How Does
How Does a Wireless Telephone-Jack System Work?
Base Units
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When you plug a phone line into the phone jack--and run the other end to the base unit of a wireless telephone jack system--the base unit taps into the phone line's circuit. Voice is sent and received along the circuit in the form of fluctuating electrical pulses. The electrical pulses passing along a phone's circuits are tapped into by the wireless jack system. With a phone line running from the phone jack to the base unit, the unit amplifies and relays the current.
Radio Frequency (RF)
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In RF systems, the electrical currents from the phone line are amplified and converted into radio signal. The device's radio signal is dictated by the strength of the electric current that it receives from the phone line. The remote receives the fluctuating signal of the base unit and reverses the operation--turning the radio signal pulses back into electric pulses to be passed along a phone circuit. Sending and receiving for both the base and remote unit only requires that the devices reverse their functions. Both units can send and receive radio signals as well as convert electrical pulses.
Powerline
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Other units may expand your phone range by relaying voice and data via your building's power lines. Power is passed between the base unit and the remote unit via your house or office electrical lines. The units amplify and reproduce the unique current signatures created between the phone line and the remote phone. The units pass encrypted signal along the power lines. This allows you to plug the base and remote units anywhere on the same circuit and in range of each other.
eHow Article: How Does a Wireless Telephone-Jack System Work?
