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Mobile Cell Phone Jamming: A Guide Mobile phones are everywhere this days, according to Latest research about two hundred million people in the united states of America had cell phone service in October 2005, and still even more pervasive in Europe. Regrettably, restaurants, movie theaters, concerts, churches shopping malls all suffer in the spread of cell phones because not all of cell phone users know when to quit talking. They become a nuisance and while most of us grumble and move on, some people go to the extremes and retaliate. Nonetheless, cell phones are basically handheld two-way radio and just like every radio that the signal can be deciphered. Disrupting a cell phone the same as jamming any other kind Of radio communication. A cell phone functions by communicating with its service network from a foundation tower or station. The stations divide the city into small areas, as a cell phone user drives down the street, the signal is transferred from tower to tower. A jamming device passes on the same radio frequencies as the cell phone, interrupting the communication between the phone and the cell-phone base station. This process is referred to as denial-of -service attack. The jammer denies service of the radio spectrum within range of the jamming device to the cell phone user. Jamming devices override the mobile phone by transferring a Signal on the same frequency and in a high power that the two signals crash and cancel each other out. Cell phones were created to add power should they experience low-level interference, so the jammer should know and match the energy increase from the phone.
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Cell phones are designed to be full-duplex type of devices, which means they use two separate frequencies, one for talking and one for listening concurrently. Some jammers block only one of the frequencies used by cell phones, which has the effect of blocking both and hence the phone is made to believe there is no service because it can receive only one of the frequencies.
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Simple jamming devices block only one set of frequencies, while complex jammers can block several types of networks at once to go off dual-mode or tri-mode phones that automatically switch among various network types to find a signal which might be open. Some of these high-end devices block all frequencies at the same time, and others can be tuned to certain frequencies based on its purpose. The actual space of the jamming device depends on its own Power and the neighborhood environment, which might comprise hills or tall walls of a construction that obstruct the jamming signal. Low-powered jammers block calls in a range of approximately nine meters. Higher-powered units cover a larger area as large as a football field. The components used by law enforcement can close down service about two km from the device. In order for one to jam a cell phone, all you need is a device that transmit on the right frequencies. Even though, different cellular Systems process signals otherwise, all cell-phone networks use radio signals That can be disrupted. The Old-fashioned analog mobile phones and today’s Digital devices are equally vulnerable to jamming.