1. A PRESENTATION ON PRACTICAL TRAINING TAKEN AT BSNL, CHITTORGARH www.powerpointpresentationon.blogspot.com

2. AN INTRODUCTION TO BSNL An Autonomous Enterprises of Indian Government. Largest telecommunication Company in India and Seventh Largest in world. It provides a wide communication network which is reachable to all over country. It is equipped with the Latest technology such as:- CDMA, TDMA, GSM.

4. AREA EXCHANGE ROOM SWITCH ROOM - OFC ROOM - CARD ROOM MAIN FRAME DISTRIBUTION ROOM

5. ROOMS :- POWER ROOM Power is supplied to OFC Room, Switch room and MDF room. ENGINE ROOM

6. OPTICAL FIBRE CABLES Why we use OPTICAL FIBRE Cable ? - Size,weight and Flexibility Electrical isolation Security Low transmission loss More information carrying capacity Low cost

7. BASIC STRUCTURE

8. TYPES OF OPTICAL FIBRE CABLES:- BASED ON THE NO. OF MODES BASED ON REFRACTIV E INDEX MONO MODE MULTI MODE STEP INDEX GRADED INDEX

9. How Communication Take Place in OFC ?

10. PROCESS OF COMMUNICATION via OFC 1 2 9 8 6 4 5 7 3 Transmitter Receiver Message origin Modulator Carrier Source Message output Signal processor Detector Channel Coupler Information Channel Channel Coupler ( input ) ( output )

11. FAULTS THAT MAY OCCUR Fault in wires Fault in cards Fault in computer Fault in subscriber’s end

12. COMPONENTSA/BA/EB/E AC0.0 DC0.0 R1.00m  C3.03  F HOW TO DETECT A FAULT ? Standard Table Of Various Components

13. MULTIPLEXERS Processing of Signal by using MULTIPLEXER