The common boundary between a mobile station and the radio equipment in the network, which is the boundary defined by functional characteristics, physical interconnection characteristics, signal characteristics, and other characteristics as appropriate.

1. An organization of radio stations that is capable of direct communication on a common frequency.
2. An organization of radio stations that broadcast common programming, not necessarily simultaneously, at different frequencies from different locations.

The use of a pocket-size radio receiver capable of alerting its wearer that there is a phone call, either from a displayed phone number or to a predesignated number.
Note: Radio paging may be considered a subset of paging. Synonym beeping.

A light-weight, pocket-size portable radio terminal (or "personal terminal") providing the capability for the user to be either stationary or in motion while accessing and using telecommunication services. [T1.244-1995] Synonym [loosely] brick.

A unit that supports transmission of signals over the air interface. [After T
1. Rpt34-1994]

A controller that provides an interface between one or more subtending radio port intermediaries and a PCS switching center, and supports air interface independent radio frequency transmission and reception functions. [After T
1. Rpt34-1994]

1. The distance from a transmitter at which the signal strength remains above the minimum usable level for a particular antenna and receiver combination.
2. A radio aid to air navigation that creates an infinite number of paths in space throughout a given sector or azimuth angle by various methods of transmission and reception of electromagnetic waves. [From Weik '89]

A radionavigation land station in the aeronautical radionavigation service providing radial equisignal zones. (In certain instances a radio range station may be placed on board a ship. ) [NTIA]

See identification, friend or foe.

As used in legal documents, the latest (i.e., as of the document date) ITU Radio Regulations to which the United States is a party.