20 to 50Hz.
The default setting is 25Hz.
International busy tone setting & User
’s busy tone parameter setting
User can choose the living country from country selection list to get the familiar
busy tone. When user can’t find the living country from the list, user can configure
the busy tone parameters themselves if they know the appropriate setting. Then
click OK. It is not necessary for user to change this setting for general application.
This feature also allows user to set the appropriate settings of busy tone when
SkyATA is connected with one PBX for different application. By selecting a
country, the device will activate the specific busy tone frequency and cycle
adopted by local Public Switched Telephone Networks in that country.
Sometimes, the connecting PBX doesn't have the exact busy tone parameter as
defined in user's country. For this case, user might encounter busy tone detection
and unfamiliar busy tone problems even selecting user's country. User can
configure the busy tone parameters themselves if they know the appropriate
setting. Enable user's busy tone parameter setting option as below figure and fill
in appropriate parameters and then click OK. The parameter will be saved and
active.
The default international busy tone country setting is United States. SkyATA
supports busy tone for most countries now.