Can the signal jammer block all telephone signals

When mobile phone works, it is in certain frequency range, mobile phone and base station connect through radio wave, complete data and sound transmission with certain baud rate and modulation mode. According to this communication principle, the mobile phone signal shield can scan from the low frequency of the front channel to the high frequency at a certain speed in the working process. The scanning speed can form chaotic code interference in the signal received by the mobile phone. The mobile phone cannot detect the normal data sent from the base station, so the mobile phone cannot establish a connection with the base station. Mobile phone performance for the search network, no signal, no service system and other phenomena.

Cell phone jammer specific shield what, what should see interference is which frequency band. GSM, CDMA, FDD communication band are not the same, shielding principle is very simple, is in the corresponding band interference. For example, if you and I are talking face to face and a group of people are singing loudly, then we can’t hear each other. Signal blocking is the equivalent of a group of people singing loudly in the frequency range of cell phone communications. Use a frequency to block cell phone signals within a certain range. The equivalent of a cell phone signal in a certain space completely isolated (general shielding instrument can do, high precision is 99.99999% signal shielding). It’s not just cell phone signals. Some radio transmissions are blocked.