut or make or connector loss is present in fiber. Light is back scattered and sensor senses the scattered power with respect to time and shows the result.
• Problems occurs in OFC media.• 2Mbps stream level may be broken. Then Rx fail will be
displayed on tributary card for Webfil mux• Loose connection on DDF module• TET Card faulty in case of heavy lightening• OFC cut.• High loss on OFC in case dusty fiber• Earth fault.• Laser weak(trans level)
GENERAL FAILURES:-
DIAGNOSIS
• The OFC link failure can be overcome by providing protection path.
• Avoid loose connections.• Surge protection should be provided.• Losses due to attenuation and dust should be avoided.• Make sure that pigtail must be cleaned with isopropyl alcohol
to eliminate losses.• Proper connection of Rx & Tx must be made.
TELECOM FAILURE ON OFC SYSTEM FOR THE MONTH OF FEB.13 TO OCT.13.
Sl.No. Month Date Stn. Between GEAR TOF TOR Total time
Nature of failure
Action taken
1 mar-13 09.03.13 SEB-MPO SEC 14:00 14:05 00:05 Intermitent Ring Out
OFC link cut from KMGE and CNL put in Patching.
2 apr-13 21.04.13 KTQ-MPO SEC 15:00 16:30 01:30 NRNS OFC cable cut between PSE-KTQ & ARA PNBE, Patching not work.
3 may-13 07.05.13 GYA(W) SEC 04:20 06:50 02:30 NRNS At GYA(W) OFC MUX of NIM & Voice cards Replaced.
4 jun-13 14.06.13 BGKH SEC 20:50 22:00 01:10 NRNS At BGKH OFC MUX of Voice cards Replaced.
5 Jul-13 03.07.12 BGKH SEC 10:40 22:20 11:40 NRNS At BGKH OFC MUX of NIM,Voice cards & Mother Board Replaced.
6 Aug-13 23.08.13 MGS-DOS SEC 05:25 05:55 00:30 NRNS At MGS OFC MUX of NIM & PSU card Replaced.
7 Oct-13 04.10.13 PHE SEC 09:05 13:30 04:25 NRNS At PHE ASM Room of ELEC. Wiring short circuit and OFC MUX Burnt out. & Replaced.
9 Oct-13 19.10.13 GAQ SEC 12:10 14:30 02:20 NRNS At GAQ Telephone Tx line changed MW to Stn. And normal.
TELECOM FAILURE ON OFC SYSTEM
TYPES OF OFC CONNECTOR
DC POWER SUPPLY ARRENGMENT OF OFC SYSTEM
Stab.1KVA
CHA15//25AMP
BATTERYBANK
48V/200AH
MCBSPIKEBUSTER
AC230
STM1STM4
&FLEXIMUX
ELET. EARTH
EQUPT. EARTH
+-
+-
- +
-+ARA Terminal
32A
CONCLUSIONAs we know the optical fiber communication is the backbone of railway network and by this we can transmit the more and more channel with fast speed but during this project it is found that it is not possible to tap OFC at emergency control LC gate and for maintenance very skilled staff is required.
THANK YOU