PassFinder AP2520 VoIP Router/Gateway Operation Manual
Version 1.10 / Mar. 2002
AddPac Technology Co., Ltd.
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5.7.3.4.2.
Default Value
Enabled for all interface types.
5.7.3.4.3.
Command Mode
Voice-port configuration Mode
5.7.3.4.4.
Usage Guideline
The
echo-cancel
command enables cancellation of voice that is sent out the
interface and is received back on the same interface; sound that is received
back in this manner is perceived by the listener as an echo. Disabling echo
cancellation might cause the remote side of a connection to hear an echo.
Because echo cancellation is an invasive process that can minimally degrade
voice quality, this command should be disabled if it is not needed.
The
echo-cancel
command does not affect the echo heard by the user on
the analog side of the connection.
There is no echo path for a 4-wire ear and mouth (E&M) interface. The echo
canceller should be disabled for this interface type.
5.7.3.4.5.
Examples
The following example enables the echo cancellation feature on voice-port 3.
voice-port 3
no echo-cancel
5.7.3.5.
input gain
To configure a specific input gain value, use the
input gain
voice-port
configuration command. Use the
no
form of this command to disable the
selected amount of inserted gain.
