What do the yellow and black wires in a home telephone It only takes two wires to connect a phone, but most house wiring contains four wires. The red and green wires are on the two center terminals of a normal phone jack, and the black and yellow wires are on the two outer terminals. This arrangement allows most normal houses to handle two phone linesAuthor: Howstuffworks Contributors What do all the wire colors mean? - Home Phone Wiring Blue Orange Green Brown Slate White Red Black Yellow Violet What do all the wire colors mean? Two wires (normally referred to as a "pair") are needed for most telephone connections. One of the wires in a pair is referred to as the "tip" and the other is called the "ring". Color code schemes are used to identify wires within a cable.
Related with telephone wiring black yellow red green