What is a cross line? How to cross a line?

What is a cross line?

The cross-over cable is a commonly used computer-to-computer direct connection line. One end is pressed according to t-568b, and the other end is pressed according to t-568a.

Straight-through cable is a commonly used computer-to-switch connection, and the line sequence suppressed at both ends should be suppressed according to the t-568b method.

And these two methods of suppression I mate are called twisted pairs

The following teaches the production method:

Twisted pair is a crystal head RJ45. There are two ways to play, one is 568A, the other is 568B.
Standard 568A: orange-white--1, orange--2, green-white--3, blue--4, blue-white--5, green--6, brown-white--7, brown--8;
Standard 568B: green-white--1, green--2, orange-white--3, blue--4, blue-white--5, orange--6, brown-white--7, brown--8.

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