Line 1 is the center pair: Some premade phone cables only have the center two wires. These cables will be absolutely useless for two line devices. Nowadays, Cat5 cable is commonly used instead of station wire for telephony.

Network Wiring Instructions

In which case, start with the blue pairs and use the orange pairs for the second line. You may find that wires with both color schemes have been used in your installation. Use the table below to translate between the two schemes. I strip about 1" of jacket off, then separate the wires in order, pinching firmly between thumb and finger, while bending back and forth and mashing. There are two wiring standards for these cables, called "TA" and TB" They differ only in connection sequence, not in use of the various colors.

The wall jack may be wired in a different sequence because the wires may be crossed inside the jack.

Telephone and Data Wire Color Codes

This will insure compliance with Ethernet wiring standards. Specification TB. Crossover Cable Some applications may require a crossover cable. The most common use of a crossover cable occurs in wiring together two Hubs. Pins 1 and 3 are crossed over, and Pins 2 and 6 are crossed over. Punchdowns are made with the pairs in order with the white-stripe wire first, then the colored wire.

Doing your own telephone wiring

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Data & Telephone wiring standards

Learn more Choose a spot for the new phone jack. Assess your room and think about the best path for the phone wires. If you need a new phone jack on the opposite side of the room from your existing jack, will it be possible to run the wires along your baseboards? Figure out how much new wire you need.

Measure the distance from the old jack to the spot where the new one will be installed. Include the entire path that the telephone wire will travel: Go to the hardware store and purchase the amount of wire you will need. If your new jack is going to be located several feet from the old one, you should also buy fasteners that are made for keeping the wire in place along walls and baseboards.

Replacing a Phone Jack

Choose a new jack. These types of jacks are simply affixed to your baseboard or wall, with minimal drilling required. Affix the new jack to the spot you have chosen. Some jacks come with adhesive backing and simple mounting instructions. Others may need to be screwed into the wall. Depending on the type of wall you have, this may be accomplished either with a screwdriver and a bit of muscle or with a small drill. Ensure that your jack is not installed at a crooked angle by using a level to help you line up the jack with your floor or baseboard.

Attach telephone wire to the old jack. Open the casing, or unscrew the plating, on the old jack.

Loosen the screws that secure the red, green, yellow and black telephone wires. As necessary, trim damage from the old wires and strip the insulation from the tips. Strip the insulation from the tips of the new wires, too. Twist the tips of the new wires with the tips of the old wires according to color: Replace the twisted portions of the wires under the screws in the jack, and tighten the screws.

Thread the new wire through the hole in the phone jack casing, and screw the casing back to the wall.

Run the wire from the old jack to the new jack. Using the path you mapped out in your original plan, run the new wire to the new jack. If you are running the wire along baseboards or up walls, use the fasteners you bought at the hardware store to secure it neatly in place. Attach telephone wire to the new jack. Strip the insulation from the tips of the four wires.

Loosen the screws on the back of the new jack, and affix the red, green, yellow, and black wires in their correct color-coded places. Tighten the screws. Finish installing the new jack. Place the cover on the jack and screw it on. Reconnect the phone line and test your work. Return to the NID box and reconnect your phone line. Go back inside and test it by plugging in your phone or DSL cable. If you have a dial tone and your internet works, your task is complete. For example, if your old jack is a standard rectangular wall plate, it will be easiest to install a new jack that looks very similar.

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If you plan to attach your telephone to the wall, make sure you buy a wall mount jack, rather than a flush jack.