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Analysis of Factors Affecting the Use of Wireless Bridges in Wireless Surveillance System
First: Camera Cause
There is a situation that causes the image to be unclear, that is, the camera selected by the customer itself does not perform well. Customers will also bear the brunt of the fact that your bridge will not work well, and the images passed will not be clear at all. The wireless bridge is also just a transmission device. The only function that can be used is the transmission function. It only faithfully transmits the signal of the camera. If the camera's own pixels are only 720P, it may not be required to achieve the effect of 1080 after transmission through the wireless bridge. It.
Second: the choice of connection cable
At present, most of the cameras are high-definition cameras. Therefore, cables used in the construction of monitoring systems must use Super Category 5 or Type 6 cables to ensure stable signal transmission. Moreover, the length of the cable is also required. The length of the network cable from the network camera to the wireless bridge must not exceed 80 meters. The length of the network cable between the wireless bridge and the POE power supply module must not exceed 20 meters. The communication between the wireless bridge and other devices must use a straight-through connection. From our experience, when debugging for customers, we will find that customers are very casual with regard to the cables they connect. They only use ordinary cables for transmission, but they blame the wireless bridges and wireless bridges for problems. Really is awkward.
Third: The choice of switch
The importance of the switch does not need to be repeated. I specifically devoted myself to discussing its role and importance, and even the method of selection. Because some people disagree, and the switch carries the mission of concentrating data, it can be described as a pivotal task. Therefore, it must be emphasized once that the switch must not use a casual one. For digital wireless monitoring systems, not only should a stable wireless bridge be selected, but the configuration of the switch should not be too bad. First, the switch should be selected according to the number of front-end transmission images and the total bandwidth of the front-end equipment. When choosing a switch, pay attention to the backplane bandwidth of the switch and the packet forwarding rate. To meet the transmission requirements, you can ensure the stable transmission of signals. If the requirements are not met, there will be problems such as delay or packet loss in image forwarding.
Fourth: The problem of bandwidth
In practical use of wireless bridges, configuring a high wireless bridge can be used for multiple applications, but the premise is that bandwidth can keep up. It is not unlimited, but also depends on the size of the front-end data to configure the wireless bridge. It is recommended to use four-in-one and one-receiving methods for multiple receiving and receiving under sufficient bandwidth conditions.
Fifth: The performance of the device itself
Wireless monitoring equipment is divided into low-end, mid-end, and high-end types. Generally, the transmission distance is relatively short. When the amount of data transmitted is small, the use of low-end products still meets the basic requirements, but the stability is not guaranteed. The requirements for the performance of the bridge equipment for transmitting video signals are relatively high. Therefore, it is better to choose a mid-to-high-end wireless bridge to build a wireless monitoring system to ensure the stability of the system. The so-called one penny goods.
Sixth: Installation and Debugging
Installation, a simple look, I feel everyone will, in fact, experienced and inexperienced technical staff, in the same equipment, the effect of installation is still a certain gap. Personal advice, if there are relatively many wireless video points, and you are involved in the wireless video surveillance industry, it is best to ask a professional to help you debug. Commissioning, mainly pay attention to the following: frequency, channel, power, it is recommended that you contact the manufacturer's technical staff before installation.
---- Please pay more attention to Xi'an Yunan Security Technology Co., Ltd.! The company's main business projects include network high-definition video surveillance, integrated cabling, parking management, enterprises and community card, access control attendance, building video intercom systems, perimeter security alarm, electronic patrol and other weak systems engineering.
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