Well, that depends. If you're referring to simply putting plugs on the ends of CAT-5 cable, then you will suffer poor signal quality.

However, as is done on lond-line data links, with the proper tranceivers, signals can indeed travel over twisted-pair wiring with little signal degradation.

Those of us with DSL computer service are living proof. These signals can travel over miles of wire pairs.

Larry
www.fineelectricco.com