I'm embarrassed to say that you'd be surprised how much you can get through CAT zero cable. I wired my house with D station cable, which I believe was the equivalent of CAT 1 years ago. It was a Panasonic system, so I used two pairs for each phone. Later on, the kids demanded Internet access in their rooms, so I used the green and brown pairs to emulate a 10 base-T connection and it worked amazingly well, to the extent that I was able to get about 60 Mbps with minimal issues. This was after I sent them up on a 50 pair tie cable with all of the other stuff on it to the attic and then cross-connected. I guess it's really a matter of the length that's going to determine what, if anything, can be done.

Ed Vaughn, MBSWWYPBX