Yealink SIP-T3 Administrator's Manual page 194

It customizes the tone when the callee is busy.
The value format is Freq/Duration. For more information on the value format, refer to the parameter
"voice.tone.dial".
Description
Note: It works only if "voice.tone.country" is set to Custom. If you want to disable this warning tone, set
it to 0.
Permitted
String
Values
Default Blank
Web UI Settings > Tones > Busy
Parameter voice.tone.congestion
It customizes the tone when the network is congested or no available accounts (SIP account&IP call
account) on the phone.
The value format is Freq/Duration. For more information on the value format, refer to the parameter
Description
"voice.tone.dial".
Note: It works only if "voice.tone.country" is set to Custom. If you want to disable this warning tone, set
it to 0.
Permitted
String
Values
Default Blank
Web UI Settings > Tones > Congestion
Parameter features.congestion_tone.codelist
It configures the return code to play the congestion tone.
Multiple codes are separated by commas.
Example:
Description
features.congestion_tone.codelist = 403,503,603
Note: The congestion tone can be customized by "voice.tone.congestion".
Permitted
any code that the server can return
Values
Default
Blank
Parameter voice.tone.callwaiting
It customizes the call waiting tone.
The value format is Freq/Duration. For more information on the value format, refer to the parameter
Description "voice.tone.dial".
Note: It works only if "voice.tone.country" is set to Custom. If you want to disable this warning tone, set
it to 0.
Permitted
String
Values
Default Blank
Web UI Settings > Tones > Call Waiting
Parameter voice.tone.dialrecall
Description It customizes the callback tone.
<y0000000000xx>.cfg
<y0000000000xx>.cfg
<y0000000000xx>.cfg
<y0000000000xx>.cfg
Audio Features
188