Direct coupling of telephone volume control with remote...

Details Direct coupling of telephone volume control with remote... Direct coupling of telephone volume control with remote...

2006-09-05

2006-09-05

Swerdlow, Daniel (Department: 2615)

Telephonic communications

Substation or terminal circuitry

Noise suppression

C379S390010, C381S105000

Reexamination Certificate

active

07103176

ABSTRACT:
The present invention creates a method, apparatus and system by which a telephone unit volume control provides instantaneous coupling to and controlling of a connected telephone unit's microphone gain and noise cancellation circuitry. With this invention, an increase in the volume control on the first unit, will result in an automatic adjustment of the second unit's microphone gain control. This microphone gain adjustment is an amount corresponding to the adjustment of the volume of the first unit. The noise cancellation circuitry on the second unit is adjusted to filter more of the background noise before transmission instead of after the receipt of the signal at the destination telephone.

REFERENCES:
patent: 561423 (1896-06-01), Minnis
patent: 4773088 (1988-09-01), Matheny
patent: 5150404 (1992-09-01), Jordan
patent: 5867573 (1999-02-01), Wittman
patent: 6061431 (2000-05-01), Knappe et al.
patent: 6304654 (2001-10-01), Wittman
patent: 6504926 (2003-01-01), Edelson et al.
patent: 2001192560 (2001-06-01), None
patent: WO 9818238 (1998-04-01), None

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