“BHARAT SANCHAR NIGAM LIMITED” is abbreviated as BSNL. It is fourth
largest departement of TeleCommunication Company in Asia and seventh in
world today. Which is one of the most earning revenue in India. Above more than
3 laces employees, officer and engineers working in BSNL at present.
Previously electro mechanically exchanges for use in India namely
Strowger type exchange, cross bar exchange were there.
These manual telephone exchanges suffered from some disadvantages.
To overcome these an automatic exchange was introduced in this system.
In 1980’s PITHROTHA LTD. Introduced “ C-DOT ” exchange in India.
These exchanges replaced by electro mechanical exchange.
These exchange which has wide range of capacity replaced electro
mechanical exchange, C-DOT-128, C-DOT-256, C-DOT-512, C-DOT-
1024(SBM) exchange, C-DOT-2048(MBM) exchange and so on.
Besides C-DOT exchange ILT exchange, E-10B exchange also proved
of mild stone in Telecommunication Sector to replace electromechanical
exchanges, which were most sophisticated and modern latest techniques
electronics exchanges.
There after it was OCB-283 exchange which proved very important
exchange in this series to replace electro mechanical exchanges.
Now it is “WLL” & “GSM” mobiles which is also proved a mild stone
in Telecommunication sector. It was 31st march 2002 when BSNL started these
GSM mobile and today it has provided almost 35 lacks mobiles in all over
country. WLL system which is also a mobile with limited mobility in city & can
have Tele communication facility in that area almost. While GSM can cover all
cities of the country.
DOT provides the following facilities :
• Telegraph services
• Telephone services such as Local calls, Trunk calls, Overseas calls etc.
• Wireless services including mobile wireless services for police, defense,
metrological departments, etc
• Renting of Broadcast & TV channels
• Telecom Bureau Services
• Data Services
• FAX Services
Telecom factories to manufacture telephone switching boards and accessories
at Bhilai, Mumbai, Calcutta and Jabalpur.
• I.T.I. Bangalore for the manufacturing for the carriers, VFT, Coaxial and
microwave equipment.
• I.T.I. Gonda for the manufacturing of E-10B electronic exchange
equipment.
• Hindustan Cables LTD. Hyderabad & Rupnarainpur for manufacturing
underground cables.
• Hindustan teleprinters LTD Chennai for manufacturing teleprinters.
Local telecom network at the metropolitan cities of Mumbai and Delhi are under
the MTNL(Mahanagar Telephone Nigam Limited). Its Corporate office is at Delhi.
Hence Telecommunication sector has changed our life style today entirely
and today it seems that world has become very small.
