What is a PoE switch? What is its role?

PoE is also referred to simply as Power over Ethernet. It refers to the technology of transmitting power to devices through twisted pair in Ethernet. It does not need to change the existing Ethernet cabling infrastructure, but also transmits data signals for some IP-based terminals. At the same time, it can also provide DC power for such devices. Through this technology, it is possible to supply power to network telephones, wireless base stations, network cameras, hubs, computers, etc., which are inconvenient to install additional power cords.

Compared with traditional switches, PoE switches have the PoE function. Power is supplied directly through the network cable, which greatly simplifies the wiring and reduces costs. It is loved by many people and removes relatively large brands such as Huawei and Cisco. The leading brand of PoE switches is also quite rich. Popular, widely used in the security industry. It can be seen that PoE power supply is developing very rapidly.

Terminal devices such as wireless APs, IP phones, and web cameras are usually numerous in number, have a special location, and are difficult to take power. Their implementation and deployment not only consumes manpower and material resources, increases network construction costs, but also delays construction time. PoE technology eliminates the problem of installing a separate power supply device on each terminal device through a remote power supply method. This eliminates the need to deploy a separate power supply system for the device at the site of use, which greatly reduces the number of wirings for deploying terminal devices. Management costs have promoted the development of related fields and business development.

Simply put, PoE switches can power network cameras, wireless APs, and Internet telephony and other network devices, eliminating the need for complicated power cabling, simplifying construction and making it easy to use.

However, PoE power supply is not 100% useless. When purchasing, it is not only necessary to supply the quantity and power of the power supply equipment, but also the power supply distance must be within 100 meters. If the selected PoE switch has insufficient power, or exceeds 100 meters, Or the poor quality of the network cable will greatly affect the monitoring project.

In chemical reactions reactants can change the chemical reaction rate (increase or decrease) without changing the chemical equilibrium, and its own quality and chemical properties of the chemical reaction did not change before and after the catalyst called (solid catalyst also called catalyst). According to statistics, about 90% of the industrial process using catalysts, such as chemical, petrochemical, biochemical, environmental protection and so on. [1] A wide range of catalysts, according to the state can be divided into liquid catalyst and solid catalyst; according to the reaction system is divided into homogeneous phase homogeneous catalyst and heterogeneous catalyst, homogeneous catalyst with acid, alkali, soluble transition metal compounds and peroxides catalyst. Catalysts occupy an extremely important position in the modern chemical industry. For example, three catalysts, namely, an iron catalyst for ammonia production, a vanadium catalyst for sulfuric acid production, ethylene polymerization, and three synthetic materials such as butadiene rubber are used .

Catalysts And Auxiliaries

Catalysts And Auxiliaries,Trimethylamine Hydrochloride,Tetrapropylammonium Bromide,Benzyltri N-Butylammonium Chloride

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