The sending of radio waves from one place to another has nothing to do with the presence or absence of an atmosphere between the 2. Radio waves journey by way of a perfect vacuum just as easily as they travel by way of air, fog, clouds, or any other kind of gas. Telecommunications during which multiple transmitters and multiple receivers have been designed to cooperate and to share the identical bodily channel are known as multiplex techniques. The sharing of bodily channels using multiplexing often gives very large reductions in prices. Multiplexed techniques are specified by Telecommunication networks, and the multiplexed signals are switched at nodes through to the right vacation spot terminal receiver.