Synchronous Time Division Multiplexer |
Asynchronous Time Division Multiplexer |
Multiplexer allocates same time slot to each device. |
Multiplexer does not allocate same time slot to each device. |
Number of slots per frame is equal to number of input devices. |
Number of slots per frame are less than the number of input devices. |
Number of devices supported by synchronous time division multiplexer are less than asynchronous time division multiplexer. |
Asynchronous time division multiplexer supports more devices than synchronous time division multiplexer. |
Number of time slots in a frame is based on number of input devices. |
Number of time slots in a frame is based on statistical analysis. |
It does not guarantee that the full capacity of link is used. |
It guarantees that the full capacity of the link is used. |
Time slots are preassigned. |
Time slots are not preassigned. |
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