RJ45 connector definitions and principles!

Do you know how the RJ45 socket works? There are socket interface definition is what and so on. If the non-professional technical personnel, I believe that you should understand its related technical knowledge should be little, the following small series to give you a detailed explanation of RJ45 socket working principle and interface definition analysis. RJ45 socket interface definition RJ45 interface is usually used for data transmission, the most common application for network card interface. RJ45 is a type of different connector (for example: RJ11 is also a type of connector, RJ45 head according to the sort of line there are two different methods, one is orange white, orange, green white, Blue White, green, brown white, Brown; the other is green white, green, orange white, blue, Blue White, orange, brown white, Brown; so RJ45 connector line also has two: straight line, interleaving. Common RJ45 socket two kinds of interface: general application network card, Router Ethernet interface, and so on DTE type, and for switches and so on DCE type. DTE we can call“Data terminal device”, DCE we can call“Data communication device”. In a sense, DTE devices are called“Active communication devices” and DCE devices are called“Passive communication devices”. When two devices of the same type communicate using the RJ45 interface, you must use a cross-wire connection.

About the problem of RJ45 socket line sequence UTP network line by a certain length of twisted-pair and RJ45 crystal head, twisted-pair by eight different colors of the line divided into 4 pairs of twisted together, the effect of pair twisting is to minimize the effects of electromagnetic radiation and external electromagnetic interference. RJ45 crystal head access network card or HUB and other network equipment within the RJ45 socket. Accordingly, RJ45 plugs are also divided into three or five categories of electrical characteristics. The RJ45 crystal head is made of metal sheet and plastic. There are 8 concave monks at the front end of the RJ45 crystal joint, which is called“SE”(Position) . There are eight metal contacts in the groove, called“8C”(Contact) , so the industry has a nickname“8P8C”. Note in particular the RJ45 crystal pin number, when the metal face us from left to right pin number is 1-8, serial number for the network connection is more important, if there is a connection error, may cause damage to RJ45 socket. RJ45 socket working principle analysis the working principle of POE in RJ45 socket filter is to provide power supply for access point (wireless access point) through network cable, there is no need to connect the power cable alone, now many enterprises have started to use RJ45 socket filter Poe to reduce the cost of setting up a wireless area network, because the use of RJ45 socket POE technology can greatly save the purchase and installation of a large number of power sockets and power cables of the huge costs and complicated lines, and ensure the reliability of power supply sources. RJ45 socket in daily life is a common network socket, with the rapid development of the electronic age, RJ45 socket in the demand of electronic equipment is relatively large.