08-07-2014, 10:08 AM
BSNL SUMMER TRAINING
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INTRODUCTION
STARTED in October 2000, with the vision of becoming the largest telecom service provider in Asia, Bharat Sanchar Nigam Limited is the world’s seventh largest telecommunications company. It provides a comprehensive range of services in India, which include wireline connections, CDMA (code division multiple access) mobile, GSM (global system for mobile communications) lines, Internet, broadband, MPLS-VPN (multi protocol label switching-virtual private network), VSAT (very small aperture terminal) and VoIP (voice over Internet protocol). Within this short span of time, it has also become one of the largest public sector companies in India.
EXCHANGE
Equipment which effects interconnected of telephones is known as switching equipment.
The switching centre, which houses the terminating and switching equipment is called telephone exchange.
C-DOT:-
Work on telecom technology products and services.
Provide solutions for current and future requirements of telecommunication and converged networks including those required for rural application.
Provide market orientation to R & D activities and sustain C-DOT as center of excellence.
OCB:-
It is a digital switching system.
The system supports all the existing signaling system
The system has ‘auto recovery’ feature. When a serious fault occur in control unit, it gives a message to SMM (operation & maintenance unit).
MAIN DISTRIBUTION FRAME(MDF):-
Local cable contact at MDF .
All types of cables out to the door contact connection at MDF .
The primary function of MDF is to remove fault. It is also known as Fault Remove Section.
The telephone numbers are also disconnected in the MDF because of some specific reason.
Incoming calls
Gateway MSC contact:-The first job of the Gateway MSC is to determine the current location of the mobile phone in order to connect the call. It does this by consulting the Home Location Register (HLR)
Routing the call:- When the HLR receives this query message, it determines whether the call should be routed to another number (called a divert), or if it is to be routed directly to the mobile.
Locating and ringing call:-When the call arrives at the Visiting MSC, the MSRN is used to determine which of the phones in this area is being called, that is the MSRN maps back to the SIM of the original phone number dialled. The MSC pages all the mobile phone masts in the area in order to inform the phone that there is an incoming call for it.
OUTGOING CALLS
Once a mobile phone has successfully attached to a GSM network as described above, calls may be made from the phone to any other phone on the global PSTN.
The user dials telephone no, presses the send or talk key, and the mobile phone sends a call setup request message to the mobile phone network via the nearest mobile phone base transceiver station (BTS).
Broadband Services Applications
High Speed Internet Access Always-On(Talk & Surf Simultaneously on same Telephone Line )
LAN Access (Teleworking): Virtual Private Network (VPN) for Corporate Customers
Broadcast TV/Video On Demand
Video Conferencing, Gaming & Home Shopping-Interactive Services
Distance Learning & Tele Medicine
[attachment=65710]
INTRODUCTION
STARTED in October 2000, with the vision of becoming the largest telecom service provider in Asia, Bharat Sanchar Nigam Limited is the world’s seventh largest telecommunications company. It provides a comprehensive range of services in India, which include wireline connections, CDMA (code division multiple access) mobile, GSM (global system for mobile communications) lines, Internet, broadband, MPLS-VPN (multi protocol label switching-virtual private network), VSAT (very small aperture terminal) and VoIP (voice over Internet protocol). Within this short span of time, it has also become one of the largest public sector companies in India.
EXCHANGE
Equipment which effects interconnected of telephones is known as switching equipment.
The switching centre, which houses the terminating and switching equipment is called telephone exchange.
C-DOT:-
Work on telecom technology products and services.
Provide solutions for current and future requirements of telecommunication and converged networks including those required for rural application.
Provide market orientation to R & D activities and sustain C-DOT as center of excellence.
OCB:-
It is a digital switching system.
The system supports all the existing signaling system
The system has ‘auto recovery’ feature. When a serious fault occur in control unit, it gives a message to SMM (operation & maintenance unit).
MAIN DISTRIBUTION FRAME(MDF):-
Local cable contact at MDF .
All types of cables out to the door contact connection at MDF .
The primary function of MDF is to remove fault. It is also known as Fault Remove Section.
The telephone numbers are also disconnected in the MDF because of some specific reason.
Incoming calls
Gateway MSC contact:-The first job of the Gateway MSC is to determine the current location of the mobile phone in order to connect the call. It does this by consulting the Home Location Register (HLR)
Routing the call:- When the HLR receives this query message, it determines whether the call should be routed to another number (called a divert), or if it is to be routed directly to the mobile.
Locating and ringing call:-When the call arrives at the Visiting MSC, the MSRN is used to determine which of the phones in this area is being called, that is the MSRN maps back to the SIM of the original phone number dialled. The MSC pages all the mobile phone masts in the area in order to inform the phone that there is an incoming call for it.
OUTGOING CALLS
Once a mobile phone has successfully attached to a GSM network as described above, calls may be made from the phone to any other phone on the global PSTN.
The user dials telephone no, presses the send or talk key, and the mobile phone sends a call setup request message to the mobile phone network via the nearest mobile phone base transceiver station (BTS).
Broadband Services Applications
High Speed Internet Access Always-On(Talk & Surf Simultaneously on same Telephone Line )
LAN Access (Teleworking): Virtual Private Network (VPN) for Corporate Customers
Broadcast TV/Video On Demand
Video Conferencing, Gaming & Home Shopping-Interactive Services
Distance Learning & Tele Medicine