What is CAPI 2.0?
CAPI 2.0 is an interface standard between ISDN cards and ISDN software. If your ISDN card is CAPI 2.0 compliant you can use any software that is CAPI 2.0 compliant. Likewise, if your fax server software is CAPI 2.0 compliant, you can use any CAPI 2.0 ISDN fax device. CAPI 2.0 has been around for some time now and is an accepted standard for ISDN. If you wish to use ISDN, be sure to have both CAPI 2.0 compliant fax software as well as hardware.