Radio fax transmission

Details Radio fax transmission Radio fax transmission

1988-02-12

1990-06-12

Olms, Douglas W.

Facsimile and static presentation processing

Facsimile

Auxiliary signal

358400, 370 24, 330 69, 379100, 455 78, H04N 132

Patent

active

049337700

ABSTRACT:
Disclosed is an audio-to-radio and radio-to-audio signal converter and method for interfacing a facsimile machine with a radio transmitter-receiver having a microphone input, an audio output and a push-to-talk relay. The converter provides a first circuit for inputting the output signal of a facsimile machine to the microphone input of a radio transmitter-receiver; a second circuit controlled by the output signal of the facsimile machine for operating the push-to-talk relay of the radio transmitter-receiver; and a third circuit connected to the audio output of the transmitter-receiver for amplifying the audio output signal, and inputting the resultant signal to the facsimile machine. A fourth circuit provides a null feedback that keeps the stronger audio signals from being amplified which may trigger the push-to-talk relay.

REFERENCES:
patent: 2599904 (1952-06-01), Evans
patent: 3479451 (1969-11-01), Regunberg et al.
patent: 3641432 (1972-02-01), Bond
patent: 4055729 (1977-10-01), Vandling
patent: 4809297 (1989-02-01), Polmsky et al.

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