Reason: The order of the 8 cores in the network cable is not correct. The full light of the network cable lamp only proves that the 8 cores of the network cable have been energized.

Solution: Redo the crystal heads and sort them in the order of the crystal heads at the other end of the network cable. If you can not determine the order of the other end of the network cable crystal head, you can follow the national standard t568b "orange-white, orange-white, green-white, blue, blue-white, green, brown-white, brown-white," sorting.

Tools: cross wire; crystal head; cross wire pliers;

Crystal head is made as follows:

1, first, peel off the outer skin of the netting. You can use tools such as the blade of the mesh rope cutter or scissors, as long as you peel off the outer skin;

2, after the outer skin is peeled off, first check the inner 8 cores peeled off whether it is damaged;

3, and then the other end of the crystal head of the order of the 8 cores, or according to the "orange-white, orange-white, green-white, blue-white, blue-white, green, brown white, brown," the order;

4, cut the core so that it is easy to insert the crystal head;

5, insert the crystal head and press it to the end;

6, and then insert the crystal head into the network card of the network cable clamp, and press hard;

7, the production of the mesh crystal head is completed;