- Multiplexing in which a single channel is utilized to transmit multiple signals, each with its allocated time slot. Using this technique, several lower speed signals are multiplexed into a higher speed channel for transmission, and are demultiplexed at receiving locations. Used, for instance, to combine voice or data channels into high-bandwidth circuits such as T1 or E1. Also, the technology enabling such multiplexing. Its abbreviation is TDM.