What is RJ45?
In reality, there are actually several RJ (Registered Jack) interfaces ranging from a RJ11 through to a RJ61. However, because of the similarity in appearance of these cables they are often referred to as RJ45’s. The most commonly used jacks are the RJ11, RJ14, and RJ25 and are used to connect telephone lines to computers. They are also used for connecting multiple computers to form a wired network. In realty, the RJ45 is used with the same regularity as the other RJ cables but it is a standard connection between modern telephone lines, Ethernet, and Internet connections. Cable lengths can vary dramatically depending on the application and are available in various guises. These include unbooted, injection moulded, and shielded cables. Shielded cables should be used when electromagnetic interference may be an issue.
