Full duplex audio response device

Details Full duplex audio response device Full duplex audio response device

1977-08-26

1980-03-04

Konick, Bernard

179 2DP, H04M 1100

Patent

active

041918550

ABSTRACT:
In an audio response device comprising an incoming trunk, a push button signal receiver, a voice output unit and a control unit and associated with a terminal set such as a push button calling telephone set, there is provided a full duplex audio response device which includes a hybrid circuit disposed in the incoming trunk associated with the terminal set and a band-pass filter interposed between the voice output unit and the hybrid circuit for filtering a frequency component corresponding to a specified push button, and in which the hybrid circuit may receive a voice output signal passed through the band-pass filter and a push button signal from the terminal set simultaneously so that the push button signal can be received even when the voice output signal is transmitted to the terminal set.

REFERENCES:
patent: 3103558 (1963-09-01), Ligotky
patent: 3226480 (1965-12-01), Wright
patent: 3347988 (1967-10-01), Marill
patent: 3647972 (1972-03-01), Glover
patent: 3992587 (1976-11-01), Puckett

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