Telephone answering programming devices

Details Telephone answering programming devices Telephone answering programming devices

1979-01-12

1987-02-24

Richardson, Robert L.

Telephonic communications

Audio message storage, retrieval, or synthesis

Dynamic audio signal recording or reproduction

379 79, H04M 164

Patent

active

046458751

ABSTRACT:
Output of an amplifier is continuously coupled to the line during line seizure, not loading the line during standby. Input to a second amplifier is coupled to the line at least during line seizure. An SCR flip-flop provides power to the announcement deck and message deck and may power these decks alternately.

REFERENCES:
patent: 2815401 (1957-12-01), O'Dwyer
patent: 3008012 (1961-11-01), Proctor
patent: 3344234 (1967-09-01), Salzberg
patent: 3445600 (1969-05-01), Todd
patent: 3501592 (1970-03-01), Waldman
patent: 3524936 (1970-08-01), Hill
patent: 3586779 (1971-01-01), Chernack
patent: 3590160 (1971-06-01), Meri
patent: 3592968 (1971-07-01), Ogawa
patent: 3644682 (1972-02-01), Parilla
patent: 3649762 (1972-03-01), Okamura
Spratt, Simple Telephone Answering Machine, Wireless World, 7/56, pp. 344-346.

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