Hi guys Is it possible to have 4 phone lines using 1 cat6 cable? Basically I want to use 4 Rj11 plugs on one side of the cable and 4Rj11 box with jacks at the other end of the cable (so I can extend from a box to an actual phone) I believe only 2 wires are needed for a phone line and the contacts on the Rj11 are the 2 middle ones. Is that correct?