|I know this is old, but I figured I might as well post for posterity...My house has the same thing, cat5e cables for telephone lines. I didn't need all the telephone jacks, and I'd rather have cordless phones than a wireless network, so I converted most of the jacks to be used for networking. |
I went into the panel where the security, cable, and phone lines all meet, cut the phone ones I wanted to hijack, terminated them with regular network plugs, and plugged them all into a switch. It was easy (assuming your wires are marked so you can tell which one goes to which jack) and it works great.
You might also try changing the channel on your wireless router to get a better signal. I find that in some places there's a lot of interference from neighbors or whatever and changing the channel helps dramatically.