Stubborn pain points of traditional shields:
Large number of installations: Generally, a medium-sized prison traditional signal jammer device needs to install hundreds of low-power devices or dozens of high-power devices, or even more.
Large amount of radiation: Dozens or even hundreds of jammers will produce excessive radiation when working at the same time, which greatly affects human health.
Difficulty in supervision: There are many equipment installation points, which are easy to be damaged, the number of power cords, and the complicated wiring will cause safety hazards and lead to difficulties in supervision.
Severe interference to base station signals: Traditional jammers do not have the function of intelligently analyzing and collecting signals, and use the working principle of broadband transmission.
The uplink and downlink of the 2G signal base station are separated. The shield can only shield the downlink but not the uplink; the base station transmits the uplink signal, and the mobile phone transmits the downlink signal. The communication can only be carried out after the uplink and downlink signals are shaken. The traditional shielding device is prone to offset during operation, and cannot be corrected after the offset.
The 3G signal base station uses TD technology, and the 4G signal base station uses TDD technology; the technical principle of these two technologies is the use of time division synchronization technology. The so-called time division synchronization is equivalent to one lane. If the two types of vehicles are used, it can only go up one minute and go down the next. However, traditional jammers cannot achieve this synchronization and will naturally interfere with the uplink signal.
Based on the above problems, traditional jammers have produced results that affect the base station.
Difficulty in construction: There are many prison buildings, the structure of the building is complex, the construction and installation of traditional shielding products are difficult, the construction period is long, and the construction cost is high.
There are many blind spots and blind spots: In an area where the base stations are not densely distributed, in order to ensure the strength of the communication signal in this area, without increasing the base station, several strong point signals will be transmitted in the same bandwidth (one strong point can support 128 Mobile phone communication), the traditional jammer cannot intelligently analyze the strong signal in the same bandwidth, but actively transmits the signal of the same power in the same bandwidth. Once the base station releases several strong signal limits, the traditional jammer will suppress Can not help, resulting in the phenomenon of blind spots and dead ends.
As a prison, there are strict regulations on the use of mobile phones, but traditional shielding products are difficult to strictly shield. There are often many blind corners or blind spots. The shielded area is not completely shielded, and the area that should not be shielded is affected.
High failure rate: traditional jammers use high-power amplifier tubes, which do not have intelligent control functions. If the jammers are not turned off artificially, this kind of amplifier tubes will always work, while the shields installed in prisons The amplifier generally requires 365 days of uninterrupted work. Under the state of full load, this kind of power amplifier tube will attenuate with time, and it will be directly damaged in severe cases;
The base station strengthens the transmission power, which makes it impossible to shield: When the traditional shielding device leaves the factory, the working frequency and power are fixed and unadjustable, and the operator will adjust the power and frequency according to the changes in the number of customers in the coverage area. After adjustment, the traditional shielding device It cannot be blocked.
The above pain points can be solved perfectly by using a smart public network signal control system (mobile phone signal jammer).
Generally, a medium-sized prison only needs 4-6 sets of smart portable mobile phone signal interference system to complete the shielding of the entire prison. The number of equipment is small, the shielding is accurate and efficient, and the construction is simple, the cycle is short, and it supports remote control and wireless management. Regulatory costs. It adopts micro-power green output, which is harmless to human body; intelligently analyzes operator base station signals to ensure that the output is accurate and not affected by base station adjustment; imported components are reliable in quality; provide point-to-point professional technical solutions to completely eliminate blind spots.