A Mobile Jammer Circuit or a Cell Phone Jammer Circuit is an instrument or device that can prevent the reception of signals by Mobile Phones. Basically, a Mobile Jammer Circuit is an RF Transmitter, which broadcasts Radio Signals in the same (or similar) frequency range of the GSM Communication.
The signal blockers were originally made by law enforcement officers to intercept terrorists and criminals messages. Today, the cell phone jammer are largely being used for official purposes to fight against terrorism. Right from suppression of communication as a preventive measure for organized crimes, to neutralizing remote controlled bomb explosions. It is even believed that the effort to assassinate influential leaders was nullified with the use of jammers. There is no doubt that disciplinary institutions now demand for this kind of small equipment is very large. At the same time this kind of equipment would really solve the punishment has been faced with the problem
The emergence of this equipment to disciplinary institution reorganization disciplinary security brought great confidence. “These promising test results mark a step forward countering the security threat posed by contraband cellphones,” said Assistant Attorney General Beth Williams of the Justice Department’s Office of Legal Policy. “The results indicate the potential for localized impact of this micro-jamming technology. That is an encouraging sign that brings us closer to a solution that will make our communities safer and help prevent the continuation of criminal activity from inside prison walls.”
The data in the report will be used by BOP and the Department to understand the efficacy of micro-jamming, conduct further evaluation of jamming technology, and develop recommendations for strategic planning.
A jammer can block all radio communications on any device that operates on radio frequencies within its range (i.e., within a certain radius of the jammer) by emitting radio frequency waves that prevent the targeted device from establishing or maintaining a connection.
For example, jammers can prevent your cell phone from making or receiving calls, text messages, and emails; prevent your Wi-Fi enabled device from connecting to the Internet; prevent your GPS unit from receiving correct positioning signals; and prevent a first responder from locating you in an emergency.
The Israeli Prisons Authority said it installed the jammer to prevent phone calls being made from smuggled mobile devices, saying they posed a security threat. It had no further comment.