1. Anti-interference ability, easily caused by high frequency interference or other effects of false positives and false negatives. I measured a number of wireless alarm systems, and some products may cause alarms when they are at a distance of about one meter.
2. Non-specialized installation, poor anti-vandalism. Almost all of the wired professional alarm consoles use a separate host and keyboard structure. The mainframe adopts a metal chassis and has a chassis tamper or integral tamper function. During the installation, the host generally recommends concealed installation. Only the keyboard is in a conspicuous place, and the keyboard also has a tamper-proof function. This structure can better prevent intruders from destroying the host. Wireless alarm consoles are almost all integrated into the mainframe and keyboard (some without a keyboard). They are made of plastic and have attractive appearance. They are generally installed in a more conspicuous position. This structure is very vulnerable to intruders. And most wireless hosts use standard connector wiring. An intruder can stop the alarm simply by unplugging the telephone line alarm line.
3. The same frequency interference problem, this is the fatal weakness of the wireless alarm system, as long as the same remote control button is pressed, the host system can not receive the alarm information from the detector correctly because the same frequency interference, the entire system will be invalid Now. For this problem, some manufacturers have adopted the method of interference identification and alarming. That is, when the host computer finds that there is continuous interference for a long time, it is considered that someone intentionally interferes with sending out the alarm. This method can solve the malicious interference problem to some extent. However, the time for identifying interference is generally more than 30 seconds. This time is enough to destroy the host.
4. In terms of confidentiality, most domestic wireless hosts use 2262 remote control chips. The code system is 8-bit ternary and only has a total of 6,000 codes. The probability of re-encoding is relatively high. There is no doubt that the number of users in the community is large. increase. This code system is also very easy to use the code to crack. Security is also poor. With a small number of products using rolling codes, confidentiality has been greatly enhanced.
5. Trigger delay, in order to save power, almost all wireless detectors have used the trigger delay technology, that is, will not be triggered for a period of time after a trigger, this delay is generally 2-4 minutes, the intruder as long as the interference The first trigger has enough time to destroy the host.
6. Backup battery problem. The wired host generally uses a 4-7AH battery, which can achieve continuous operation for more than 18 hours when a power failure occurs. Because of the volume problem, the wireless host can only use a small-sized battery, such as a 5th battery for backup. In order to reduce the cost of sales, some manufacturers do not use batteries when they leave the factory. Users use non-rechargeable batteries as backup batteries. Some manufacturers also use rechargeable batteries with poor quality. After several times of charging, the battery supply time is greatly shortened, and the technical protection requirements for continuous power failure for 18 hours cannot be met.
7. Link transmission capacity issues. A part of the wireless host does not have networking transmission capabilities. It can only make a local alarm or call a user. Among the products with networking transmission capabilities, some use custom protocols, and there are problems with compatibility and networking capabilities. Some support standard protocols such as cid and 4+2 transmission formats. However, the standard transmission function is generally reduced, and much information can be transmitted.
In summary, wireless alarm systems have many gaps compared to wired systems. I think they should be positioned as civilian-level products and professional-grade products. If the security requirements are higher, use professional-grade wired products. If it requires simple installation and operation, and beautiful appearance, it will use civil-grade wireless products.
In fact, there are still many wireless products that do well. Some unique technologies such as anti-collision interference technology, two-way wireless technology, etc. are used to solve or balance the security problems of wireless systems. Makes system security greatly improved.
2. Non-specialized installation, poor anti-vandalism. Almost all of the wired professional alarm consoles use a separate host and keyboard structure. The mainframe adopts a metal chassis and has a chassis tamper or integral tamper function. During the installation, the host generally recommends concealed installation. Only the keyboard is in a conspicuous place, and the keyboard also has a tamper-proof function. This structure can better prevent intruders from destroying the host. Wireless alarm consoles are almost all integrated into the mainframe and keyboard (some without a keyboard). They are made of plastic and have attractive appearance. They are generally installed in a more conspicuous position. This structure is very vulnerable to intruders. And most wireless hosts use standard connector wiring. An intruder can stop the alarm simply by unplugging the telephone line alarm line.
3. The same frequency interference problem, this is the fatal weakness of the wireless alarm system, as long as the same remote control button is pressed, the host system can not receive the alarm information from the detector correctly because the same frequency interference, the entire system will be invalid Now. For this problem, some manufacturers have adopted the method of interference identification and alarming. That is, when the host computer finds that there is continuous interference for a long time, it is considered that someone intentionally interferes with sending out the alarm. This method can solve the malicious interference problem to some extent. However, the time for identifying interference is generally more than 30 seconds. This time is enough to destroy the host.
4. In terms of confidentiality, most domestic wireless hosts use 2262 remote control chips. The code system is 8-bit ternary and only has a total of 6,000 codes. The probability of re-encoding is relatively high. There is no doubt that the number of users in the community is large. increase. This code system is also very easy to use the code to crack. Security is also poor. With a small number of products using rolling codes, confidentiality has been greatly enhanced.
5. Trigger delay, in order to save power, almost all wireless detectors have used the trigger delay technology, that is, will not be triggered for a period of time after a trigger, this delay is generally 2-4 minutes, the intruder as long as the interference The first trigger has enough time to destroy the host.
6. Backup battery problem. The wired host generally uses a 4-7AH battery, which can achieve continuous operation for more than 18 hours when a power failure occurs. Because of the volume problem, the wireless host can only use a small-sized battery, such as a 5th battery for backup. In order to reduce the cost of sales, some manufacturers do not use batteries when they leave the factory. Users use non-rechargeable batteries as backup batteries. Some manufacturers also use rechargeable batteries with poor quality. After several times of charging, the battery supply time is greatly shortened, and the technical protection requirements for continuous power failure for 18 hours cannot be met.
7. Link transmission capacity issues. A part of the wireless host does not have networking transmission capabilities. It can only make a local alarm or call a user. Among the products with networking transmission capabilities, some use custom protocols, and there are problems with compatibility and networking capabilities. Some support standard protocols such as cid and 4+2 transmission formats. However, the standard transmission function is generally reduced, and much information can be transmitted.
In summary, wireless alarm systems have many gaps compared to wired systems. I think they should be positioned as civilian-level products and professional-grade products. If the security requirements are higher, use professional-grade wired products. If it requires simple installation and operation, and beautiful appearance, it will use civil-grade wireless products.
In fact, there are still many wireless products that do well. Some unique technologies such as anti-collision interference technology, two-way wireless technology, etc. are used to solve or balance the security problems of wireless systems. Makes system security greatly improved.
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