I just read the linked article, and it is a wonderful resource.

The only "bad" thing about it is that it conveyed some information that I did not want to hear! My house was built in 1993, and I am stuck with quad wiring. I would really like to pull Cat 5 cable through to replace it, but I do not think that is practical right now.

By appearance, a quad wire jacket was run from each jack down to the network box, and the bundles of wire from each jacket were segregated so that a red-green pair was attached to one terminal, and a black yellow pair was connected to the other terminal. Several years ago, I ran a seperate quad bundle with a weatherproof jacket on it so that it could be buried and run along the outside of my house to the living room where my directv box is located. This means there are a nice bunch of same- colored wires attached to each terminal. Virtually every room in the house has a phone jack, but not all have been used.

I skimmed the article, and have not read it throughly. I will do so before really trying to diagnose anything.