What is t1 in gsm?

In GSM (Global System for Mobile Communications), T1 refers to a specific time slot in the time division multiple access (TDMA) frame structure. Each TDMA frame consists of eight time slots, allowing multiple users to share the same frequency channel by sending and receiving data in rapid succession. T1 typically represents the first time slot in this sequence, which is crucial for synchronizing communication between the mobile station and the base station.