- 1). Disconnect the main telephone line. Find the telephone interface box, which is normally mounted on an outside wall where the phone line runs into your house, and unplug the telephone line from the jack. For older interface boxes without a jack, unscrew the terminals and detach the wires. Note the arrangement of wires to their corresponding terminals. If the interface box is inaccessible, take another phone on the same line off the hook to prevent it from ringing while working on it.
- 2). Locate where you want to install the new telephone jack as well as where the nearest existing jack is installed. Measure the length of wires needed to connect from the existing jack to the new phone jack. Run measuring tape along the sides of walls in exactly the same route and manner as you would run wires that would connect the existing phone jack and the new phone jack.
- 3). Buy the required length of telephone wires at your local hardware and strip the outer insulation around by a couple of inches, being careful not to nick the inner wires. Inside will be four wires: red, green, black and yellow. Cut back ½ inch to ¾ inch of the insulation around each wire.
- 4). Remove the cover of the existing jack and loosen the screws holding the wires to the terminals. Attach similar colored wires to each terminal (red to red, green to green, black to black and yellow to yellow) using your needle-nose pliers.
- 5). Run the telephone wire from the existing phone jack to the spot where you want to install the new phone jack. Fasten wires to the walls using cable staples.
- 6). Strip the outer insulation at the other end of the wire by a couple of inches, being careful not to nick any of the four inner wires. Inside will be four wires: red, green, black and yellow. Cut back ½” to ¾” of the insulation around each wire and attach similarly colored wires to each terminal (red to red, green to green, black to black and yellow to yellow) using your needle-nose pliers.
- 7). Attach the new jack to the baseboard by using a small screw or double-sided tape. (They usually come with the telephone jack.) Go to the telephone interface box and plug the jack to reconnect the telephone line.
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