A working cellphone must be in constant communication with its network provider via a cell tower or base station. By sending out radio waves in cellphone frequencies, jammers launch denial-of-service attacks (DoS), causing mobile devices to lose base station communication.

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A cell phone jammer is a device that blocks transmission or reception of signals, usually by creating some form of interference at the same frequency ranges that cell phones use. As a result, a cell phone user will either lose the signal or experience a significant loss of signal quality.

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Its emission of electromagnetic disturbance signal carrier frequency and the carrier frequency of the same, so be a receiver and amplifier demodulation (reduction), interference signal and interference signals in the receiving terminal at the same time. It's like with fake goods (like interference signals) transporter and transporter of real jamming signal (like) model (carrier frequency), the same appearance only car from goods receiving, the result is really fake goods to the shipper together. Electronic jamming power strong enough, capped by interference signal, the interference can be to achieve.

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These cellular jammers are permanently controlled by a central administrator who can authorize or prohibit cellular communications. These cellular jammers are connected via a CAN (Controller Area Network) network in a local area network and managed by a central base station (CBS). The intelligent scrambling system controls everything from detection to alert when and where an individual cell phone tries to establish a call, to block calls.

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