DEVICE FOR SERVICE COMMUNICATION Russian patent published in 1994 - IPC

FIELD: electrical communication. SUBSTANCE: device has conversation unit, coder-decoder, switching unit, command receivers, command distribution unit, clock input and command recording input. The command receiver has the first counter, flip-flop, OR gate, decoders unit, series-parallel register, AND gates and delay line. The conversation unit has amplifier, handset, decoder, flip-flops, indication and warning assembly, series-parallel register and dialing assembly. Switching unit has register, comparator, OR gates, parallel-series register, counter, flip-flop, AND gate. Command distribution unit has interrupt priority former, control circuit, group of registers, group of OR gates and decoder. EFFECT: reduced time for connecting calling and called parties by avoiding conflict situations. 4 dwg