Little secret of the RJ45 connector

Little secret of the RJ45 connector

2019-01-31 15:02:27

      

Little secret of the RJ45 connector

There are two types of twisted-pair cables for RJ45 connectors: one is a widely used straight cable, and the other is a crossover cable used in special cases. If it is a pc-connected switch or other network interface, or other connected Straight links are used when the status is not equal. If the two devices connected are equal, for example, two PCs, notebooks, etc., the crossover line is used. The difference between the two is that the line order is inconsistent. The interface is the same.
The practice of crossing lines is:

 

 


One adopts 568A standard, 568A standard practice: green white-1, green-2, orange white-3, blue-4, blue and white-5, orange-6, brown white-7, brown-8
One adopts 568B standard, 568B standard practice: orange-white-1, orange-2, green-white-3, blue-4, blue-white-5, green-6, brown-white-7, brown-8
Parallel lines are: the same standard is used at both ends (the same as the 568A standard or the 568B standard)
☆ When connecting to Gigabit network, it is slightly different: one is: white orange, orange, white green, blue, white blue, green, white brown, brown; the other is: white green, green, white orange, white brown, brown , orange, blue, white and blue.

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