Yealink T21PE2 - DSS Keys; Supported DSS Keys

Phone Customization
157
Permitted
Values
0-Disabled
1-Enabled
Default 1
Parameter features.headset_mode.enable <y0000000000xx>.cfg
Description
It enables or disables the phone’s headset mode.
Note: It is not applicable to CP920 IP phones.
Permitted
Values
0-Disabled
1-Enabled
Default 1
Parameter phone_setting.headsetkey_mode <y0000000000xx>.cfg
Description
It configures headset mode precedence during a call.
Note: It is not applicable to CP920 IP phones.
Permitted
Values
0-Always use (pressing the Speakerphone key and picking up the handset are not effective when the
headset mode is activated)
1-Use as normal
Default 1
DSS Keys
There are three kinds of DSS keys: Line Keys, Programmable Keys and Ext Keys. You can assign various functions to DSS
keys. This section explains how to set these keys.
Line key is not applicable to T19(P) E2/CP920 IP phones, ext key is only applicable to expansion modules connected to
T54S/T52S/T48S/T48G/T46S/T46G/T29G/T27G IP phones.
Note
If the phone is downgraded to an earlier firmware from firmware version 83, the DSS key configuration will be reset after
downgrading.
Topics
Supported DSS Keys
Supported Dsskey Types
Line Keys
Programmable Keys
Ext Keys
Supported DSS Keys
The following table lists the number of DSS keys you can configure for each phone model:
Phone Model Line Keys Programmable Keys Ext Keys
T54S 27 15 60
T52S 21 13 60
T48G/S 29 15 40