Car wiring diagrams: 2 Line Phone Wiring Wiring Diagram, wiring diagram, wire wiring harness, schematic circuit diagram, wiring diagran, wireing diagram, wirring diagram, wiring daigram, wiring diagrams. Note this page describes the phone wiring conventions in the United States. I m not Diagram showing how to convert a line jack to a line jack. Note that .The RJ wires and is used to handle lines, or line phones. wires of your POTS line is called the tip wire and the other is the ring wire see chart ..Telephone wiring for a phone outlet is typically either , or pairs , , or conductor . The diagram below provides the transposition between these standards. A standard single line phone draws dial tone from these center pins..