The connection between the PBX system and the Server may be established using an ISDN B-Channel connection.
Connection using an ISDN controller:
If an ISDN controller should be used, it must offer a capi2032.dll (the file should be normally located in the Windows® System directory). You may use every conventional ISDN controller (e.g. AVM Fritz, Eicon Diehl Diva Pro). The default ISDN-Number is 333. The number is individually configured in each PBX system. Using the advanced settings, you may choose the capi2032.dll and the controller to use if you have multiple ISDN controllers installed.