I think this sounds like a service from some Telco that lets you send faxes from the web, but that's how we were able to name it at the time I wrote that back in 2003 when I was working for FrontSITE -- a free-software services and support company, Turkey branch dead around November 2004 I guess but they're still pretty much active in Germany apparently.
WebFax is a web/PHP frontend to most of what Hylafax provides and to some other stuff it lacks. It was working in a customer's site for the last couple years with almost no hassle, and I recovered the old codebase from their ages-old Debian Woody server (that was working very well too, until its disk gone nuts recently) and refactored it a little bit.
Happy hacking, good night. I'll blog more soon, I promise, there's a lot more than that.