Would someone explain whether using two pairs (four cables) stripped out of CAT 5, as opposed to one pair (2 single cables) for DSL connection, (from the box on the house to home, essentially replacing old CAT 3) would be better? In other words, if not better, what are the pottential problems? I started doing some research and ran into a lot of different terminologies such as:
resistance impedance cable type cable diameter voltage current skin effect coax copper
and few others, and at the end I've read that at high frequencies cables behave totally differently.. So, I'm looking for a electrical engineer or perhaps physicist, or some other amateur cable expert who could lend me a hand and explain in some detail.
EDIT: Little more explanation as I understand it's confusing: Connecting end to end with four cables, to draw an analogy: let's say you're connecting a voltage socket (120V with just two wires - live and neutral) and instead of using one for live and one for neutral, you use two for live wire and two for neutral, essentially doubling each. Now I think what happened, someone (not me) just twisted them at each end. So instead of taking two single wires out of CAT 5 cable, he took four (as there's eight total inside) and used it. It works, but is it better, worse?
From what I've read thicker copper cable has less resistance so it would be better, but if he twisted only the ends, not sure if it's better at this point..