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Talking about the role of mobile phone signal shielding
Due to the development of communication technology, personal mobile communications have brought convenience to people's lives, and the adverse impact on prisons, detention centers and other similar occasions has become increasingly prominent. Once the mobile phone is illegally brought into prison and put into practice, it will bring great harm to the management and security of prisons, detention centers and other places. Therefore, the establishment of a truly effective mobile phone shielding system can provide powerful technical protection for prisons and detention centers.
However, due to the current mixed market, a lot of inexpensive mobile phone screens are mainly suitable for general civilian places due to restrictions on performance indicators, reliability, and operating conditions. In prisons and detention centers and other large places, there may be certain problems, for example, Some external interference problems have even seriously affected public communications.
Why is the cell phone signal mask purchased by the Provincial Prison Administration causing such great interference to the surrounding public communications? Let me analyze a little bit about it. If there is any deficiency, I hope you can correct me:
1, mobile phone signal shielding from the technical point of view, in fact, only a small branch of the wireless information shielding system, its essence is electronic confrontation, or known as the same frequency interference, that is, the use of equipment through the antenna to send high-frequency signals, so that the phone is receiving When there is a bit error in the downlink signal, it cannot be identified and entered into the network. The mobile phone shows no network state and meets the signal shielding requirements.
2. For mobile phone signal shielding , we all know that we should interfere with the downlink, but due to a series of factors such as technical cost, price, and production, it is difficult to interfere only with the downlink. Therefore, some unscrupulous manufacturers do not make precise frequencies in order to improve the interference effect. The adjustment of the range causes some of the interference energy to the uplink, which can indeed greatly increase the ability to interfere and play a positive role, but at the expense of the public interest;
3, mobile phone signal in the same room, different locations, different times may have greater changes, according to actual experience can reach about 10dBm, conversion success rate, the difference is 10 times. It can be seen that the mobile phone signal shielding is actually a technically demanding project, and it cannot be solved by simply purchasing the shielding device itself. Site surveys, power calculations, construction design, and equipment commissioning are all complementary and inseparable.
Shenzhen Hongjie Electronics Co., Ltd. is a high-tech enterprise integrating research, development, sales and maintenance.
Since its inception, the company has devoted itself to the field of communications and has the ability to independently develop, produce and market-explore. It is currently the largest manufacturer in the country. With advanced technology, good reputation and perfect after-sales service to get the trust of users. The products are mainly used in places such as examination rooms, schools, libraries, prisons, courts, conference halls, theaters, and churches that need to be protected against cheating and silence.