SYSTEM FOR RECEIVING AND PROCESSING HDLC FRAMES ON A TIME DIVISION MULTIPLEX PCM TYPE LINK, ESPECIALLY FOR A DATA SWITCH

摘要

A system for receiving and processing HDLC frames on a TDM PCM type link uses common circuitry for all the frame decoding and processing channels while allowing for the fact that each frame has to be processed in a specific way. It comprises a multiplexed HDLC frame receive device common to all the channels and supplying for each PCM channels in a frame a receive word comprising a data byte and status information relating to said byte. A transcoding device is addressed using information relating to the length of each received frame. A programmed automatic processor receives data bytes and processing information from the transcoding device in order to apply to said byte the processing indicated by the processing information.