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  2. Carr wants to know why FCC won't allow prison cell phone jamming

    www.aol.com/carr-wants-know-why-fcc-201600172.html

    (The Center Square) – Georgia Attorney General Chris Carr wants to know why the Federal Communications Commission will not let law enforcement jam prison and jail cell phones. Cellphones are not ...

  3. Mobile phones in prison - Wikipedia

    en.wikipedia.org/wiki/Mobile_phones_in_prison

    Cellphones in prisons have been used to organize work stoppages for prison labor between prisons. [3] Forced penal labor in the United States is a common practice. [citation needed] In the United States, prison phone calls represent one of the few ways that prisoners can connect with family and loved ones in the outside world.

  4. Mobile phone jammer - Wikipedia

    en.wikipedia.org/wiki/Mobile_phone_jammer

    Example of a mobile phone jammer, produced by Jammerspro. A mobile phone jammer or blocker is a device which deliberately transmits signals on the same radio frequencies as mobile phones, disrupting the communication between the phone and the cell-phone base station, effectively disabling mobile phones within the range of the jammer, preventing them from receiving signals and from transmitting ...

  5. Prison phone jamming demo canceled, inmates promptly order ...

    www.aol.com/news/2009-01-13-prison-phone-jamming...

    There's been a little bit of drama brewing out in DC lately, and for good reason: prisoners' ability to order pizza, drugs, and hits from the comfort of their cells is at risk. After ordering an ...

  6. Electronic monitoring in the United States - Wikipedia

    en.wikipedia.org/wiki/Electronic_monitoring_in...

    Prison overcrowding in CA led to a 2011 court order to reduce the state prison population by 30,000 inmates.. In the aftermath of decades-long tough on crime legislation that increased the US inmate population from 200,000 [6] in 1973 to over two million in 2009, [7] financially strapped states and cities turned to technology—wrist and ankle monitors—to reduce inmate populations as courts ...

  7. Faraday cage - Wikipedia

    en.wikipedia.org/wiki/Faraday_cage

    Some buildings, such as prisons, are constructed as a Faraday cage because they have reasons to block both incoming and outgoing cell phone calls by prisoners. [9] [10] The exhibit hall of the Green Bank Observatory is a Faraday cage to prevent interference with the operations of their radio telescopes. [11]

  8. Inmate telephone system - Wikipedia

    en.wikipedia.org/wiki/Inmate_telephone_system

    In order to use an inmate telephone service, inmates must register and provide a list of names and numbers for the people they intend to communicate with. [5] Call limitations vary depending on the prison's house rule, but calls are typically limited to 15 minutes each, and inmates must wait thirty minutes before being allowed to make another call. [6]

  9. Jamming - Wikipedia

    en.wikipedia.org/wiki/Jamming

    Jamming (knot), the tendency of knots to become difficult to untie; Interfering with communications or surveillance: Radio jamming; Radar jamming and deception; Mobile phone jammer; Echolocation jamming; Radio-controlled improvised explosive device jamming, a counter-IED technique; Jamming (physics), an apparent change of physical state

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