Yealink SIP-T54S Administrator's Manual page 885

Configuring Audio Features
Permitted
Parameters Default
Values
G722_1c_48, G722_1c_32, G722_1c_24, G722_1_24, G722, PCMA, PCMU, G729, G726-16,
G726-24, G726-32, G726-40, iLBC, G723_53, G723_63, opus
Default:
When audio codec is G.722_1c_48, the default value is 1;
When audio codec is G.722_1c_32, the default value is 1;
When audio codec is G.722_1c_24, the default value is 1;
When audio codec is G.722_1_24, the default value is 1;
When audio codec is G722, the default value is 1;
When audio codec is PCMU, the default value is 1;
When audio codec is PCMA, the default value is 1;
When audio codec is G729, the default value is 1;
When audio codec is G726-16, the default value is 0;
When audio codec is G726-24, the default value is 0;
When audio codec is G726-32, the default value is 0;
When audio codec is G726-40, the default value is 0;
When audio codec is iLBC, the default value is 0;
When audio codec is G723_53, the default value is 0;
When audio codec is G723_63, the default value is 0;
When audio codec is opus, the default value is 0;
Example:
account.1.codec.g722_1c_48kpbs.enable = 1
account.1.codec.g722_1c_32kpbs.enable = 1
account.1.codec.g722_1c_24kpbs.enable = 1
account.1.codec.g722_1_24kpbs.enable = 1
account.1.codec.g722.enable = 1
account.1.codec.pcmu.enable = 1
account.1.codec.pcma.enable = 1
account.1.codec.g729.enable = 1
account.1.codec.g726_16.enable = 0
account.1.codec.g726_24.enable = 0
account.1.codec.g726_32.enable = 0
account.1.codec.g726_40.enable = 0
account.1.codec.ilbc.enable = 0
account.1.codec.g723_53.enable = 0
account.1.codec.g723_63.enable = 0
account.1.codec.opus.enable = 0
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