Voice alarm signalling system

Details Voice alarm signalling system Voice alarm signalling system

1980-05-09

1982-08-31

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

370111, 179 2R, H04L 500

Patent

active

043476074

ABSTRACT:
Voice and alarm signalling capability between supervisory personnel at monitor and control sites located at separated transceiver facilities of a (repeatered) multichannel communication network is provided by a multichannel multiplexed encode/decode scheme in which voice and/or alarm signals generated at one station are digitally encoded and formatted so as to be inserted into the data stream of the normally conveyed data traffic over the active channels of the network. At the receiving terminal site, these inserted signals are removed from the high data rate digital data stream and delivered to decoding equipment which reconstructs the original voice and/or alarm signals for delivery to the audio equipment of station operation personnel. The encoded signals are inserted as overhead bits for each active channel, so that a fault on one channel will not prevent the completion of trasmission of the intended communication between terminal site personnel.

REFERENCES:
patent: 3542957 (1970-11-01), Mitchell
patent: 3549814 (1970-12-01), Jaeger
patent: 3634627 (1972-01-01), Velentini
patent: 3864521 (1975-02-01), DeLong
patent: 3911218 (1975-10-01), Suzuki
patent: 4168399 (1979-09-01), D'Amico
patent: 4227248 (1980-10-01), Munter

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