Phone Cable Wiring Color Code
The simplest color scheme is used on normal station cable what your phone tech may call jk which has only two pairs of wire.
Phone cable wiring color code. Ron discusses wiring for phone circuits and usoc wiring. First posted nov 29 2003 last update mar 15 2015. The solid blue wire is the ring and gets connected to the red jack terminal. In a typical home the telephone cables connecting your phones within you home contain four wires.
One pair of wires is used for one telephone line. Phone wire color codes the nitty gritty. An easy to understand explanation of the codes is also available. Repairmen in fact refer to the wires in terms of pairs so technically a standard four wire telephone line has two pairs.
Optical fiber cables use a twelve color code where the first ten are the same as in the 25 pair color code and the last two are rose and aqua. Developed in the early 1940s see note at bottom this color code uses only 10 colors divided into 5 group colors and 5 pair colors. The first pair has one green wire tip and one red wire ring. 5 memorizing the colors edit.
Red green yellow and black. Telephone wiring is color coded. Color code schemes are used to identify wires within a cable. The white wire with a blue stripe is terminated on the green tip screw.
You may encounter two different wire color schemes while working on your phone wiring.