Strange network cable. Let's talk about this.

Twisted pair is twisted inside, in which 12 36 45 78 is a pair.

Conventional cables are: white orange, orange, white green, blue, white blue, green, white, brown and brown.

The landlord is that the green line in 36 pairs of lines is open and cannot be connected, and the brown line in 78 pairs of lines is transferred to the green column. At the same time, the white-brown line is also transferred to the white-green column. This kind of connection has never happened before, but the most basic functional requirement of our network cable is that all eight lines should be connected. As for the connection to the network, only 12 36 is useful, and everything else is useless. It seems wrong.

Suggestion 1. Change the crystal heads at both ends.

2. Before replacing the crystal head, cut off 50 cm at both ends.

Try to find the opening point of the green line, if not, it will be useless.