do I connect blue and white wires to red, green, yellow, and black wires? To save money, the outer two are omitted. If you hear it, dial your primary number. Or turn off the electricity and wrap the metal of the wires around each other - this option will be easy but may be slightly unsafe and won't last if it gets knocked. If you have a room with only one phone jack but you want two-line access in that room, there's a simple remedy.
The phone company's technician will come to your house and check for service at the Network Interface Device (NID) on the side of your house. You're not done yet.
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Then, re-install the faceplate to the wall. We'll also go over adding a line to a room that currently doesn't have a phone jack, so you will be able to pick and choose where you want the second line to be located. If you need to connect the black and yellow wires, simply strip about 3/4-inch of insulation off with wire strippers, and connect them to the screw that already has the same colored "jumper" wire. Some people may say you don't need to remove the wires, but for the time it takes, it can save you some potential issues down the road. On the back of phone jacks, there are usually four connectionsone red, one green, one black, and one yellow. The steps below show you how to install a new phone jack and make sense of the color combinations. This arrangement allows most normal houses to handle two phone lines very easily. You plug the converter into the wall and the fax machine into the converter. The red and green wires are on the two center terminals of a normal phone jack, and the black and yellow wires are on the two outer terminals. Adding a second line to your home is an easy task that even the least experienced do-it-yourselfer can do without costly interference from a telephone technician. "Christmas trees and bumble bees." No, it's not a strange nursery rhyme; it's how you remember how your phone lines are distributed.