A telephone jack is a physical interface that connects telephone wire with the telephone. The telephone wire is connected to the back of the jack and the telephone plugs into the front of the jack. Most telephone devices can be connected only to one telephone line, although a house may be wired with up to three lines.
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Things you need
- Wire stripper
- Telephone jack
Examine the telephone wires that come out of the wall. The original colour code identifies the negative (ring) lead of line one with red wire and the positive (tip) lead of line one with green wire. The ring lead of line two uses yellow wire and the tip lead for line two uses black wire. The ring lead of line three uses blue wire and the tip lead for line three uses orange wire.
Identify telephone wires that are coloured according to the newer Cat 5e/6 standard. The ring lead of line one uses blue wire and the tip lead of line one uses white wire with a blue stripe. The ring lead of line two uses orange wire and the tip lead for line two uses white wire with an orange stripe. The ring lead of line three uses green wire and the tip lead for line three uses green wire with a white stripe.
Inspect the back of the telephone jack's faceplate. Locate the two terminals that connect to the two innermost pins of the telephone jack. Terminal A will be the terminal that connects to the left innermost pin and terminal B will be the terminal that connects to the right innermost pin.
Choose the telephone line you wish to connect your phone to. Strip half an inch of insulation from both wires for that line and loosen the terminal screws for terminals A and B. Wrap the bare end of the tip wire around the screw for terminal A and tighten the terminal screw to hold the tip wire in place. Repeat this procedure for the ring wire on terminal B.
Plug the telephone into the telephone jack and correct any connection problems until you get a dial tone. Use the long screws that came with the telephone jack to attach the jack to the wall.
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