Cell phone jammer can prevent prisoners from remote fraud

Construction project design, advanced technology, construction specifications, quality, the system has good practicability, reliability, the technical indicators All meet the design requirements. "electromagnetic shielding room building now computer technology as outlined below, to share with their peers. First, an overview of computer systems computer room shielding as any electronic device, and at work will have a wire or through space to a certain degree of electromagnetic radiation surrounding energy.The intelligent system of    cell phone jammer    is the first choice of the informatization management product for the public security system and judicial system. In recent years, with the receiver technology development and improvement of analytical tools to extract information, the computer system itself weak electromagnetic radiation signal has been very easy to be captured, resulting in a computer system plaintext and ciphertext received stolen compromised, the secret and password system under serious threat. Usually people from the following three aspects of the computer system to suppress radiation of electromagnetic signals and preventive measures. The intelligent system of cell phone jammer is a good choice of the informatization management product for educational system and national secrecy system.1, the physical aspects of the measures to select the appropriate location of the geographical environment of the room, set the buffer zone and confidentiality, the use of electromagnetic wave propagation in space will decay with distance from the characteristics of protection.    cell phone jammer can prevent prisoners from remote fraud.According to the U.S. Federal Communications Commission standards FCC15-J provides computers and other digital electronic devices in the frequency range 30 ~ 1000MHZ maximum allowable radiation field strength (equivalent to 1 m, 1MHZ bandwidth) is 82dbμV / m, taking into account the bandwidth of the receiving device 1MHZ can receive the minimum field strength -3 dbμV / m, and leave some margin of safety, protection for one meter distance, you need 90db of shielding effectiveness, protection from the law can be considered 6db octave lower, if the requirements of 90db at 1 meter protective distance of 4 meters, then just 78db; distance of 10 meters, as long as 70db, a distance of 30 meters, need to 60db; if they can maintain the 100 meters, then the shielding attenuation of 50db on it.      cell phone jammer can prevent prisoners from remotely controlling the criminal outside the prison to continuously commit the crime.Currently, the domestic aspects of the shielded room is fairly representative of the product, such as, P22 double metal mesh removable electromagnetic shielding room and GP1-type electromagnetic shielding layer copper detachable chamber, its technical performance is as follows: frequency range (HZ) 10K 150K 200K 300K-1G P-22 150K-1G 10GC 15GC GP1 10K-15G - ≥ 75db - - 70 95 100 100 87 GP1 shielded chamber performance has surpassed Japan to SRC's products, the level close to the British BELLINGLEE products. According to the information, at present, the United States TEMFEST shielded room of technical performance has reached the 1K ~ 18GHZ attenuation within the shield 70 ~ 140db.   cell phone jammer   can prevent prisoners from making confession in collusion through the illegal communication equipment. In the computer terminal, data input and output devices, memory, tape and other equipment, using a variety of protective measures, so to minimize the radiation energy, for example, the internal circuit, circuit layout, component selection and other aspects into account and a series of choices to reduce the high frequency harmonics, parasitic oscillations and line coupling. From our current situation, the computer room to prevent the implementation of electromagnetic shielding is still the most important information leakage, the most realistic means.
The purpose of shielding the computer room, first in order to prevent electromagnetic interference outside the computer room to work; the second is the engine room to prevent the leakage of computer system information.