High power prison shielding solution

1 Demand analysis of prison mobile phone signal shielding project

1.1 The importance of installing mobile phone signal blocking systems in prison facilities

With the continuous development and popularization of mobile communication tools such as mobile phones, and the continuous improvement of the technical level of personal mobile communication means, especially the promotion and application of 3G and 4G technologies, for similar areas such as prisons, labor camps, detention centers, and drug rehabilitation centers, The negative effects of cell phones are becoming more and more prominent. In prisons, detention centers and other places of supervision, mobile communication tools such as mobile phones are explicitly prohibited, not only for prisoners, but also for supervisors. Once a mobile phone is brought into a prison and used, it will bring great harm to the management, safety and development of the prison. Some prisoners use illegally smuggled mobile phones to make calls, send text messages, obtain information, threaten witnesses, and even form gangs and organize prison escapes. Because of this, it is urgent to install mobile phone signal blocking systems in prisons and other prison facilities. extent!

1.2 How to establish a prison cell phone signal blocking system

1.2.1 What factors should be considered when establishing a mobile phone signal blocking system?

●Impact from base stations

At present, China Mobile, China Unicom, and China Telecom have built hundreds of thousands of base stations across the country. The power and number of channels of each base station are different, and the distance between each base station and prisons is different. It is generally recommended to install surveillance systems with mobile phone signal shielding systems. It is best not to have a base station within two to three hundred meters of the area. If there is a base station, you need to focus on the impact of the base station being too close and the signal being too strong!

●Influence from the layout of various buildings in the prison

The scale, number of buildings, structure, size, floor height, etc. of each prison are different. The direction, power, terrain and other factors of the distribution of mobile phone base stations around each prison are also different. The strength of mobile phone signals transmitted from distant base stations is also different. No, the layout of each prison needs to be designed based on the actual site conditions!

●Impact on other aspects

Even in the same environment, base station signals are affected by wind disturbance, air humidity, etc., which will also cause fluctuations in signal field strength. In addition, there are also differences in field strength between indoor and outdoor spaces, the ground, building structures, materials, and metal objects that affect mobile phones. Blocking signals has very complex adverse effects.

●Selection and technical indicators of shielding equipment

Reasonably plan the selection of shielding equipment based on project funds. When selecting shielding equipment, attention should be paid to the size of its shielding radius (i.e., power), performance stability, life span, etc. The selection should also be based on the site environment. Also consider using a mobile phone signal with adjustable radius (i.e. adjustable power) jammer , or use a directional antenna to control the main emission area (direction) of the shielded signal.

●Influences from human factors and normal machine wear and tear

Cell phone signal shielding systems are installed in prisons. Most of the shielding terminals are installed at relatively high or slightly concealed locations so that they are not detected by ordinary people. However, this does not necessarily prevent man-made damage. The impact of future human factors must be considered, including prison sentences. The prisoners (and the guards also resisted) artificially damaged or cut off the jammerpower supply, mobile phone signaljammer This kind of electronic product will also undergo normal wear and tear as working hours accumulate. It is difficult to guarantee that the several shielding points installed in the prison can operate 100% stably every day. As a manager, you should be able to have a simple and convenient set of centralized The control system can promptly discover the shielding points that are damaged by man-made damage or normal loss, and quickly arrange maintenance and inspection.

1.2.2 What preparations should be made to establish a mobile phone signal blocking system?

● Clarify the scope of the shielding area, whether it is shielding in key areas (or buildings) in the prison area or in the entire walled compound;

● Clarify the expected planning and effects of the shielding project, including the planning funding for the entire mobile phone shielding project, which is general and only includes installationjammer To achieve the shielding effect, it is better to carry out scientific and intelligent centralized control shielding;

    Prepare a unit floor plan and mark the name, layout, size, floor height, etc. of each building in the prison area. At the same time, the environment surrounding the prison should also be marked, especially the location of office areas, residential buildings, social factories, etc. within a few hundred meters of the fence;

●Divide key shielding areas, non-key shielding areas and areas that do not need to be shielded;

●Understand the distribution of base stations around the prison (location and communications company);

●Be prepared for dealers or manufacturers of future mobile phone shielding system construction projects to conduct on-site inspections and tests;

2 Traditional installation onlyjammer Comparison of the advantages and disadvantages of the solution and the Weikai prison mobile phone shielding network intelligent management system

Cell phone signal blocking for a prison or custody area, whether using low powerjammer The method of cellular distribution is to use high-power mobile phonesjammer Mainly, low powerjammer To assist in supplementing the blind spots, several mobile phone signal shielding points will be installed in the entire prison area. For these shielding points, the successful completion of the project does not mean that they are installed and turned on for testing to achieve the shielding effect. How? Ensuring the normal and stable operation of these several mobile phone signal shielding points in the future is the key to the entire mobile phone signal shielding project!

2.1 At present, domestic prisons only install mobile phone signalsjammer Disadvantages

●It is inconvenient to turn on and off uniformly

Cell phone signaljammer When there are too many units, especially when multiple buildings in the prison area are shielded, it is difficult to turn them on and off in a centralized and unified manner; even if the power lines are arranged uniformly, a dedicated person is required to turn them on and off on time;

●Unable to knowjammerworking status and malfunction

All cell phone signalsjammer After opening, managers cannot immediately know which pointsjammer Whether it is working properly;

●Not energy-saving and environmentally friendly, not conducive to equipment maintenance

generalize alljammer Keeping it open for many years is not conducive to energy saving, environmental protection, equipment maintenance, and shortens the service life of equipment; (factory areas, canteens, warehouses, etc. are unmanned at night, so there is no need to place mobile phones in these locations.jammer Continuous operation 24 hours a day)

●Not convenient for group control or point-to-point control

It is impossible to perform precise timing switch control in arbitrary groups or point-to-point;

●Failure to prevent vandalismjammerphenomenon

Intentional damage by prisoners or prison guards, cutting off power, etc. affecting mobile phone signalsjammer If used for normal work, management personnel cannot immediately determine and know;

●closed to humansjammerThe process cannot be traced and checked

It is impossible to track and investigate more sophisticated acts of vandalism by prisoners or prison guards (for example, some prison guards cut off cells without supervision at night).jammer power on and restore again the next morningjammer normal power supply).

2.2 Install Weikai Prison Mobile PhonejammerAdvantages of intelligent management systems

●Each mobile phone signal blocking point effectively blocks all mobile phone signals currently on the market.

The mobile phone signal configured in this systemjammer It can effectively block GSM, CDMA, DCS, PHS, 3G, 4G and other types of mobile phone signals currently on the market, including: GSM (2G of China Mobile and China Unicom): 925-960MHZ; CDMA (CDMA 1X): 870 -880MHZ; DCS (2G auxiliary frequency band of China Mobile and China Unicom): 1805-1880MHZ; PSH (Personal Smartphone): 1900-1920MHZ; 3G (Mobile TD-SCDMA): 2010-2025MHZ;

Sub-area) switch, point-to-point switch

Managers can control the opening and closing of any shielding point accurately point-to-point or in groups (i.e. by area or building) through the main control software on the main control computer;

●Master it alljammer The operating status and fault status can be queried in real time, automatically queried, and automatically alarmed.

Administrators can query each mobile phone manually or automaticallyjammer working status, for malfunctioning or damaged mobile phone signalsjammer It can detect immediately. In the automatic query state, it can immediately provide sound and light alarms and clearly inform the faulty shielding points.jammer location;

●Timing switch and timing plan can be programmed arbitrarily, energy saving and environmental protection

Any point or group can be controlled with precise timing on and off through software; activating timing for some locations that do not need to be turned on continuously for many years will be beneficial to energy saving, environmental protection, and extending the service life of the equipment;

●The log function helps with tracking and troubleshooting

The complete system log function will record every mobile phonejammer work status, administrator or operator operation logs, and also has tracking and troubleshooting functions for more advanced sabotage behaviors (for example, a prison guard cuts off thejammer After the power is turned off and restored during the day, this process will be automatically queried and recorded in the log).

●Functions that can be expanded in the future: multi-level networking, data aggregation, and overall understanding

This is a scalable development function in the future and has not yet been put into use: since each prison system has an independent database, if there are multiple prisons in the province, the upper-level prison management department can in the future call each prison to The database of each prison is used to supervise the operation status of the shielding system of each prison.