Yealink SIP-T2 Series Administrator's Manual page 120

Administrator's Guide for SIP-T23 & T23P & T23G IP Phones
features.send_key_tone
Description:
Enables or disables the IP phone to play a tone when a user presses a send key.
0-Disabled
1-Enabled
If it is set to 1 (Enabled), the IP phone will play a tone when a user presses a send
key.
Note: It works only if the parameter "features.key_tone" is set to 1 (Enabled).
Web User Interface:
Features->Audio->Send Sound
Phone User Interface:
None
To configure a send key via web user interface:
1. Click on Features->General Information.
2. Select the desired value from the pull-down list of Key As Send.
3. Click Confirm to accept the change.
108
Parameters Permitted Values Default
0 or 1 1