This document provides an overview of technologies used in communication and networking at BSNL Jhansi. It discusses BSNL's history and services, including landline, broadband, and mobile services. It describes telephone exchanges and networking infrastructure. It also covers mobile technologies like GSM, GPRS, and 3G, explaining their architectures and data speeds. Finally, it introduces the OSI networking model and its seven layers.

1. STUDY OF TECHNOLGIES
IN COMMUNICATION &
NETWORKING
AT
BSNL ,JHANSI
NAME

2. CONTENTS
About BSNL
Telephone Exchange
GSM
GPRS
3G
INTERNET

3. ABOUT BSNL
 BSNL was founded on 1st oct. 2000.
 Before the foundation of BSNL all the
telecom related work was handled by
Department of Telecommunication (DOT.)
 It is providing the services in all over India
Except Delhi & Mumbai.

4. TELECOM STRUCTURE
India is divided into 22 telecom
circles.
Each circle is further divided into
divisions.
 Each circle is controlled by CGMT .

5. BSNL SERVICES
 Landline
 Broadband (such as Dial up Internet,
Landline ,Mobile & Fiber Broadband )
 Mobile Services (GSM/2G ,3G )
 Enterprises Services (WI-MAX ,
Lease line)

6. EXCHANGE
SWITCH
SUBSCRI
-BER
LINE
JACK
UNIT
DP
CABINET
/PILLARS
MDF

7. GSM
It is a Second Generation (2G)
mobile phone system.
It uses both FDMA & TDMA
technique.
2G GSM networks operate in 900
MHz or 1800 MHz bands.

8. GSM ARCHITECTURE
MSCBSCBTS
TRX
EIR
HLR
VLR
OMC
AuC
PSTN
MS
MS
MS
Cellular
Antenna

9. GPRS
 General packet radio service (GPRS)
is a packet oriented mobile data service
for 2G cellular communication system.
 it provides data rate of 54-114 Kbps.
 It provides the services like Internet
access & MMS.

10. 3G
 It is 3rd generation network to provide
the high data speed.
 3G system consist of two main
standards,CDMA2000 & W-CDMA.
 It provides minimum data rate of
2 Mbps for stationary or walking users
and 384 Kbps for moving vehicle.

11. INTERNET
 Internet is a group of various co-
operating computers ,inter connected
worldwide by computer based on
TCP/IP communication protocols.

12. OSI NETWORKING MODEL
 The open system interconnection
model defines all the methods and
protocols needed to connect one
computer to any other over a
network.
 It consist of seven layers.

13. OSI MODEL LAYERS
Data link
Network
Transport
Session
Application
Presentation
Physical
Data generation
Encryption & Formatting
Establish connection
Delivery & Sequencing
Routing to destination
Local network host delivery
Access to media

14. THANK YOU