The MDF Jumpering is the physical connection between the service provider network and the internal phone network of the customers via a cable that is known as a jumper wire. The jumper connects. As mentioned before, a jumper is a conductor that is used to connect two or more points in an electrical circuit. [1m:13s] If jumpers were unavailable, you could simply use a wire to make the same kind of. By installing accessories, the distribution frame can fully meet the needs of UTP, STP, coaxial cable, optical fiber, audio and video. The distribution frames commonly used in network engineering include twisted pair distribution frames and fiber optic distribution frames. They are designed to provide temporary or semi-permanent connections.