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How to choose a wiring system? Detailed explanation of the three major integrated wiring systems

by:Keyable     2021-08-05
How to choose a wiring system? Detailed explanation of the three major integrated wiring systems The integrated wiring system is the physical infrastructure of an intelligent building. Generally speaking, there are the following three commonly used integrated wiring systems. They are optical fiber system, copper cable system, and shielded cable system. These three systems have their own characteristics. The following is a detailed introduction to these three cabling systems. 1. Optical fiber system Optical fiber is the best medium for information transmission. It not only has the incomparable advantages of copper cable system in terms of long-distance and high-speed transmission, but also differs from the rare resource of copper cable manufacturing, which is restricted by the raw material-copper metal. The manufacture of optical fiber is not limited by raw material resources. In addition, compared with copper cables, the size of optical cables is smaller, and there is no need to be limited by the number of connectors in the link when networking, and there is no need to consider problems caused by electromagnetic interference. With the trend of 'light entering copper and retreatingAs the price of optical fiber port equipment is still expensive, several times that of copper cable equipment for the same application, this has become the main reason why the optical fiber system cannot completely replace the copper cable system. Secondly, optical fiber installation requires professional practitioners to use special tools, and construction costs and requirements are relatively high. In addition, the optical fiber system cannot support the emerging and concerned PoE Power over Ethernet technology. For the optical fiber system in the data center, the general consensus in the industry is to recommend the use of OM3 laser to optimize the optical fiber system. This system can use VCSEL (Vertical Surface Laser Transmitter) light source to support 10Gb/s transmission at 850nm wavelength, and the distance can reach 300 meters. In terms of upgrades, some manufacturers have begun to surpass the 10Gb/s standard and use coarse wavelength division multiplexing technology to transmit 40Gb/s. Second, although copper cable systems are compared with optical fiber systems, copper cable systems suffer from transmission distance and the number of channel connectors. Limits, but the copper cable system is the most familiar to all designers, installers and users. It can realize high-speed applications in a low-cost manner. From 10/100/1000Base-T to 10GBase-T, copper cable systems can be well supported. In addition, the non-shielded system can support PoE applications, powering remote devices while transmitting data signals. When TIA issued the 942 standard in 2005, the 6A standard was still immature. Taking into account the market conditions at the time, in this standard, it is recommended to use category 6 or above cables. Today, Category 6A is the most economical link configuration method to achieve 10Gb/s transmission requirements. The system uses no more than twice the cost of Category 6 but provides 10 times the transmission capacity, so the cost per Gbps is lower. Much. Although Category 6 can also support 10Gb/s in a short distance, its noise suppression capability and transmission performance are far from 6A. Although the existing 10G copper port network equipment on the market is expensive, with the mass production of equipment manufacturers and the maturity of the market, the price will naturally decrease, just like the original gigabit port equipment. It is worth noting that due to the high power requirements of 10G transmission, the power consumption per port of the earlier transceivers even reached 10 to 15 watts. Therefore, the 'low-power short-distance transmission mode' is specified in the 10GBASE-T standard. Power consumption per port is reduced to 4 watts. The important point is that only cables of category 6A or higher can support this mode within a distance of 30 meters. 3. Shielded cable system It goes without saying that the shielding system has a good ability to resist electromagnetic interference and prevent information leakage. For the Category 6A shielding system that supports 10 Gigabit transmission, it is not necessary to consider the external crosstalk test, which will undoubtedly save a lot of test time. At present, the reason why the vast majority of domestic users consider using the shielding system lies in the consideration of information security. In addition, the shielding system can support higher bandwidth applications, up to 1.2GHz. However, the shielding wiring system also has its development limitations. First of all, the current global acceptance of the shielding system is low, and it may only account for 5% of the entire copper cabling system market share. This means that the design and installation personnel are relatively unfamiliar with it, and further training is required. To ensure the 360-degree continuity shielding effect of the shielding system, the shielding system must be installed and grounded correctly, which is difficult to construct and takes a long time. In addition, due to the existence of the metal protective layer, when the shielding system is used to support PoEPlus applications, the heat generated by the cable cannot be dissipated, which will cause a certain interference to the performance. Chengdu integrated wiring--Chengdu Ruiminle Technology Co., Ltd. is a company integrating Sichuan and Chengdu monitoring system installation and maintenance, monitoring equipment, camera camera installation, home security monitoring, access control system, weak current engineering, integrated wiring, video monitoring, alarm system, anti-theft system , Smart home as a multi-faceted technical service company, to provide you with satisfactory solutions. Welcome to inquire!
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