Which of the following Time Division Multiplexing technique is better and why? 1) Synchronous TDM 2) Asynchronous TDM

Answer

Asynchronous TDM is better than Synchronous TDM, because Asynchronous TDM permits maximization of the link. It allows a number of lower speed input lines to be multiplexed to a single higher speed line. In Asynchronous TDM the total speed of the input  lines can be greater than the capacity of transmission medium. Asynchronous TDM eliminates predetermined time slots. Input from source terminals are buffered in a queue until the multiplexer device scans the input buffer and assigns data to available time slots until the frame is full and then the multiplexed signal is sent on the network. Asynchronous TDM has the ability to allocate time slots dynamically to corresponding devices. Asynchronous TDM dynamically assigns the available time slots only to users who need data  transmission. According to the facts given above, it is clear that asynchronous TDM is better than synchronous TDM.