The RJ45 interface, also known as the crystal plug, is a kind of information socket (that is, the communication terminal) connector in the wiring system. It consists of a plug (connector, crystal head) and a socket (module). The plug has 8 grooves and 8 contacts. point. It and the socket (RJ45 module) together form a complete connector unit. This kind of connector is widely used in the network cable connection between the local area network and the network equipment of the ADSL broadband Internet users, and is called the five-level cable or twisted pair.
The RJ11 interface is very similar to the RJ45 interface, but only has 4 pins. At the same time, there are other differences between them. The two types of connectors have different standards and different sizes. RJ11 is a 4 or 6-pin, RJ45 is an 8-pin connection device. Because the RJ45 jack is slightly larger than the RJ11 plug, some people mistakenly believe that the two jacks should or can work together. Make the act of inserting the RJ11 cable into the RJ45 port. In fact, the two are not compatible. If you use the RJ11 plug on the RJ45 jack forcibly, it will only cause both of them to fail to work. Even cause damage to both. In actual use, RJ45 connectors are mostly used to connect computers or other network components, while RJ11 is only used for telephone, ADSL and modem cable connections.
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