Yealink SIP-T21 E2 Administrator's Guide

Configuring Audio Features
857
Codec
Configuration
Methods
Priority
RTPmap
Web User Interface
iLBC
Configuration Files
Web User Interface
0
106
opus
(only applicable to SIP-
T54S/T52S/T48S/T46S/T4
2S/T41S/T40P/T40G/
T27G/T23P/T23G/T21(P)
E2/T19(P) E2/CP920)
Configuration Files
Web User Interface
0
107
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.
Note
New Configuration Behavior
Procedure
Configuration changes can be performed using the following methods.
Central Provisioning
(Configuration File)
<MAC>.cfg
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.
Parameters:
account.X.codec.<payload_type>.priority
account.X.codec.<payload_type>.rtpmap
Configure opus sample rate.
Parameter:
account.X.codec.opus.para
The old configuration behavior is only applicable to the IP phones running firmware version 81
or prior.

Yealink SIP-T21 E2 Specifications

General

Brand	Yealink
Model	SIP-T21 E2
Category	IP Phone
Language	English