Characteristics of GSM Standard

1. Fully digital system using 900,1800 MHz frequency band.
2. TDMA over radio carriers(200 KHz carrier spacing.
3. 8 full rate or 16 half rate TDMA channels per carrier.
4. User/terminal authentication for fraud control.
5. Encryption of speech and data transmission over the radio path.
6. Full international roaming capability.
7. Low speed data services (upto 9.6 Kb/s).
8. Compatibility with ISDN.
9. Support of Short Message Service (SMS).