The Circular on Prohibiting the Illegal Development, Production and Use of Radio Jamming Equipment (No.[200 1] 439 of the Ministry of Information Industry) issued on June 4, 2000/KLOC-0 clearly stipulates that social institutions shall not install and use mobile phone signal shields without legal procedures.

The main contents are as follows:

Using radio jamming equipment to transmit the same frequency radio signal with a wider frequency band than GSM900mHz and DCS 1800mHz has blocked the incoming and outgoing calls of mobile phones in a certain range, disturbed the radio wave order and seriously violated the legitimate communication freedom of mobile phone users, which must be stopped according to law.

Radio management agencies at all levels should take decisive measures to resolutely stop the illegal development, production and use of radio jamming equipment and protect the normal use of radio stations (stations) set up according to law. Radio jamming equipment should be developed and produced from the source, and illegal development and production should be resolutely stopped; Users who use radio jamming equipment without authorization shall be punished for setting up stations without authorization and interfering with radio services.

According to the constitution of China.

Fortieth the freedom and privacy of communication between the people of China and the citizens of People's Republic of China (PRC) shall be protected by law. When public security organs and procuratorial organs check communication according to the procedures prescribed by law, no organization or individual may infringe upon citizens' freedom and privacy of communication for any reason, except for the needs of national security or criminal investigation.

Extended data:

20 14 14 10, the staff of Chengyang Communication Company received more than 200 complaints from citizens. Their mobile phones can never be dialed out, and even if they can be connected by accident, the signal quality is poor. Mr. Liu from the street where this happened said that he wanted to talk about business cooperation with his business partners on the phone, but many calls were unsuccessful. Finally, he had to find a fixed telephone to call the other party.

"There is a communication base station not far from my home. Even if I went to the underground warehouse, I could connect normally, but I couldn't make a phone call from 9: 00 am in those two days and returned to normal after 5: 00 pm. " Mr. Liu found that as long as he stayed away from Ma Shang Middle School, his mobile phone could be restored to normal. Once he is close to the school, his mobile phone is not used at all.

Tracking anti-cheating private jammer

The staff of the communication company found that the communication base station was running well, and the residents who complained were concentrated around Ma Shang Middle School. The communication company turned to Chengyang Radio Management Committee for help, and the staff of the Committee rushed to the scene. "We tested it with professional equipment and found that someone around us was using jammers."

Li Ke, deputy director of the committee, told the reporter that they soon found the jammer with radio direction finding and positioning equipment, which is in the teaching building of Ma Shang Middle School. The person in charge of the school said that they were in the final exam. In order to prevent students from cheating with their mobile phones, they bought a jammer and installed it.

Because the person in charge of the school knew little about the laws and regulations of jammers and did not cause serious economic losses, the staff of the Committee confiscated the equipment and criticized and educated the person in charge of the school.

Some companies in the case are also stealing it.

The jammer can successfully intercept mobile phone signals, and this function has also been favored by some enterprises. Li Ke told reporters that at the end of last year, a Korean company manufacturing luggage in Xifu Town, Chengyang reported that the mobile phone could not be used normally when it was close to the company. The staff rushed to the scene and found it was a jammer.

They quickly found two mobile phone signal jammers equipped with professional equipment, which were in the men's and women's toilets in the enterprise workshop. In this regard, the person in charge of the company said that since most employees are young people, they use their smartphones to surf the Internet whenever they have time, which affects work efficiency. Many employees took advantage of the leader's inattention and ran to the toilet to play with their mobile phones for a long time, so they installed jammers in the men's and women's toilets.

Coincidentally, a Korean company in Xiazhuang also used the same method, except that they installed jammers at both ends of the workshop to prevent employees from playing mobile phones during office hours. Committee staff confiscated the equipment and educated the heads of the two enterprises. Harm seriously threatens public safety.

According to the reporter's online inquiry, there are many phenomena of selling mobile phone signal jammers online, and the prices are cheap. Many of them are in 300 yuan, and the most expensive one is only 1000 yuan. Most of these jammers are produced in Guangdong and Fujian. A seller in Shenzhen told reporters that the frequency bands interfered by jammers are different and can be customized according to the buyer's requirements.

"China Unicom, China Mobile and China Telecom have different cell phone signal frequency bands. Better machines can block the signals of these three companies at the same time. Now we have also developed some jammers to shield the frequency of the walkie-talkie, and even the signal of the radio can be shielded. "

According to Li Ke, the manufacturers of jammers are mostly underground factories in the south. These jammers are powerful, which not only directly affects the public communication order, but also affects the security of some important departments in the country. "Take the airport as an example. If the communication safety of the airport is disturbed, the navigation communication of the aircraft will be blocked. During the landing of the plane, the signal loss of 5 seconds will also cause the plane to be destroyed. " ?

You can't just install jammers in the college entrance examination.

"Everyone knows the harm of pseudo base stations, but few people understand the harm of jammers, and most of them use large units." Li Ke told reporters that jammers and pseudo base stations work in exactly the same way, but they don't send spam messages.

In the past, some party and government organs used jammers to keep secrets in meetings, and then they realized the harm and completely banned it. But now educational institutions frequently use jammers, and more and more schools use jammers in exams to prevent students from cheating, which is illegal.

"Even the college entrance examination, also can't literally use jammer. It is illegal for the college entrance examination test center to use jammers without approval. " Li Ke said that during the college entrance examination, the education department must apply to the Security Bureau and the Radio Management Committee at the same time. After approval, the Committee staff must be present for installation and debugging, and strictly control the shielding scope.

"The installation and debugging of anti-cheating jammer is very important. We have to go through countless tests until the scope is completely locked in the examination room, otherwise it will have a serious impact on social interaction. " Li Ke said that the committee will publicize the law in the society, distribute relevant laws and regulations to schools, and urge installed schools to dismantle illegal jammers.

Baidu Encyclopedia-Constitution of People's Republic of China (PRC)

Qingdao news network-school anti-cheating shielding signal illegal college entrance examination can not be used casually