Yealink SIP-T48G Administrator's Manual page 694

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
Details of Configuration Parameters:
Parameters
voice.tone.country
Description:
Configures the country tone for the IP phone.
Permitted Values:
Custom, Australia, Austria, Brazil, Belgium, Chile, China, Czech, Czech ETSI,
Denmark, Finland, France, Germany, Great Britain, Greece, Hungary, Lithuania,
India, Italy, Japan, Mexico, New Zealand, Netherlands, Norway, Portugal, Spain,
Switzerland, Sweden, Russia, United States.
Example:
voice.tone.country = Custom
Web User Interface:
Settings->Tones->Select Country
Phone User Interface:
None
voice.tone.dial
Description:
Customizes the dial tone.
tonelist = element[,element] [,element]...
Where
element = [!]Freq1[+Freq2][+Freq3][+Freq4] /Duration
Freq: the frequency of the tone (ranges from 200 to 4000Hz). If it is set to 0Hz, it
means the tone is not played.
For SIP-T40P/T23P/T23G/T21(P) E2/T19(P) E2:
A tone is comprised of at most two different frequencies.
For SIP-T48G/T46G/T42G/T41P/T29G/T27P/CP860:
A tone is comprised of at most four different frequencies.
Duration: the duration (in milliseconds) of the dial tone, ranges from 0 to 30000ms.
You can configure at most eight different tones for one condition, and separate them
by commas. (e.g., 250/200,0/1000,200+300/500,200+500+800+1500/1000).
If you want the IP phone to play tones once, add an exclamation mark "!" before
tones (e.g., !250/200,0/1000,200+300/500,200+500+800+1500/1000).
674
et?p=settings-tones&q=load
Permitted Values
Refer to the following content
String
Default
Custom
Blank