Off-hook detector for headset

Details Off-hook detector for headset Off-hook detector for headset

1997-04-23

1998-11-03

Hunter, Daniel S.

Telephonic communications

Supervisory or control line signaling

Using line or loop condition detection

379387, H04M 160

Patent

active

058320750

ABSTRACT:
An event detector for a headset connected to a telephone, comprising a switch for short circuiting a microphone of the headset and a circuit for detecting a hookswitch flash in the event the duration of the short circuiting of the microphone is greater than a predetermined minimum and less than a predetermined maximum duration.

REFERENCES:
patent: 985169 (1911-02-01), Hartnett
patent: 3839604 (1974-10-01), Pardee
patent: 4614845 (1986-09-01), Conlon
patent: 4928306 (1990-05-01), Biswas et al.
patent: 5210791 (1993-05-01), Krasik
patent: 5504812 (1996-04-01), Vangarde

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