call sign

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call sign

[′kȯl ‚sīn]

Call Sign


a set of characters (code symbols, letters, or numbers) or an audible signal (word, musical phrase, bird call) that serves as the distinctive sign of a radio station—usually for the purpose of identification of the station during reception. As a rule, it is transmitted at the beginning of each period of the station’s operation.

The set of symbols in a call sign identifies the station’s national affiliation. The initial characters are established by the International Radio Regulations. The USSR, for example, uses in this position the letters U and R and such combinations as 4J, 4K, and 4L. The complete structure of a call sign depends on the class (purpose) of a station and differs for broadcasting, official, and amateur radio stations. Call signs for amateur radio stations have a complicated makeup and contain the most information. They often indicate through a code the station’s operating wave band (shortwave or ultrashortwave), the station’s group (a collective or individual station) and site (in the USSR—the Union republic, oblast, and amateur-radio region), and the individual letter symbol or registration number of the station.


call sign

Any combination of characters or pronounceable words used primarily for establishing and maintaining communications. It identifies a communication facility, a command, an authority, an activity, or a unit. A call sign should have at least two syllables (e.g., Red 1, Pan Am 550).
References in periodicals archive ?
King revealed that former Reading striker Darius Henderson, who left the Madejski four years ago, recognised the home defenders' call signal to clear the box at set-pieces to catch Watford offside.
The system responds to incoming call signals, such as alert signals, from the transceiver and rings the telephone accordingly.
The ground radio stations direct call signals received from the aircraft to the public telephone network.
CommuniGate Pro automatically provides registry services for millions of VoIP users, SIP proxy services for thousands of call signals per second, and extensive near-end and far-end NAT traversal services previously only provided through complex architectures or expensive hardware solutions.
The system includes the ability to respond to incoming call signals, such as alert signals, from the transceiver and ring the telephone-type devices accordingly.
A "mew" call signals a dispute and requires support from a mate.
Inaugural Transatlantic lightRadio Call Signals Next-generation Mobile Networks
The increase is due to the availability in the au service of songs by popular singers as call signals and of low-priced handsets with built-in cameras, a KDDI official said.
Royalties for use of the copyrights for call signals with melodies in fiscal 2000 hit 1.
The Shofar's call signals our recommitment to our Creator and to each other.