Mobile jammers have aroused a lot of interest

In the fight against criminals in prisons using prohibited mobile phones, law enforcement agencies may be closer to technologies that can interfere with phone signals in prisons without affecting nearby communications. In January of this year, officials from the Department of Justice and researchers from the National Telecommunications and Information Administration gathered in a federal prison to test technologies that could disrupt radio services that could interfere with thousands of mobile phones entering the prison each year. NTIA stated that the test used a prototype device provided by an undisclosed supplier and successfully shielded a commercial cell phone signal in a unit of the Federal Correctional Institution in Cumberland County, Maryland, but only outside the building’s wall 20 Feet. Commercial radio waves. In a June 15 statement, Deputy Attorney General Beth Williams, the Attorney General of the Department of Justice, said: “These encouraging test results are a step towards addressing the security threat posed by smuggled calls.”

The ability to destroy prisoners’ cell phones has become a major goal of the US Department of Justice and other federal agencies. Officials say anything from controlling cell phone gang activities and violent crimes inside and outside prisons to spreading child pornography and intimidating witnesses, from smuggling cell phones to prisons can cause chaos. The Federal Communications Commission passed regulations in March last year to expedite the approval of anti-smuggling systems in prisons. Because they use commercial spectrum, they need an FCC license to operate. Such systems either detect transmissions or use management access methods developed from licensed commercial frequencies,

More than a year ago, ExxonMobil and its Canadian subsidiary, Imperial Petroleum, began announcing at their gas stations that motorists should turn off their mobile phones and extinguish cigarettes before refueling. This is a response to the story of an unconfirmed Indonesian motorist. Sparks from the driver’s mobile phone ignited the smoke and caused an explosion. David Warnes, a senior consultant for Industry Canada, said: “Mobile cell phone jammer have aroused a lot of interest.” Last month, Hong Kong was a city full of mobile phones, with about 6 million people and 5.2 million mobile phones. It is believed that a jammer was used.

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