BHEL TRAINING

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THIS IS MY TRAINING PRESENTATION

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BHEL TRAINING

  1. 1. SUBMITTED BY:MANISH KUMAR PANDEY ROLL NO.- 1003331054 ECE 7TH SEM
  2. 2. CONTENT  INTRODUCTION OF BHEL HARIDWAR  TELECOMMUNICATION  ELECTRONIC EXCHANGE  CARDS USED IN EXCHANGE  FREQUENCY USED IN TELEPHONY  VOLTAGE USED IN TELEOHONES LINES  TELEPHONE LINE IN BHEL  MAKING A TELEPHONE CALL  TYPES OF CONNECTIONS IN TELECOMMUNICATION  CONCLUSION
  3. 3. INTRODUCTION TO BHEL  BHEL is one of the Maharatna company and is only PSU among 12 Indian companies to figure in Fobes Fabulous of 50 list.  BHEL Haridwar was established in 1965.  The areas of BHEL operations broadly cover conversion, transmission, utilization and conservation of energy in core sectors of the economy like Power, Industry and Transportation etc., and fulfill vital infrastructure needs of the country.  BHEL have 14 manufacturing divisions, 8 service divisions, 15 regional offices, 4 power sectors and more than 150 project sites in all over India.  Product of BHEL are boiler , Gas generator, hydro generator , Steam turbines, gas turbines , Hydro turbines, AC motors ,Transformers, Wind mill, Valves, etc.  The financial turnover during the year 2007-08 was 21,401 crore rupees and current in 2012-13 turnover is 1,20,000 crores rupees.
  4. 4. TELECOMMUNICATION  TELECOMMUNICATION IS A FAR COMMUNICATION PROCESS IN WHICH MODULATION OF MESSAGE IS REQUIRED.  TELECOMMUNICATION IS BASICALY COMMUNICATION DONE THROUGH TELEPHONES  TWO TYPES OF TELEPHONY COMMINICATION IS USED 1. MANUAL TELECPHONY :-OPERATOR IS REQUIREDTO ESTABLISH CONNECTION MANUALLY B/W THE DIFFERENT CALLING & CALLED SUBSCRIBERS. 2. AUTOMATIC TELEPHONY :- OPERATOR ARE NOT REQUIRED TO ESTABLISH CONNECTION MANUALLY B/W THE DIFFERENT CALLING & CALLED SUBSCRIBERS. IN THIS CALLING SUBS. ESTABLISH REQUIRED CONNECTION BY OPETRATING THE DIFFERENT SWITHS AT THE CENTRAL PLACE KNOWN AS EXCHANGE.
  5. 5. TONE USED IN TELEPHONY DIAL TONE – WHEN HANDSET IS PICKED UP FROM THE CRADLE THIS TONE HEARED IF A FREE LINE IS AVAILABLE.THIS TONE IS A CONTINUOS BURBLE SOUND OF 400Hz MODULATED BY 25 Hz. BUSY TONE - CALLED SUBSCRIBER ENGAGED WITH OTHER CALL. THIS TONE IS A CONTINUOS OF 400Hz, GENERALLY ON FOR 0.75 sec& OF FOR 0.75s. RINGING TONE - THIS TONE IS A CONTINUOS BURBLE SOUND OF 400Hz MODULATED BY 25 Hz. NUMBER UNOBTAINED TONE- DIALED NUMBER CONNECTION NOT PRESENT IN EXCHANGE
  6. 6. ELECTRONIC EXCHANGE
  7. 7. MDF RACK R-0 SLOTS [0 TO 27] R-1 R-0 RACK R-1 S.I.E.T. GANGOH 7
  8. 8. CARDS USED IN EXCHANGE 1. 2. 3. 4. 5. 6. 7. 8. Z-24 :- ANALOG CARD UA-32 :- DIGITAL CARD NDDI :- JUNCTION CARD ATR-2 :- DIT CARD CPU-3 :- CONTROL PROCESSING UNIT INTOF :- INTERFACE CARD MMSFD :- FLOPPY DRIVE USED BY OWNER SUVG :- VOICE CARD (LIKE- NUMBER IS BUSY TRY AFTER SOME TIME) 9. IDTL-8 :- LOOP DIALING 10.PCM-2 :- DIGITAL TRUNK CARD USED THROUGH OPTICAL FIBER CABLE 11.GPA-1 :- CONFERENCE CARD
  9. 9. FREQUENCY USED IN TELEPHONY IN TELEPHONE DIALING TWO TYPES OF FREQUENCIES ARE USED 1. HIGH BAND FREQUENCY:• RANGE OF FREUENCY IS 1216 Hz TO 1245 Hz • NUMBER FROM 6 TO 9 AND 0 FALL UNDER THIS BAND 2. LOW BAND FREQUENCY • RANGE OF FREQUENCY IS 701Hz TO 936 Hz • NUMBER FROM 1 TO 5 FALL UNDER THIS BAND
  10. 10. VOLTAGE USED IN TELEPHONE LINE  40 TO 60 VOLT DC ALWAYS REMAIN IN NORMAL TELEPHONE LINE  9 TO 12 VOLT WHEN HANDSET IS PICKED UP  75 TO 110 VOLT DC AT THE INSTANT OF RINGING SIGNAL
  11. 11. TELEPHONE LINES IN BHEL THREE TYPES OF TELEPHONE LINE 1. MAX LINE - FOR INTERNAL COMMUNICATION LINK IN BHEL 2. PABX - USED FOR BOTH INTERNAL & EXTERNAL COMMUNICATION LINK IN BHEL 3. DOT LINE - THESE LINE ARE DIRECT TELEPHONE LINE
  12. 12. HOW TELEPHONE CALL IS MADE 1. PICK UP HANDSET &DIAL TONE IS HEARED 2. DIAL A NO. 3. CHECKING OF CALLED SUBSCRIBER LINE WHETHER IT IS FREE OR NOT 4. IF LINE IS FREE THEN RINGING PULSE IS SEND TO THE CALLED PARTY 5. WHEN CALLING PARTY PICKS UP THE HANDSET THE BILLING METER BECOMES ACTIVE
  13. 13. TYPES OF CONNECTION TWO TYPES OF CONNECTION MADE IN TELECOMMUNICATION 1. With wire or cables connection:- These are also two types a). Under ground cables :- These types of cables run under the earth and are basically used to connect the exchange to the subscriber's Distribution Box . b). Over head cables:- These types of cables are used to connect the equipment inside the exchange and to connect the peripheral devices to the subscriber's Distribution Box. 2. Wireless Microwave Links through satellite :- wireless microwave communication is use for long distance communication or where cable communication is not possible like in sea.
  14. 14. OPTICAL FIBER SYSTEM  For long distance data transmission optical fiber cable is used.  Long distance data transmission in electrical cables suffers from ground loop problems. The merits of the optical fiber stem from the fact that the basic material used in their construction is nonmetallic and electrically non conductive.  Fiber cables are about the thickness of a human hair and thin dimension results in a low weight for given length when compared to electrical cables.  Losses through optical fiber are also low . For single mode fiber losses is about 0.4 DB per km and for multi mode fiber 3 DB per km for wavelength 850 nm. So optical fiber is widely used in telecommunication.
  15. 15. CONCLUSION Telecommunication makes life easy. It connect people in few seconds and information is sent in few minutes. It enhances collaboration and communication among individuals both inside and outside an organization and there are many example use of telecommunication in everyday life and is a necessary part of life nowadays. TELECOMMUNICATION is plays a vital role. In India ,there has been unprecedented growth in last ten year and still growing. Hence telecommunication is playing a big role in development of India.

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