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  2. Radio scanner - Wikipedia

    en.wikipedia.org/wiki/Radio_scanner

    A scanner (also referred to as a radio scanner) is a radio receiver that can automatically tune, or scan, two or more discrete frequencies, stopping when it finds a signal on one of them and then continuing to scan other frequencies when the initial transmission ceases. The term scanner generally refers to a communications receiver that is ...

  3. Police radio - Wikipedia

    en.wikipedia.org/wiki/Police_radio

    Police radio. Police radio is a radio system used by police and other law enforcement agencies to communicate with one another. Police radio systems almost always use two-way radio systems to allow for communications between police officers and dispatchers . Most modern police radio systems are encrypted, and many jurisdictions have made ...

  4. Project 25 - Wikipedia

    en.wikipedia.org/wiki/Project_25

    Project 25 ( P25 or APCO-25) is a suite of standards for interoperable digital two-way radio products. P25 was developed by public safety professionals in North America and has gained acceptance for public safety, security, public service, and commercial applications worldwide. [1] P25 radios are a direct replacement for analog UHF (typically ...

  5. Johnson County police to encrypt radio scanners, sparking ...

    www.aol.com/johnson-county-police-encrypt-radio...

    January 11, 2024 at 6:02 AM. “Beginning on January 23, 2024, the following Johnson County police agencies will begin full encryption of their radio communications.”. So began a media release ...

  6. Let the city listen: The NYPD should keep police radio ...

    www.aol.com/lifestyle/let-city-listen-nypd-keep...

    The NYPD has begun encrypting scanner radios that the press and the public have used to monitor basic police communications for more than 90 years. While the desire to put such communications on ...

  7. Covert listening device - Wikipedia

    en.wikipedia.org/wiki/Covert_listening_device

    A covert listening device, more commonly known as a bug or a wire, is usually a combination of a miniature radio transmitter with a microphone. The use of bugs, called bugging, or wiretapping is a common technique in surveillance, espionage and police investigations. Self-contained electronic covert listening devices came into common use with ...

  8. Citizen (app) - Wikipedia

    en.wikipedia.org/wiki/Citizen_(app)

    He thought about the modern, invisible signals of wireless calls, Wi-Fi and police radio darting through the 19th-century buildings." Vigilante was backed by a seed round of $1 million, led by Founders Fund. The Vigilante app was released to New York City, in the App Store on October 26, 2016.

  9. Emergency Alert System - Wikipedia

    en.wikipedia.org/wiki/Emergency_Alert_System

    Primary Entry Point stations. The National Public Warning System, also known as the Primary Entry Point (PEP) stations, is a network of 77 radio stations that are, in coordination with FEMA, used to originate emergency alert and warning information to the public before, during, and after incidents and disasters.

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