Frequency division multiplex voice communication apparatus with

Details Frequency division multiplex voice communication apparatus with Frequency division multiplex voice communication apparatus with

1976-08-30

1977-09-20

Stellar, George G.

179 18D, 179 30, H04M 170

Patent

active

040499146

ABSTRACT:
A multiplexed signal transceiver for use with an existing audio frequency paging system wherein multiplexed RF signals are superimposed upon audio paging signals in the communication system. As disclosed, the transceiver, in addition to a normal party-line channel, has a semiprivate operating mode such that other party line substation transceivers can only listen to signals from master stations but not from other substations.

REFERENCES:
patent: 1429248 (1922-09-01), Osborne
patent: 1957288 (1934-05-01), Portman
patent: 3548106 (1970-12-01), Watson et al.
patent: 3651274 (1972-03-01), Angner et al.
patent: 3806655 (1974-04-01), Hekimain et al.

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