Interferers are signals that transmit the same frequency
A GSM jammer or cell phone jammer is a device that sends a signal at the same frequency as a GSM system. If the mobile phone is disabled in the area where the source of interference is located, the failure is successful. Jammers were first developed and used by the military. If the tactical commander uses radio frequency communications to control the army, the enemy is interested in such communications. This interest comes from the basic field of denying the successful transfer of information from the sender to the receiver.
Today, portable jammer or jammer software are becoming a civilian product compared to electronic warfare devices. As the number of mobile phone users grows, so does the need to disable mobile phones at certain times when they interfere with the ringing tone of the mobile phone. big. These locations include chapels, university auditoriums, libraries, concert halls, conference rooms, and other places where silence is important.
The mobile jammer device sends signals at the same frequency as the mobile phone, and the two signals collide with each other and cancel each other out with enough power to overwhelm the mobile phone. Mobile phones are designed to increase power with little interference. Therefore, disturbers need to be aware of and adjust for mobile phone performance improvements. Mobile phones are full-duplex devices. That is, one uses two separate frequencies for calling and the other for listening at the same time. Some jammers block only one of the frequencies used by mobile phones, blocking both frequencies.
The phone could only receive one of these frequencies, which made me think that there was no service. Less complex devices block only one set of frequencies, while complex jammers can block multiple network types at the same time to turn off dual-mode or triple-mode phones. These phones automatically switch between different network types to find open signals. Some high-end devices block all frequencies at the same time, while others can be tuned to specific frequencies.
All you need to interfere with your phone is a device that sends at the correct frequency. Different cellular systems handle signals differently, but all cellular networks use radio signals that can be disrupted. GSM used in digital cellular and PCS-based systems operates in the 900 MHz and 1800 MHz bands in Europe and Asia, and in the 1900 MHz band (sometimes referred to as 1.9 GHz) in the United States. Interfering devices can transmit at any frequency and are effective for AMPS, CDMA, TDMA, GSM, PCS, DCS, iDEN, and Nextel systems. Older analog phones and today's digital devices are similarly vulnerable to interference. Suspending a mobile phone is the same as interrupting another type of wireless communication. The mobile phone communicates with the service network through the base station or base station. Communication towers divide a city into smaller areas or units. When a mobile phone user drives the street, the signal is passed from one tower to another
The interfering device transmits on the same radio frequency as the mobile phone and interrupts the communication between the phone and the base station of the mobile phone in the city. This is called a denial of service attack. The jammer refuses to provide the radio spectrum to mobile phone users within the range of interference. Older jammers may also be used.
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