CAT5 cable consists of an insulated cable carrying four sets of twisted pair son - son eight in all. It is commonly used for computer networks and connections increasingly common in home telephone cables and other applications, as it provides additional capacity beyond what a telephone line has two single son. When CAT5 cabling is used in the construction or renovation, the process of adding second telephones and other services is greatly simplified.
Things you need
cutters / strippers
Strip the outer sheath CAT5 cable, so that the four twisted pairs of son inside are exposed. Remove about one to two inches of the sheath with a crimping tool.
Your telephone connection only requires two son, to select two son to use the telephone line. Conventions harden the appropriate son to use are:
For a main line - orange and orange / white
For a second line - blue and blue / white
It should be noted, however, that the real son used are not important as long as you are consistent. In other words, make sure to connect the son of the same color on both ends of your circuit.
Open your telephone wall plate of the phone jack. Use a screwdriver in both cases, turning the mounting screws on the face to the left to loosen.
Remove about 3/8 inch of insulation from both ends of the son you have chosen to connect to the phone jack. You will find two screws into the telephone jack - loosen by turning to the left, and drag a wire under each screw. Tighten the screws down, and replace the cover of the wall plate of the phone or the cover of the jack.
At the terminus of the phone junction box outside your house, remove the cover by turning the screw on the lid to the left. You will find two screws, similar to those in wall plates inside your home. Loosen them and slide the son stripped at the other end of your CAT5 cable under the screws. Replace cover.
Plug your phone into a wall outlet or modular jack and listen for a dial tone. If you do not hear one, check the wiring colors and connections on both ends of the circuit.