RJ45 is used to connect Ethernet port on your computer. There are two configuration: straight and cross. Straight RJ45 cables should be used to connect between computer and device such as switch or hub, and cross RJ45 cables should be used in computer-to-computer connection. Some hub or switch has the capability to detect the cable type and accept both straight and cross RJ45 cables. Here is the RJ45 pin and wiring diagram: Read Full Story
This pin diagram will be useful when viewing these connectors. Sometimes you hold a soldering iron to the back of the connector, and you don’t remember the numbering of the pin. Here is the pin diagram for your reference:
The number of each pins are actually stamped on both sides of any D-type connector. Unfortunately, since they are only moldings, they are very difficult to see as they have no color difference.
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