Radio-telephone interconnection system

Details Radio-telephone interconnection system Radio-telephone interconnection system

1977-02-28

1978-10-10

Claffy, Kathleen H.

325 22, H04B 146, H04B 700, H04M 1100

Patent

active

041198000

ABSTRACT:
Circuitry for interconnecting a radio transceiver to a telephone line is disclosed. The circuitry provides controlled access to the telephone system lines from remote radio transceivers by way of a base transmitter-receiver unit which is connected through an impedance matching network to the telephone line. A carrier operated relay responsive to the base receiver unit controls access to the telephone line by means of a time delay relay whereby signals received by the base station are connected to the telephone line. Audio signals originating in the telephone line are detected by a voice operated relay which activates the base unit transmitter to transmit such audio signals for two way communication with the remote radio unit on a single frequency channel.

REFERENCES:
patent: 2935605 (1960-05-01), Mathieu
patent: 3366880 (1968-01-01), Driver
patent: 3443035 (1969-05-01), McCay
patent: 3557312 (1971-01-01), Vogelman et al.
"The Radio Amateur's Handbook", American Radio Relay League, 1976 Ed. (Newington, Conn.), pp. 479-480.

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