The transmission of speech by means of modulated radio waves. [JP 1-02]

A teletypewriter employed in a communication system using radio circuits.
Note: Such systems are spoken of as RATT systems.

A device or functionality that terminates radio transmissions, performs radio channel management, provides rate adaptation between the radio channel and the user channel and provides mobility management functions. [T1.702-1995] [Tl.705]

Synonym area broadcast shift.

An electromagnetic wave of a frequency arbitrarily lower than 3000 GHz. Synonym Hertzian wave.

A diagram that shows the area within which a radio station is broadcasting an effective signal strength in relation to a given standard.
Note: An example of a radio-coverage diagram is a polar plot, in each direction from the antenna, of the distance from the antenna at which the signal strength is equal to a specified value, i.e., it is… (Read More →)

See radio and wire integration.

A station in the radionavigation service the emissions of which are intended to enable a mobile station to determine its bearing or direction in relation to the radiobeacon station. [NTIA] [RR]

Telecommunication by means of radio waves. [NTIA] [RR] [47CFR]

A service as defined in this Section [of the Radio Regulations] involving the transmission, emission and/or reception of radio waves for specific telecommunication purposes. In these regulations, unless otherwise stated, any radiocommunication service relates to terrestrial radiocommunication. [NTIA] [RR]