Circuit for triggering on-hook function and off-hook...

Details Circuit for triggering on-hook function and off-hook... Circuit for triggering on-hook function and off-hook...

2007-09-04

2007-09-04

Ramakrishnaiah, Melur (Department: 2614)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S575100, C455S569100

Reexamination Certificate

active

10759367

ABSTRACT:
The present invention is a circuit that is set in a communication apparatus. The circuit is co-operated with a button of an audio receiving/transmitting device for triggering an on-hook or off-hook function when the communication apparatus receives an incoming call. The button is normally closed. The on-hook and off-hook functions are triggered by a triggering signal which is higher than a threshold value. Thus, the present invention doesn't execute the on-hook or off-hook function by an on/off button set in the communication apparatus but directly execute the button set in the audio receiving/transmitting device, which improved the convenience of the communication apparatus.

REFERENCES:
patent: 4802207 (1989-01-01), Uchida
patent: 6122369 (2000-09-01), Hwang et al.
patent: 2002-237873 (2002-08-01), None

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