Yealink SIP-T54S Administrator's Manual page 883

Codec
iLBC
opus
(only applicable to SIP-
T54S/T52S/T48S/T46S/T4
2S/T41S/T40P/T40G/
T27G/T23P/T23G/T21(P)
E2/T19(P) E2/CP920)
Audio Codec Configuration
Yealink IP phones running firmware version 81 or later support a new configuration behavior
for the audio codecs. It is more efficiently for you to provision a number of different IP phone
modules.
The configuration parameters are different for the new configuration behavior and the older
one.
The old configuration behavior is only applicable to the IP phones running firmware version 81
Note
or prior.
New Configuration Behavior
Procedure
Configuration changes can be performed using the following methods.
Central Provisioning
(Configuration File)
Configuration
Methods
Web User Interface
Configuration Files
Web User Interface
Configuration Files
Web User Interface
Configure the codecs to use on a per-line
basis.
Parameter:
account.X.codec.<payload_type>.enable
Configure the priority and rtpmap for the
enabled codec.
<MAC>.cfg
Parameters:
account.X.codec.<payload_type>.priority
account.X.codec.<payload_type>.rtpmap
Configure opus sample rate.
Parameter:
account.X.codec.opus.para
Configuring Audio Features
Priority RTPmap
0 106
0 107
857