Yealink SIP-T48G Administrator's Manual page 308

Administrator's Guide for SIP-T2_Series_T4_Series IP Phones
Parameters
voice.tone.busy
Description:
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".
Note: It works only if the parameter "voice.tone.country" is set to Custom.
Web User Interface:
Settings->Tones->Busy
Phone User Interface:
None
voice.tone.congestion
Description:
Customizes the tone when the network is congested.
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 parameter "voice.tone.country" is set to Custom.
Web User Interface:
Settings->Tones->Congestion
Phone User Interface:
None
voice.tone.callwaiting
Description:
Customizes the call waiting tone.
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 parameter "voice.tone.country" is set to Custom.
Web User Interface:
Settings->Tones->Call Waiting
Phone User Interface:
None
voice.tone.dialrecall
294
Permitted Values
String
String
String
String
Default
Blank
Blank
Blank
Blank