Understanding Telephone Wire and Wiring Colors For Correct ...

In a typical home, the telephone cables connecting your phones within you home contain four wires... red, green, yellow and black. They are used in pairs for each phone line you have. Repairmen in fact refer to the wires in terms of "pairs", so technically a standard four wire telephone line has two pairs. LINE 1 uses the red-green pair.

Phone

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"). The second pair has one black wire ("tip") and one yellow wire ( "ring"). For a single phone line, only the green and red pair are normally used.

25

The major, or primary group of colors consists of the sequence of white, red, black, yellow, and violet. The minor, or secondary color was chosen from the sequence blue, orange, green, brown, and slate. 25-pair color coding using twisted pairs with solid color coding only, without tracers. This method was rarely used.

Telephone Wiring Diagram

Older telephone wiring was a basic Cat-3, 4 conductor or 2-pairs with red, green, black, yellow. Newer homes can have anything from Cat-3, 3-pair on up to Cat-5e, with 4-pairs, with the insulation colors being a combination of solid and solid with white for each wiring pair. The wire pair colors are blue, orange, green and brown.

Telephone Wiring Connections | DoItYourself.com

For example: colors for the main cable pair are solid blue with white stripes for first wire, and white with blue stripes for the second wire. Tip 5 – Telephone Jacks In some jacks the terminals are slotted, while in others the terminals are screw-type.

Do it yourself home telephone wiring

If you have one with the new color code the white/blue and blue/white terminals are the first phone line. 2) The second pair of terminals either yellow and black or white/orange and orange/white is the second phone line. This is only of use if you are using a 2 line telephone, and continues with the color code for 3 and 4 line phones.