A data multiplexing system which includes a plurality of data multiplexing buses through which a plurality of low-speed digital signals are collected into, and distributed from, a multiplexer/demultiplxer. In a data multiplexing mode, the low-speed digital signals entered from a plurality of...http://www.google.de/patents/US5757806?utm_source=gb-gplus-sharePatent US5757806 - Data multiplexing system having at least one low-speed interface circuit connected to a bus 
