Yealink T46G Administrator's Manual page 289

Parameters
Description:
Customizes the tone when the Skype for Business phone receives a voice mail.
The value format is Freq/Duration. For more information on the value format, refer to the
parameter "voice.tone.dial".
Note: It works only if the value of the parameter "voice.tone.country" is set to Custom.
Web User Interface:
Settings->Tones->Stutter
Phone User Interface:
None
voice.tone.autoanswer
Description:
Customizes the warning tone for auto answer.
The value format is Freq/Duration. For more information on the value format, refer to the
parameter "voice.tone.dial".
Note: It works only if the value of the parameter "voice.tone.country" is set to Custom.
Web User Interface:
Settings->Tones->Auto Answer
Phone User Interface:
None
To configure tones via web user interface:
Click on Settings->Tones.
1.
Select the desired value from the pull-down list of Select Country.
2.
If you select Custom, you can customize a tone for each condition of the Skype for Business
phone.
Configuring Audio Features
Permitted Values
String
Default
Blank
275