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A voice-activated radio-dispatched alarm, or VARDA-alarm, is a type of burglar alarm that, when activated or "tripped", broadcasts the type of the alarm and the transmitter location over the local police radio frequency using a pre-recorded audio message. [1] In 1968, the voice-activated radio dispatched alarm (VARDA), was invented.
Police radio systems historically used public radio frequencies, and listening to them was, for the most part, legal. Most modern police radio systems switched to encrypted radio systems in the 1990s and 2000s to prevent eavesdroppers from listening in.
The following is a list of FCC-licensed radio stations in the U.S. state of Pennsylvania, which can be sorted by their call signs, frequencies, cities of license, licensees, and programming formats. List of radio stations
Individuals who listen to scanners to hear reports about crashes and crimes in York County have been wondering why local law enforcement calls suddenly cannot be heard anymore.
Davidzon Radio, Inc. Brokered time WSOU: 89.5 FM: South Orange: Seton Hall University: Modern active rock WSRX-LP: 107.9 FM: Vernon: Skylands Radio Cooperative: Variety WSUS: 102.3 FM: Franklin: iHM Licenses, LLC: Adult contemporary WTHA: 88.1 FM: Berlin: Bux-Mont Educational Radio Association: Big band/Doo wop/Oldies (Simulcast of WRDV) WTHJ ...
The following is a list of the FCC-licensed radio stations in the United States Commonwealth of Massachusetts, which can be sorted by their call signs, frequencies, cities of license, licensees, and programming formats.
A police radio code is a brevity code, usually numerical or alphanumerical, used to transmit information between law enforcement over police radio systems in the United States. Examples of police codes include " 10 codes " (such as 10-4 for "okay" or "acknowledged"—sometimes written X4 or X-4), signals, incident codes, response codes , or ...
A trunked radio system is a two-way radio system that uses a control channel to automatically assign frequency channels to groups of user radios. In a traditional half-duplex land mobile radio system a group of users (a talkgroup ) with mobile and portable two-way radios communicate over a single shared radio channel, with one user at a time ...
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