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Selective calling

Index Selective calling

In a conventional, analog two-way radio system, a standard radio has ''noise squelch'' or ''carrier squelch'', which allows a radio to receive all transmissions. [1]

33 relations: Base station, Baud, California, Computer-aided dispatch, Continuous Tone-Coded Squelch System, Data, Digital data, Diversity combining, Dual-tone multi-frequency signaling, Emergency!, Falsing, Federal Communications Commission, Frequency-shift keying, General Electric, Hertz, Human spaceflight, Light-emitting diode, Los Angeles County Fire Department, Mobile radio, Motorola, Octal, Pitch (music), Radio repeater, Reset (computing), Selcall, Siren (alarm), Squelch, Stream, Time-division multiple access, Trademark, Trunked radio system, Two-way radio, Window function.

Base station

Base station (or base radio station) is – according to the International Telecommunication Union's (ITU) Radio Regulations (RR) – a "land station in the land mobile service." The term is used in the context of mobile telephony, wireless computer networking and other wireless communications and in land surveying.

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Baud

In telecommunication and electronics, baud (symbol: Bd) is a common measure of the speed of communication over a data channel.

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California

California is a state in the Pacific Region of the United States.

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Computer-aided dispatch

Computer-aided dispatch (CAD), also called computer-assisted dispatch, is a method of dispatching taxicabs, couriers, field service technicians, mass transit vehicles or emergency services assisted by computer.

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Continuous Tone-Coded Squelch System

In telecommunications, Continuous Tone-Coded Squelch System or CTCSS is a circuit that is used to reduce the annoyance of listening to other users on a shared two-way radio communications channel.

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Data

Data is a set of values of qualitative or quantitative variables.

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Digital data

Digital data, in information theory and information systems, is the discrete, discontinuous representation of information or works.

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Diversity combining

Diversity combining is the technique applied to combine the multiple received signals of a diversity reception device into a single improved signal.

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Dual-tone multi-frequency signaling

Dual-tone multi-frequency signaling (DTMF) is an in-band telecommunication signaling system using the voice-frequency band over telephone lines between telephone equipment and other communications devices and switching centers.

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Emergency!

Emergency! is an American television series that combines the medical drama and action-adventure genres.

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Falsing

In telecommunications, falsing is when a decoder assumes that it is detecting a valid input even though one is not present.

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Federal Communications Commission

The Federal Communications Commission (FCC) is an independent agency of the United States government created by statute (and) to regulate interstate communications by radio, television, wire, satellite, and cable.

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Frequency-shift keying

Frequency-shift keying (FSK) is a frequency modulation scheme in which digital information is transmitted through discrete frequency changes of a carrier signal.

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General Electric

General Electric Company (GE) is an American multinational conglomerate incorporated in New York and headquartered in Boston, Massachusetts.

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Hertz

The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second.

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Human spaceflight

Human spaceflight (also referred to as crewed spaceflight or manned spaceflight) is space travel with a crew or passengers aboard the spacecraft.

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Light-emitting diode

A light-emitting diode (LED) is a two-lead semiconductor light source.

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Los Angeles County Fire Department

The Los Angeles County Fire Department (LACoFD) provides fire protection and emergency medical services for the unincorporated parts of Los Angeles County, California, as well as 59 cities, including the city of La Habra which is located in Orange County and is the first city outside of Los Angeles County to contract with LACoFD.

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Mobile radio

Mobile radio or mobiles refer to wireless communications systems and devices which are based on radio frequencies(using commonly UHF or VHF frequencies), and where the path of communications is movable on either end.

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Motorola

Motorola, Inc. was an American multinational telecommunications company founded on September 25, 1928, based in Schaumburg, Illinois.

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Octal

The octal numeral system, or oct for short, is the base-8 number system, and uses the digits 0 to 7.

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Pitch (music)

Pitch is a perceptual property of sounds that allows their ordering on a frequency-related scale, or more commonly, pitch is the quality that makes it possible to judge sounds as "higher" and "lower" in the sense associated with musical melodies.

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Radio repeater

A radio repeater is a combination of a radio receiver and a radio transmitter that receives a signal and retransmits it, so that two-way radio signals can cover longer distances.

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Reset (computing)

In a computer or data transmission system, a reset clears any pending errors or events and brings a system to normal condition or an initial state, usually in a controlled manner.

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Selcall

Selcall (selective calling) is a type of squelch protocol used in radio communications systems, in which transmissions include a brief burst of sequential audio tones.

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Siren (alarm)

A siren is a loud noise-making device.

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Squelch

In telecommunications, squelch is a circuit function that acts to suppress the audio (or video) output of a receiver in the absence of a sufficiently strong desired input signal.

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Stream

A stream is a body of water with surface water flowing within the bed and banks of a channel.

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Time-division multiple access

Time-division multiple access (TDMA) is a channel access method for shared-medium networks.

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Trademark

A trademark, trade mark, or trade-markThe styling of trademark as a single word is predominantly used in the United States and Philippines only, while the two-word styling trade mark is used in many other countries around the world, including the European Union and Commonwealth and ex-Commonwealth jurisdictions (although Canada officially uses "trade-mark" pursuant to the Trade-mark Act, "trade mark" and "trademark" are also commonly used).

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Trunked radio system

A trunked radio system is two-way radio system that uses a control channel to automatically direct radio traffic.

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Two-way radio

A two-way radio is a radio that can do both transmit and receive a signal (a transceiver), unlike a broadcast receiver which only receives content.

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Window function

In signal processing, a window function (also known as an apodization function or tapering function) is a mathematical function that is zero-valued outside of some chosen interval.

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Redirects here:

QC 1, QC+I, Quick Call, Quick Call I, Quik Call I, Quik call 1, SECAL, Single tone, Tone burst, Two-tone sequential.

References

[1] https://en.wikipedia.org/wiki/Selective_calling

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