Yealink SIP-T2 SERIES Administrator's Manual page 831

Acoustic Echo Cancellation (AEC) is used to reduce acoustic echo from a voice call to
provide natural full-duplex communication patterns. It also increases the capacity
achieved through silence suppression by preventing echo from traveling across a
network. IP phones employ advanced AEC for hands-free operation. AEC is not
normally required for calls via the handset. In certain situation, where echo is
experienced by the remote party, AEC may be used to reduce/avoid echo when the
user uses the handset.
Note
Utilizing acoustic echo cancellation will introduce a small delay increase into audio path
which might cause a lower voice quality.
Procedure
AEC can be configured using the configuration files or locally.
Configuration File
Local
<y0000000000xx>.cfg
Web User Interface
Configuring Audio Features
Configure AEC.
Parameter:
voice.echo_cancellation
Configure AEC.
Navigate to:
For
SIP-T48G/T46G/T42G/T41P/
T40P/T29G/T27P/T23P/T23
G/T21(P) E2/T19(P)
E2/CP860:
http://<phoneIPAddress>/
servlet?p=settings-voice&
q=load
For SIP VP-T49G:
http://<phoneIPAddress>/
servlet?m=mod_data&p
=settings-voice&q=load
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