signaling with push-to-talk switch

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• Selective calling — SECAL redirects here. For the French wine grape also known as Secal, see Jurançon (grape). 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.… …   Wikipedia

• Dual-tone multi-frequency — (DTMF) signaling is used for telephone signaling over the line in the voice frequency band to the call switching center. The version of DTMF used for telephone tone dialing is known by the trademarked term Touch Tone (canceled March 13, 1984),… …   Wikipedia

• 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. It is sometimes called tone squelch. Where more… …   Wikipedia

• Radio communications during the September 11 attacks — This article reviews some of the details of radio communications at the September 11, 2001 World Trade Center attacks. [The purpose of revealing the operational details in this article is to allow operators of other communications networks and… …   Wikipedia

• 2008 Chatsworth train collision — This article is about the 2008 Metrolink train collision in Los Angeles. For the 1887 train collision at Great Chatsworth, Illinois, see 1887 Great Chatsworth train wreck. Chatsworth train collision Resc …   Wikipedia

• List of electronics topics — Alphabetization has been neglected in some parts of this article (the b section in particular). You can help by editing it. This is a list of communications, computers, electronic circuits, fiberoptics, microelectronics, medical electronics,… …   Wikipedia

• GE Marc V — Listen filename=Simulated GE Mark V Call.ogg title=GE Marc V description=Hear a simulated GE Marc V call as it would sound from a mobile, (version 2). format=OggGE Marc V is a historic U.S. format or protocol of trunked, two way radio introduced… …   Wikipedia

• Voice over IP — Digital voice redirects here. For the commercial service, see Comcast Digital Voice. Voice over Internet Protocol (Voice over IP, VoIP) is a family of technologies, methodologies, communication protocols, and transmission techniques for the… …   Wikipedia

• CTCSS — 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. Where more than one user group is on the same… …   Wikipedia

• Tone remote — General Electric Mobile Radio, unknown year). This GE manual covers tone and DC remotes. ] [To confirm the use of the phrase tone remote as accurate in describing this type of device, please see US Patent and Trademark Office patent ID 6950653,… …   Wikipedia

• Citizens' band radio — Typical 1980s CB base station, used with outdoor antenna. This radio may also be used in an automobile, since it is powered by 13.8V DC. Shown with Astatic Power D 104 desk mic …   Wikipedia