Fax Servers are a pain in the A$$
BrookTrout makes by far the best fax cards but get ready to give your CFO a heart attack
We have decided to go with GFI FaxMaker for Networks and we will migrate to GFI FaxMaker for Exchange when we upgrade to Exchange 2003, have a look at this review
Looking for a Fax server for NT? How about a free one for linux and no need to worry about integrating it with windows