Time Division Multiplexing (TDM) is a technique used to transmit multiple signals or data streams over a single communication channel by dividing the channel's time into discrete slots
Each signal is allocated a specific, recurring time slot
A TDM frame is a structure that contains one complete cycle of time slots
Within one frame, there is typically one time slot allocated to each individual input signal or sub-channel being multiplexed onto the main channel
For example, if multiplexing 4 sub-channels, a TDM frame would consist of 4 time slots, with slot 1 carrying data from sub-channel 1, slot 2 from sub-channel 2, and so on
Therefore, one TDM frame consists of one time slot per sub-channel (or input signal)