If that network outlet is twisted pair / RJ45, can you patch in the phone cord at the end?

Funny, I did more or less just this (stole a spare pair for the TiVo's phone)

Of course all the wiring in my house was cat5 and I have magic cables to "bridge" some cable runs into the phone system.

If I had to do it again I'd get a TiVoNet (which I have in my "spare tivo"), and I may yet free up that one and put a turbonet or airnet in my "spare".