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echo-cancel enable
echo-cancel enable
4-22
To enable the echo cancel feature, use the echo-cancel enable voice-port configuration command.
Use the no form of this command to disable this feature.
echo-cancel enable
no echo-cancel enable
Syntax Description
This command has no arguments or keywords.
Default
The default value for this command is enabled for all interface types.
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
The echo-cancel command enables cancellation of voice that is sent out the interface and is received
back on the same interface. 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 E&M interface. The echo canceller should be disabled for that
interface type.
Note This command is valid only if the echo-cancel coverage command has been configured. For
more information, refer to the echo-cancel coverage command.
Example
The following example enables the echo cancel feature for 16-millisecond echo coverage:
voice-port 1/0/0
echo-cancel enable
echo-cancel coverage 16
Related Commands
You can use the master index or search online to find documentation of related commands.
echo-cancel coverage
non-linear
Voice over IP for the Cisco 3600 Series Software Configuration Guide