Telephone call selector

Details Telephone call selector Telephone call selector

1987-09-03

1989-01-31

Brown, Thomas W.

Telephonic communications

Audio message storage, retrieval, or synthesis

379199, 379373, 379374, H04M 157, H04M 164, H04M 166

Patent

active

048022020

ABSTRACT:
A telephone call selector in a telephone which comprises a memory circuit for storing a plurality of telephone numbers; an automatic dialing device operable to read out one of the telephone numbers from the memory circuit and to output a dialed signal representative of such one of the telephone numbers; a comparator for comparing a number, corresponding to a DTMF signal transmitted from a calling party subsequent to the receipt of a ringing signal generated from a local telephone of the calling party, with any one of identifier codes; and a loudspeaker device for emitting ringing sounds when the the number corresponding to the DTMF signal coincides with such one of the identifier codes. The telephone numbers stored in the memory circuit are utilized as the respective identifier codes.

REFERENCES:
patent: 3644675 (1972-02-01), Watlington
patent: 3925622 (1975-12-01), Robinson
patent: 4006316 (1977-02-01), Bolgiano
patent: 4266098 (1981-05-01), Novals
patent: 4387272 (1983-06-01), Castro et al.
patent: 4446334 (1984-05-01), Groff

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