DIGITAL SELECTIVE COMMUNICATION SYSTEM Russian patent published in 1994 - IPC

FIELD: electric communication. SUBSTANCE: system has central station, users' assemblies, communication channel. Central station has receiver, call signal identifier, storages, call triggers, call signal former, board, keyboard decoder, memory unit, transmitter, master oscillator, control unit, demultiplexer and individual coding unit. Users' assemblies have the first and the second receivers, the first and the second transmitters, control signal identifier, accumulator, trigger, user's desk, multiplexer, master oscillator, encoder and individual coding unit. EFFECT: improved noise immunity at data communications between users' assemblies and central station. 3 dwg