Yealink SIP-T54S Administrator's Manual page 891

To adjust the priority of codecs, select the desired codec and then click
6.
Click Confirm to accept the change.
7.
To configure the opus sample rate via web user interface (take SIP-T54S IP phones for
example:
Click on Account->Codec.
1.
Select the desired value from the pull-down list of Opus Sample Rate.
2.
Click Confirm to accept the change.
3.
Configuring Audio Features
or .
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