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Shubham Kumar Dangi Electronics & Telecom. KIIT University Prepared by PROJECT REPORT ON OFC BASED CONTROL COMMUNICATION

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Page 1: Shubham dnr railway

Shubham Kumar DangiElectronics & Telecom.KIIT University

Prepared by

PROJECT REPORT ON OFC BASED CONTROL COMMUNICATION

Page 2: Shubham dnr railway

• 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

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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.

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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?

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BASIC OFC LINK

InputSignal

Coder orConverter

LightSource

Source-to-FiberInterface

Fiber-to-lightInterface

LightDetector

Amplifier/ShaperDecoder

Output

Fiber-optic Cable

Transmitter

Receiver

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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)

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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

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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.

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MUX

E/OCONVERTER

O/ECONVERTER

MUX

OFC

SOURCE DESTINATION

MEDIA

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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

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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

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• 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

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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.

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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

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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

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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.

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• 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:-

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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.

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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

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TYPES OF OFC CONNECTOR

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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

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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.

Page 23: Shubham dnr railway

THANK YOU