Phone Cable Wiring Diagram. For all new telephone wiring projects you should use Cat 5 cable. The kind of wire shown above has recently become obsolete.
Black wire to black terminal. Collection of cat5 telephone jack wiring diagram. There may be instances where you may need to connect to or transpose from the old quad cable.
Connect the red wire or bluewhite to the red side and the green or whiteblue to the green side.
Repairmen in fact refer to the wires in terms of pairs so technically a standard four wire telephone line has two pairs. This is a gray or tan box that measures roughly 8 inches by 12 inches. Repairmen in fact refer to the wires in terms of pairs so technically a standard four wire telephone line has two pairs. If you have a newer connecting box I beleive they are called R66 Connecting Block or a 2 Pair Connecting Block just find an empty pair of screws and connect the wires in.