Automation enthusiasts continually look for ways to make their homes more convenient, and installing additional phones is one of the ways they do it. Before getting started, map out where in the house the phone jack should be. Consider where any desks or tables might sit so that you can avoid having wires stretched to their limits or hanging between desks.
Types of Home Telephone Wiring
Telephone cable typically comes in the four-strand wire, although six-strand wire and eight-strand wire are not uncommon. The various strand types are referred to as two-pair, three-pair, and four-pair. A conventional four-strand telephone cable normally uses four colored wires in red, green, black, and yellow. These colors are the industry standard. Although most telephones use four or six contact connectors, standard telephones only use two of the wires. Single-line telephones are designed to use the two center contacts in the phone connector. On a four-contact connector, the outside two contacts are not used and on a six-contact connector, the outside four contacts are not used. This architecture is important to know when wiring the phone jack.
Installing Single or First Phone Lines
Whether you are installing a modular surface mount or flush mount jack, the wiring is the same:
Installing Second Phone Lines
Most homes are wired for two phone lines even if only one line is in use. It’s common when ordering a second phone line for the phone company to activate the second line remotely without ever coming to your home. When they do this, they are turning on your second pair (the black and yellow wires). The outside contacts in a single-line phone connector aren’t used. Two-line phones often make use of this outside contact pair so that no extra wiring is required (providing you have the black and yellow wires connected inside the jack). If you plan to use a single-line telephone for your second line then you must install a modified phone jack:.
