How does Global System for Mobile Communication work?

The Global System for Mobile Communication (GSM) is a standard developed for mobile telecommunications that enables mobile devices to communicate over a cellular network. It operates by dividing geographic areas into cells, each served by a base station, which connects users to the network. GSM uses time division multiple access (TDMA) to allow multiple users to share the same frequency channel by dividing the signal into time slots. Additionally, it incorporates encryption and various protocols to ensure secure and efficient communication between mobile devices and the network.