Ask Slashdot: Linux Fax Servers w/ WinTel Clients?

JimMcc asks: "We are planning a new network installation with a Linux server running Samba and WinTel clients. One of the issues yet to be resolved is providing the users the ability to fax directly. We would like to offer a solution which provides shared fax modem(s) accessed through the network instead of a fax modem / analog line per user. The customer is a non-profit and is cost sensitive. Has anybody heard of a possible solution? Thank you for any pointers/ideas you may have. "