A method of multiplexing
several communication channels on one higher bandwidth channel
. It works by quickly cycling
around each of the smaller channels in a round-robin
fashion, taking a sample from each and putting it out over the larger channel. By staying synchronize
d with the multiplexer
, the demultiplexer
can read the samples off the higher bandwidth channel and place them, round-robin, back onto lower bandwidth channels at the receiving end.
In addition to the transmitted data, synchronization information is sent, sometimes on an alternate signalling channel. If the mux and demux get out of sync, the information will end up on the wrong channels at the receiving end, and all hell will break loose.