My son recently moved into a house, and he wanted to have a particular wired phone base station in his office. The problem is that there is no telephone jack in this room. To avoid the hassle of running a telephone wire to the room (or paying the telephone company $140 to install it), he decided to use a device (Southwestern Bell Wireless Phone Jack) that uses the electrical wires in the home to deliver the telephone signals. He connects the existing phone jack (in a different room) to a device that plugs into a nearby AC outlet. He then connects the phone base station to another small device that plugs into an AC outlet in his office. These types of devices modulate a low frequency carrier signal similar to modems in computers in order to carry the telephone signals through the electrical wiring, and for $70 it's much easier than running wire. This quasi-wireless solution enables throughput of about 56Kbps for even networking computers together.

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