Phone Cable Wiring Color Code
The white wire with a blue stripe is terminated on the green tip screw.
Phone cable wiring color code. Repairmen in fact refer to the wires in terms of pairs so technically a standard four wire telephone line has two pairs. First posted nov 29 2003 last update mar 15 2015. 5 memorizing the colors edit. He covers the pair colors and their positions in the jack and how to convert old wire colors to the new cat 5e colors.
Telephone wiring is color coded. The first pair has one green wire tip and one red wire ring. Color code schemes are used to identify wires within a cable. Phone wire color codes the nitty gritty.
An easy to understand explanation of the codes is also available. Red green yellow and black. The solid blue wire is the ring and gets connected to the red jack terminal. They are used in pairs for each phone line you have.
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. The blue pair is connected as the primary telephone line. The simplest color scheme is used on normal station cable what your phone tech may call jk which has only two pairs of wire. Ron discusses wiring for phone circuits and usoc wiring.
One pair of wires is used for one telephone line.