GSM is the Global System for Mobile Communication, the most popular standard for mobile networks. It has advantages of capacity, compatibility, cost, quality and security. GSM uses digital transmission and switches instead of analog transmission. The main components of a GSM network are the mobile station (MS), the base station subsystem (BSS) including base transceiver stations (BTS) and base station controllers (BSC), the network switching subsystem (NSS) including the mobile switching center (MSC), and the home location register (HLR) and visitor location register (VLR).

2. GSM
GSM
GSM Global System for Mobile
Communication
( ).

3. • Capacity
• Compatibility
• Cost
• Quality
• Security

4. Digital Vs Analog

5. GSM
• The Mobile Station (MS).
• The Base Station Subsystem (BSS).
• The Network and Switching
Subsystem (NSS).
• The Operation and Support
Subsystem (OSS).

7. • :-
1.
2. sim card

9. Base Station Subsystem BSS
1.Base Transceiver Station BTS.
2.Base Station Controler BSC
3.Transcoding and Rate Adaptation Unit
TRAU

10. Base Station Subsystem BSS

11. Base Station Controler BSC

12. Base Station Controler BSC

13. Base Station Controler BSC

14. The Mobile service Switching
Center MSC

15. MSC

16. HLR Home Location Register

17. Visitor Location Register VLR

18. AUC

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21. Q&A Section