ISDN MULTI-SUBSCRIBER MATCHING CIRCUIT

摘要

The ISDN (integrated services digital network) basic access multiplexr CEPT interface circuit includes a B-channel interface circuit for transmitting and receiving a B-channel for 12 basic accesses onto a PCM subhighway, a time/space switching circuit for controlling each CEPT interface and providing a subhighway data transmitting/receiving path and D-channel and CV1-channel data transmitting/receiving paths, a hybrid circuit, a line interface circuit for converting a unipolar signal to a bipolar signal and converting the bipolar siganl received from a subscriber line to the unipolar signal, a D/C channel interface cirucit connected to the time/space switching circuit, a common memory, and a microprocessing unit, thereby raising the reliability of a multiplexer network.