Block Cell Phone Service In One Room Blocks Trust Between People
Everyone is no stranger to cell phone signal jammers. During the junior and senior high school exams, it was no surprise that the school placed Block Cell Phone Service In One Room in the classroom to prevent students from using mobile phones to search for answers on the Internet during the exam, but its How does it work, let's take a look. "The mobile phone jammer scans from the low-end frequency of the forward channel to the high-end at a certain speed during the working process. This scanning speed can cause garbled interference in the received message signal of the mobile phone, and the mobile phone cannot detect the normal data sent from the base station, so that the The mobile phone cannot establish a connection with the base station. The mobile phone appears to be searching for the network, the mobile phone has no signal, and there is no service system." The main purpose of purchasing cell phone jammer is to prevent cheating in exams. Many students use their mobile phones to cheat in exams. In order to prevent the recurrence of this phenomenon and ensure that the examination is held fairly and impartially, the school purchased a mobile phone signal jammer. The reason why the Academic Affairs Office made such a decision is because of the existence of cheating in exams. The cell phone signal blocker blocks not only the signal, but also the trust between students and teachers.
Now Block Cell Phone Service In One Room is all frequency bands, it can block all 2G 3G 4G signals, 2.4G WIFI signals and Bluetooth signals under the three operators of China Mobile, China Unicom and Telecom. Its principle is to interfere with the frequency it sends out. Cell phones receive frequencies from base stations and wireless routers, thereby shielding them. In a certain frequency range, the mobile phone and the base station are connected by radio waves to complete the transmission of data and sound with a certain baud rate and modulation method. The jammer scans from the low-end frequency of the forward channel to the high-end frequency at a certain speed during the operation. The scanning speed can cause garbled interference in the received message signal of the mobile phone. The mobile phone cannot detect the normal data sent from the base station, so that the mobile phone cannot establish a connection with the base station, so as to achieve the purpose of shielding the mobile phone signal. No service system, etc. The working principle of the mobile phone signal jammer is generally speaking that the frequency emitted by the jammer itself interferes with the normal frequency of the mobile phone receiving the base station, so that the mobile phone cannot be connected to the base station, so that it cannot normally make calls, receive and send text messages and surf the Internet.