Telephone handset interface with feedback control

Details Telephone handset interface with feedback control Telephone handset interface with feedback control

1996-02-06

1999-02-02

Weaver, Scott L.

Telephonic communications

Substation or terminal circuitry

Conversion of signal form

379392, 379395, H04M 120

Patent

active

058675736

ABSTRACT:
A telephone handset interface reduces or eliminates feedback induced singing in a telephone handset/hybrid loop. The interface provides for user selectable volume control settings, each setting representing an amount of gain or loss to be applied to the transmit and receive signals within the telephone set. The gain settings are selected to limit overall loop gain so as to reduce or eliminate any tendency of the handset to sing at high receive gain levels. Loss inserted into the transmit circuit is removed when user speech is detected in the transmit circuit.

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patent: 5471528 (1995-11-01), Reesor
patent: 5615256 (1997-03-01), Yamashita

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