Push-button telephone dialing device with telephone hold functio

Details Push-button telephone dialing device with telephone hold functio Push-button telephone dialing device with telephone hold functio

1991-08-27

1994-02-08

Dwyer, James L.

Telephonic communications

Supervisory or control line signaling

Substation originated

379393, 341 26, H04M 100

Patent

active

052854957

ABSTRACT:
A push-button telephone dialing device for a telephone set has a push-button keypad with a plurality of keys which include a hold function key, and a telephone dialing integrated circuit including a key input signal generator wired to the push-button keypad and producing an appropriate key input signal corresponding to a key pressed on the push-button keypad. The key input signal generator produces a hold function key input signal whenever the hold function key is pressed. The telephone dialing integrated circuit further includes a speech network interrupt circuit which receives the hold function key input signal from the key input signal generator. The speech network interrupt circuit is wired to and controls the operation of a speech network of the telephone set.

REFERENCES:
patent: 4419543 (1983-12-01), Kelm et al.
patent: 4440981 (1984-04-01), Grantland et al.
patent: 4517414 (1985-05-01), Boeckmann
patent: 4529843 (1985-07-01), Boeckmann
patent: 4972454 (1990-11-01), Toki et al.
patent: 5003587 (1991-03-01), Forbes

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