Telephone Socket Wiring Colors

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Upon opening a telephone wall socket or cable, you will find various colored wiring. Identifying the different types of wire appears it would be a simple task, but dissimilar wiring standards and multiple lines can complicate the process. A telephone socket may use four solid colors that prove relatively easy to differentiate, while others have less easily distinguished wires with stripes. The type of wire may differ depending upon whether a specific color acts as the stripe or the main--or primary--color.

Main Colors

  • A telephone socket typically contains at least two sets of wires. Every separate phone line/number uses two strands of wire to carry the audio, ring signals and power, according to AbleComm. Some sockets have more wires--and colors--to accommodate additional lines. In each set of two wires, one is termed the "ring" while the other is known as the "tip." Many telephone jacks have green and black "tip" wiring, with red and yellow "ring" wires, according to HomePhoneWiring.com. The green and red wires go together and connect to the first line.

More Colors

  • The telephone socket may use a different set of colors or have additional colors for three to four lines. For example, AbleComm says one pair of wires might be orange and white while the other set is blue and white. Others use stripes to differentiate "ring" and "tip" wiring, such as a blue wire matched with a blue-striped white wire. An orange-striped white wire is a "tip" and a white-striped blue wire or a white-striped orange wire is a "ring," HomePhoneWiring.com states.

More Lines

  • A telephone socket containing many lines may resort to using additional colors like purple, gray or brown to differentiate the wiring. HomePhoneWiring.com indicates that up to 25 sets--50 wires total--may be identified using different color combinations, although most socket types contain no more than four. In some cases, different groups of telephone socket wiring colors exist within the same building, especially if the cables were installed years apart.

Power

  • Telephone socket wiring provides power to operate phones which do not connect to separate AC power sources. The yellow and black (or white/orange and orange) wires deliver a small amount of electricity, according to Tech-FAQ.com. The same proves true for any other set of two matching wires, like red and green. The electrical current is supplied at approximately 5 volts. This voltage level equals slightly more than that produced by three "AA" batteries.

References

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