19-12-2012, 02:54 PM
STUDY ON BSNL TECHNOLOGIES
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BHARAT SANCHAR NIGAM LIMITED
(BSNL) OVERVIEW
Bharat Sanchar Nigam
Limited (abbreviated BSNL) is a state-
owned telecommunications company headquartered
in New Delhi, India. BSNL is one of the largest
Indian cellular service providers, with over 87.1
million subscribers as of April 2011, and the
largest land line telephone provider in India.
However, in recent years the company's revenue
and market share plunged into heavy losses due to
intense competition in Indian telecommunications
sector.
BSNL is India's oldest and largest communication service provider (CSP). It had a customer base
of 90 million as of June 2008.It has footprints throughout India except for the metropolitan cities
of Mumbai and New Delhi, which are managed by Mahanagar Telephone Nigam Limited
(MTNL). As of June 30, 2010, BSNL had a customer base of 27.45 million wire line and 72.69
million wireless subscribers.
OTSOFT:
Dot Soft is the first integrated telecom software application in BSNL comprising of commercial,
billing, accounting, fault repair service and directory enquiry services.
It has been conceptualized, designed and developed entirely by the core group of the Software
Development Centre of the O/o CGMT, AndhraPradesh Telecommunications Circle, Hyderabad.
It is based on the latest software technologies running on a WAN and is the first of its kind in
BSNL in the field of information technology.
First it was tested and implemented in Guntur SSA in 1997.
It has been successfully implemented in 171 SSAs across the country. All the SSAs of Andhra
Pradesh, Tamilnadu, Karnataka, Assam, Punjab, Chhattisgarh and Gujarat Telecom circles.
Rest of SSAs is from states of Maharashtra, Madhya Pradesh, Uttar Pradesh, Rajasthan, J&K and
Haryana.
It has been approved by the Telecom Commission for implementation all over India.
Dot soft ensures better customer satisfaction and transparency in BSNL service.
Dot Soft is an enterprise wide telecom database system that revolutionizes the operation and
supervision of customer services by enabling all the personnel to work online.
The central server contains the complete database to which all the nodes anywhere in the district
log in. The database is accessed using application software residing in the nodes which have GUI
interface.
MAKING A TELEPHONE CALL
A telephone call starts when the caller lifts the handset of the base. Once the dial tone is heard,
the caller uses a rotary or a push button dial mounted either on the handset or on the base to enter
a sequence of digits, the telephone number of called party. The keys control a tone generator
circuit that makes DTMF tones that the exchange receives. A rotary-dial telephone uses pulse
dialing, sending electrical pulses, that the exchange can count to get the telephone number. The
exchange determines whether the called party is in the same exchange or different ones. If the
called is in the same exchange, burst of ringing current is applied to the called partys line. Each
telephone contains a ringer that responds to specific electric frequency. When the called party
answers the telephone by picking up the handset, steady current starts to flow in the called
partys line and is detected by the exchange. The exchange then stops applying ringing and sets
up the connection between the caller and the called party. If the called party is in different
exchange from the caller, the caller exchange sets up the connection over the telephone network
to the called partys exchange. The called party then handles the process of ringing, detecting an
answer, and notifying the calling and billing machinery when the call is completed. When
conversation is over, one or both parties hang up by replacing their handset on the base, stopping
the flow of current. The exchange then initiates the process of taking down the connection,
including notifying billing equipment of the duration of the call if appropriate.