Agree with pram should be relatively straightforward to set up.
I appreciate you wish to stay away rom the pc Keygrip, but I can't resist: you know windoze comes with a fax service? I use it exclusvely at work in lieu of a fax machine & find it just fine, incoming & outgoing, no problems at all. In xp, you have to enable it via control panel, add/remove programs & then it's in the add/remove windows features.