ISDN CAPI 2.0 Settings

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Fax Voip T.38 Console supports 2 different methods of fax transmission via ISDN CAPI 2.0 connection:

To select between CAPI fax and G.711fax, you should configure Fax mode in the Fax Settings (Outgoing VOIP Call Routing) or Fax Settings (Incoming VOIP Call Routing).

ISDN Username (number)

This option enables to include Calling Number (CallerID) in the CAPI 2.0 message when doing outgoing call. By default Fax Voip T.38 Console uses Default Username specified in the VOIP settings as ISDN number but you can override it in this field. On the other side, this parameter can be overwritten by the Outgoing Call Routing settings. Username consisting of letters is ignored, so digits should be used to include CallerID in the CAPI 2.0 message. Depending on the properties of your ISDN card, CallerID can be ignored and overridden. If you enter an incorrect ISDN number that does not satisfy your ISDN settings, the outgoing call can be rejected. Note that when using username consisting of letters, such error is not possible.

Use Default Username

To modify ISDN Username (number) field, uncheck this option. If this option is checked, Fax Voip T.38 Console will use the Default Username specified in the VOIP settings as ISDN Username (number).

Voice codec

CAPI 2.0 applications expect and provide voice data coded according G.711 A-law or according to G.711 u-law. Select the G.711 codec that shall be used on your system.

CAPI Profile

In this area you can view detailed information about ISDN CAPI 2.0 subsystem used on your computer. This indicator works when the Fax Voip T.38 Console Service (Fax Voip T.38 Console application) is running and Enable ISDN CAPI option is checked (see more details in the VOIP Settings chapter). The following information can be displayed: