Telephone handset interface with feedback control
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United States of America Patent
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-
Oct 16, 2001
Issued Date -
N/A
app pub date -
Jun 9, 1998
filing date -
Feb 6, 1996
priority date (Note) -
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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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