SYSTEM FOR TRANSMISSION OF DIGITAL TELEPHONE SIGNALS Russian patent published in 1995 - IPC

FIELD: telephone communication. SUBSTANCE: system for transmission of digital telephone signals includes modules of subscriber's concentration, each being connected to remote subscriber's modules, two-cable communication line, wire communication lines manufactured in the form of cable television lines and N digital telephone sets. Unit tracking remote subscriber's modules is connected through interface to cable television line and incorporates first and second signal matrix units, receiver of synchronization signals, threshold unit, decoder of number of communication channel, decoder of numbers digital telephone sets, first and second flip-flops controlling reset, controlling matrix unit, multichannel receiver, amplifier-former. Unit mating digital telephone sets coupled to the other end of cable television line through interface includes receiver of synchronization signals, unit of extraction of frequency of frame, gate former of permission pulse, coincidence unit, receiver, first and second pulse formers, telephone signal former, detector of unengaged channel control unit, transmitter, first and second OR gates, adder, former of number of digital telephone sets, buffer unit, former of clearing code. EFFECT: provision for realization of requirements on electromagnetic compatibility of telephone communication lines inside buildings. 6 dwg