dojammer's blog
Wireless walkie-talkie signal coverage system
This design is designed according to the full range of indoor and outdoor coverage of the building. Specifically, it includes: the upper floors of the building, the air defense layer, the outdoor park and the beach area; covering public areas, guest room floors, elevator halls, stairwells, machine rooms, etc. If necessary , our company will organize personnel to carry instruments to carry out field tests of this project to ensure that there are no blind spots in the coverage area.
Combined with the digital intercom communication system, a new generation of digital intelligent patrol dispatching management system is tailored for property security users. The new generation of patrol system combines wireless communication technology with the traditional patrol system to realize digital intercom and patrol Great combination of two into one. wifi jammer, The patrol information is sent back to the patrol dispatching station in real time through the short data transmission function of the digital intercom system, so as to truly realize the real-time online monitoring of the patrol personnel. At the same time, the digital voice provides users with more Clear sound quality more effectively guarantees dispatching and commanding.
(1) Adopt the digital wireless intercom system base station inter-frequency transfer technology to expand the communication range of the intercom
When the communication between the walkie-talkies cannot be realized due to the long distance or the obstruction of buildings, the base station can transfer the signals of the walkie-talkies in different frequencies, and then send the signals through the distribution system, thereby expanding the communication distance between the walkie-talkies;
(2) The underground parking garage of the building is equipped with a distribution system to solve the problem of signal shielding in the basement. The distribution system consists of an indoor omnidirectional antenna, a flat-panel directional antenna, a coupling distributor, a power distributor, a trunk amplifier, a connector, a low-loss radio frequency cable, and a leakage cable. gsm jammer, Combined with national electromagnetic radiation standards and building structure, antennas are distributed in every corner of the basement, and then connected to the center of the base station through cables, so that wireless signals can be received or transmitted through the antenna, so as to reach the entire basement area of the building The wireless signal coverage; the outdoor area of the building adopts a low-power outdoor omnidirectional antenna, and the output power is adjusted through calculation to ensure that the entire outdoor area of the building is covered, and at the same time there will be no signal leakage out of the peripheral area of the building.
(3) Shared system to increase communication capacity
The shared system is composed of a combiner, a splitter and a signal tandem controller, which can integrate up to eight digital base station signals into the same distribution system for reception or transmission, saving materials, repeated wiring, debugging and other unnecessary investment, thereby reducing costs;
(5) Wireless intercom patrol system
Under this system, real-time patrol management can be realized by adding patrol dispatch management center, patrol software, information button, and patrol walkie-talkie.
Combined with the actual communication application requirements of the building, a variety of wireless communication coverage schemes in the building have been formulated. The following principles are adopted for the construction of the scheme:
1. Sex principle:
The system as a whole must have a certain level from resource allocation (including hardware equipment, technical means) to functional use.
2. Reliability principle:
The reliability of various resources of the system, including hardware equipment, etc. must have a certain high standard, work stably, and be easy to maintain; in the event of a hardware failure, there must be a reliable backup means.
3. The principle of technological maturity:
The system should adopt mature technology as far as possible, so that it can be put into practical use after completion and achieve the designed use effect.
4. Scalability principle:
The overall structure of the system is reasonable, the design capacity is moderate, and it must be scalable. On the premise of protecting the original investment, resource expansion can be increased, including the increase of communication coverage and distance.
Nowadays, mobile phones have become an indispensable part of people. Almost everyone has a mobile phone. The birth of mobile phones has brought great convenience to our lives and created many opportunities for people to communicate. But everything will have good and bad sides, and many problems will appear under the premise of bringing convenience to people. For example, cell phones are not allowed in schools, and cell phones are supervised in detention centers and the military. Special venues such as examination rooms and prison cells will use full-band signal jammers or devices that shield mobile phone signals, so that communication with outsiders can be effectively avoided.
There are many important things in our life, and some things will always affect our whole life. For example, the college entrance examination that each of us has experienced is one of the most important things in life. In order to prevent unfair and just situations such as cheating during the college entrance examination, now every exam room will install a cell phone signal jammer to interfere Block mobile phone data signals to prevent cheating in the examination room.
In some special areas, the control of mobile phones is relatively strict, such as prisons, police stations and other special control areas. The full-band signal jammers installed in these areas are the last natural barrier to prevent criminals and suspects from contacting the outside world. Behavior for social stability.
There are also some very special areas, such as military and state secret places, and the core of test papers, which assemble full-band jammers, which can prevent leakage and loss of key materials. When important meetings of government agencies and enterprises are held, mobile phones are used casually, making the meeting unable to proceed normally. However, in order to concentrate the attention of the participants, it is necessary to be equipped with a full-band jammer.
In addition to the places mentioned above, mobile phones are prohibited at gas stations. We all know that talking on the phone at a gas station can also cause fires and explosions, but there are also people who use mobile phones regardless of the danger. Therefore, it is necessary to install a full-band jammer at the gas station.
GSM connections in Moldova are deliberately interrupted by the de facto independent and internationally unrecognized region of Transnistria (de facto).
Mobile phone customers and network operators in Moldova (Moldova, approx. 4.3 million inhabitants) have big problems with GSM whining. GSM connections in Moldova are deliberately interrupted by the de facto independent and internationally unrecognized region of Transnistria (de facto). gsm jammer, In early September, the transmission power of jammers active for three years increased threefold, which significantly worsened the situation in Moldova. GSM network operators suffer heavy financial losses and communication is made more difficult.
In addition to technical measures, grid operator Moldcell has now also had to give in to tariffs in order to appease obviously upset customers. By realigning existing transmitters as well as 15 new base stations and 36 new antennas, the rate of dropped calls was officially reduced from 6.8% to 4.9%, in Chisinau, the capital, particularly affected by the misdeeds of radio, at 3.9%. This value is still very high compared to Western European GSM networks, as it means that every 20th to 25th call drops.
In mid-September, Moldcell had explained to its customers the cause of the problems and countermeasures by sending a message to all TV programs. However, public understanding is likely to be limited, which is why price reductions were now necessary at least until the end of the year. Some base fees have been reduced to zero, while other rates allow unused free minutes to be rolled over to the next month. Vouchers for prepaid customers now offer 45 minutes instead of 15 minutes of talktime for the same price. At the same time, the provider emphasizes that the problems are not to blame. gps jammer
While the Communist Party rules with an absolute majority in the Romanian part of Moldova (west of the Dniester), the narrow strip of land between the Dniester and the Ukrainians is mainly populated by Ukrainians and Russians. They have aspired to independence for years and in fact have control of the region. There is also its own mobile network, which works with the CDMA process in the 800 MHz band and therefore is not affected by the GSM jammer in the 900 MHz band. Besides the political background of constant disruption, pecuniary crime in the form of extortion from GSM network operators cannot be ruled out.
Cell phone signal jammers are used more and more. In addition to the general test site, they are also used frequently in competition sites from all walks of life. The 2022 Huawei Mobile Cup China Go League One, which is currently being held in Chengdu, has adopted a number of anti-cheating measures, and installed a mobile phone signal jammer in the bathroom for the first time to cut off the possibility of AI cheating from the source.
According to the relevant regulations of the Go competition, players must take out their mobile phones before entering the arena and hand them over to the staff for safekeeping. This year's Siege League matches are played in the same hotel as the chess players' land, and chess players are required to leave their mobile phones in the room as required and are not allowed to bring them into the arena.
Like most Go tournaments, this year Siege installed a security gate at the entrance of the arena. Players must go through security checks before entering the arena. Once the alarm sounds, the staff will check it by hand, and the players can enter the arena only after confirming that it is correct.
In addition to conventional security measures such as security gates and surveillance cameras, there are also full-time referees on site to supervise and patrol the Siege League. During the game, all chess players are not allowed to leave the arena area, and are limited to activities in the arena and toilet area. Once a chess player is found to return to the room privately during the game, he will be sentenced to lose.
In addition to strict requirements for chess players, team leaders, coaches, media and other relevant personnel must leave the arena 30 minutes after the start of the game. Even for the rapid chess match that started at 13:00 that day, relevant personnel were no longer allowed to enter the arena.
Unlike most sports, a game of Go usually takes five or six hours to play. During this period, players will drink tea and coffee to refresh themselves, and it is inevitable to go to the bathroom several times. In the AI era, there have been chess players cheating in the bathroom. However, in view of the violation of personal freedom and the cost of installing signal jammers, few events have adopted relevant anti-AI cheating measures in the bathroom before.
For this year's Siege League, the organizer Chengdu Chess Academy installed mobile phone signal jammers in the bathroom of the arena. After entering the bathroom, the mobile phone signal disappears immediately, and you cannot access the Internet or make calls, cutting off the possibility of AI cheating from the source. According to relevant staff, mobile phone signal jammers will become one of the conventional means of preventing cheating in Go games in the future, so as to avoid cheating as much as possible.
