GSM - Global System for Mobile Communications
Global System for Mobile Communications, is a standard set developed by the European Telecommunications Standards Institute (ETSI), as a replacement for first generation (1G) cellular networks.
Technical Details - GSM uses narrow band TDMA, that is 30 kHz wide and 6.7 milliseconds long, split time-wise into three time slots which allows eight simultaneous calls on the same radio frequency.
Features provided by GSM Cellular Network :-
- Short Message Service (SMS) for text messages
- Authentication and security to make phone calls more secure
- Call forwarding
- Call waiting
- Multi-party conferencing