# Signaling modules and logical timeslots

On AG 2000C boards, each signaling module is hardwired to a specific logical timeslot on the local bus. Each signaling module supports four ports of telephone network connectivity and is permanently connected to four pairs in the RJ-21 connector. Each pair is therefore bound to a corresponding timeslot on the local bus. The following illustration shows the relationship between signaling modules, timeslots, and the connector for AG 2000C boards:

Logical timeslots, signaling modules, and RJ-21 connector