Bsnl

BHARAT SANCHAR                                                                             NIGAM LIMITED

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        Reported By:-

                              GOHIL INDRAVIJAYISNH.N.
                        ELECTRONICS & COMM.
                        S – 137406033

INDEX

                                                              Page           no.

•   Acknowledgement ……………………………………………       3

•   Objectives …………………………………………………….         4

•   Introduction …………………………………………………..       5-12
      • Invention of telephone ……………………………………...
      • Over view of BSNL ………………………………………...

•   Layout of Exchange ………………………………………….     13-19

•   Types of Exchanges …………………………………………..       20-61
      •     C-dot dss…………………………………………………
            ✓ C-dot dss max ……………………………………...
            ✓ C-dot dss max –l ……………………………………
            ✓ C-dot dss max-xl……………………………………
      •     5ESS …………………………………………………….

•   Services ………………………………………………………...   62-103
      • Wire line …………………………………………………..
      • Internet …………………………………………………...
            ✓ Dial – up …………………………………………...
            ✓ Broad Band ………………………………………..
      • VOIP ……………………………………………………...
      • WLL (cdma) ……………………………………………….
      • GSM (mobile) …………………………..…………………
      • 3G ………………………………………………………...
• Reference…………………………………………………………………..         104

ACKNOWLEDGEMENT

➢ I am Indebted to My Colleagues of Electronics & Communication Department at Wahdwan City, Kotharia Road. Who have helped inspired encouragement in various ways in completing this task? I am pleased to acknowledgement the helpful comments and suggestions provided by many student.

    ➢               No words can give an adequate expression to our feelings of indebtedness.

    ➢ To our guide Mr. D. N. Parmar (S.D.E) B.S.N.L Exchange Dhangadhra phones work of...