JP2906361B

A multiplexer control system is used to control multiplexing of data of a plurality of channels including channels having different transmission speeds. The multiplexer control system includes a bit map memory storing, in a bit map format, bits indicating existence of output timings respectively corresponding to different transmission speeds, a rate setting memory in which identification numbers indicating the transmission speeds are set in correspondence with the channels, and a controlling part for outputting an output timing signal depending on the transmission speed of the corresponding channel, based on the bit which indicates the existence of the output timing and is read by making access to the bit map memory and the identification number read by making access to the rate setting memory. The output timing signal determines the multiplexing of the data of the plurality of channels.