Yealink SIP-T2xP Administrator's Manual page 408

Administrator's Guide for SIP-T2xP and SIP-T19P IP Phones
Example
Parameter-
account.X.codec.Y.payload_type
Description
Format
Default Value
Range
392
1-Enabled
account.1.codec.1.enable = 1
Configuration File
<MAC>.cfg
Configures the codec for account X to use.
X ranges from 1 to 6.
Y ranges from 1 to 11.
String
For SIP-T20P/T22P/T26P/T28P IP phones:
When Y=1, the default value is PCMU;
When Y=2, the default value is PCMA;
When Y=3, the default value is G723_53;
When Y=4, the default value is G723_63;
When Y=5, the default value is G729;
When Y=6, the default value is G722;
When Y=7, the default value is iLBC;
When Y=8, the default value is G726-16;
When Y=9, the default value is G726-24;
When Y=10, the default value is G726-32;
When Y=11, the default value is G726-40.
For SIP-T19P/T21P IP phones:
When Y=1, the default value is PCMU;
When Y=2, the default value is PCMA;
When Y=3, the default value is G723_53;
When Y=4, the default value is G723_63;
When Y=5, the default value is G729;
When Y=6, the default value is G722;
When Y=7, the default value is iLBC;
When Y=8, the default value is G726-32.
Valid values are:
PCMU
PCMA
G729
G722
G723_53