You can use ShareISDN to share the functions of an ISDN-Card with other users in a network. For example, every person within a company can send faxes, transfer files or access the Internet via one single ISDN-Card. Installing an ISDN-Card in every single computer of a network would give the same result but of course this would be much more expensive and requires a lot more effort (installing the cards, laying cables, etc).
Simply install the ShareISDN Server (SISsetNT.exe for WindowsNT/2000, SISset95.exe for Windows95/98/MI) on the computer with the ISDN-Card. The ShareISDN Client (SICsetup.exe) is put on every computer to access the ISDN-Card of the Server computer.
You can use nearly every application which supports the CAPI 2.0 specification. CAPI 2.0 is the standard programming interface for ISDN-Cards and nearly all ISDN applications support it. For e...