Method of converging an echo canceller
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United States of America Patent
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Jan 10, 1995
Grant Date -
N/A
app pub date -
Jun 23, 1993
filing date -
Nov 4, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Converging of an echo canceller (4A-D) integrated into a telephone exchange (1, 2) is initiated at the start of a telephone call by an internal command of the telephone exchange given by a call control (2) of the telephone exchange as soon as the call control (2) has observed an off-hook state of a called subscriber connection. The command causes the echo canceller (4A-D) to transmit a test signal to the echo path for converging the echo canceller before appearance of the speech signal.
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