Though four wires are typically used in U.S. phone cabling, only two are necessary for telecommunication. In the event that a second line is needed, the other two are used.

How many wires does a phone jack have?

four wires In a typical home, the telephone cables connecting your phones within you home contain four wires red, green, yellow and black. They are used in pairs for each phone line you have. Repairmen in fact refer to the wires in terms of pairs, so technically a standard four wire telephone line has two pairs.

Can I cut the wires to my phone jack?

A: Cable and phone wires dont carry current, so its safe to remove them. However, its critical not to cut into a power line, as you know. “If wires are coming in off a pole, the very top wires are Pepcos,” she said.