In the information age, with the rapid development of communication technology, mobile phones have become an indispensable tool in people's daily work and life. However, the widespread use of mobile phones has also produced some problems that cannot be ignored, mainly as follows:
1. Become a new leak channel, posing a threat to the security of confidential information. With the development of science and technology, the positioning, tracking and monitoring of mobile phones have become the most important investigative methods and sources of intelligence in countries around the world. Therefore, as long as the mobile phone is carried in a secret-related place, whether it is used or not, as long as it is in standby, it is extremely likely to cause a leak, causing serious harm to the unit or individual, and even to the party and the state.
2. Become a new criminal method, which has an impact on social stability. Some opportunists use mobile phones to conduct exams, and some terrorists and hostiles even use mobile phones to detonate bombs. Facts have shown that mobile phones have become a tool for criminals to commit crimes on some occasions, which has adversely affected social stability.
Based on the above background, Beijing Shenzhou Mingda has developed a cell phone jammer system, which is mainly composed of three parts:
1. Base station
The base station is mainly used to generate the downlink signal of the GSM mobile communication system and receive the uplink signal of the mobile phone communicating with the base station, so as to transfer information with the control server of the mobile phone.
Two, control server
The main functions of the control server are divided into four categories:
1: Manage the operation and maintenance of the base station
2: Manage and control the mobile phones within the coverage of this base station, including classified management of the mobile phones within the coverage of this base station (accept or reject, allow or prohibit their communication, etc.), status monitoring (network access, online, offline, etc.) Network, communication, etc.) and monitoring, SMS auditing, positioning, etc.
3: Store and manage control data;
4: Management and control authority management to prevent illegal access and control to the management and control server.
3. Antenna feed system
The antenna feeder system mainly completes the coverage of the base station signal. The outdoor mainly uses the directional antenna, and the indoor mainly uses the indoor distributed system, and it can also be shared with the existing indoor distributed system.