Вђ“ Architecture, Protocols And Services | Gsm

GSM provides a variety of standard services and built-in security measures:

A permanent database containing subscriber profiles and their last known location. GSM – Architecture, Protocols and Services

The central node for call routing and management. GSM provides a variety of standard services and

Uses the Subscriber Identity Module (SIM) to store unique identity information. Security is maintained through a challenge-response authentication mechanism and over-the-air encryption using algorithms like A5. GSM – Architecture, Protocols and Services

Manages radio transmissions over the air interface (Um interface) using a combination of FDMA and TDMA .