With the increasingly popular use of mobile phones, the number of mobile users in China has exceeded 900 million a few years ago. At present, the automation functions of mobile phones are constantly expanding. In addition to the basic voice call and short message functions, they also enjoy more application functions such as digital cameras, surveillance cameras, tape recorders and Internet access. The application of these smart phones has greatly facilitated the exchange and communication between people, facilitated the carrier of information, and enriched people's lives. However, while mobile phones actively promote social development, there are many drawbacks brought by the proliferation of mobile phones. For example, in the production workshops or assembly lines of some large factories and enterprises:

Then why install telephone jammers in the plant:

1. When workers are in production, they often stop their work to answer mobile phones or reply to text messages because of a sudden call or text message.

2. Although some factories or enterprises require workers not to use mobile phones when working, there will always be people who take the opportunity to secretly use mobile phones.

3. Some workshops require a quiet operating environment, which often disrupts the working environment and affects the normal work of others due to a sudden ringing of an incoming call.

4. In some flow production lines, an employee's answering a phone call or browsing a mobile phone will cause the continuity of the whole assembly line and affect the production efficiency.

5. The product production and processing process, processing technology and product data of some enterprises belong to the business secrets of the enterprise, but they may be easily leaked by individual employees with ulterior motives using the functions of smart phones such as taking photos and cameras.

6. Some chemical enterprises that produce explosion-proof and flame-proof products should strictly restrict and eliminate the use of mobile phones in their factories.

To sum up, the widespread use of mobile phones is a double-edged sword. The benefits brought by mobile phones need not be described too much, but for some special places, the use of mobile phones should be restricted or even prohibited. In some special places, such as factories and workshops, the use of mobile phones is restricted. According to the traditional rules and regulations, personnel supervision, and punishment system, the proliferation of mobile phones can not be completely eradicated and eliminated. At present, from the perspective of technical products, the more feasible way is to install mobile phone shielding equipment at the appropriate position in the factory. Each telephone jammer can cover a certain range, These coverage areas are formed into area coverage in the form of cellular networking to achieve complete signal shielding of large areas.

The current telephone jammers have been able to effectively shield all kinds of mobile phone signals on the market: GSM (mobile, Unicom), CDMA, DCS (1800MHz), PSH (PHS), 3G (including TD, WCDMA, CDMA200), 4G, 5g, etc. If the customer needs to increase the shielding of WiFi and Bluetooth, it can also be added to the telephone jammer.