Wire Color Codes - Home Phone Wiring Color code schemes are used to identify wires within a cable. You may encounter two different wire color schemes while working on your phone wiring. The simplest color scheme is used on normal station cable (what your phone tech may call "JK"), which has only two pairs of wire. The first pair has one green wire ("tip") and one red wire ("ring"). Do it yourself home telephone wiring. Standard Telephone Wiring Color Code. There is a possibility of two color codes that you may find in your home, I will cover both of them but only up to a 4 pair cable which consists of 8 conductors. The cable in your home may consist of only 2 pairs, 3 pairs or may be a 4 pair cable.