SoFunction
Updated on 2025-04-13

Which 4 of the 8 wires in a network cable transmit data, and which four are anti-interference

Network cable practice part:
1. PC connection HUB

End A: (Standard 568B): white orange, orange, white green, blue, white blue, green, white brown, brown.
B-end: (Standard 568B): white orange, orange, white green, blue, white blue, green, white brown, brown.

2. PC connected to PC

End A: (568A): white green, green, white orange, blue, white blue, orange, white brown, brown;
B-end: (Standard 568B): white orange, orange, white green, blue, white blue, green, white brown, brown.

3. HUB connects to HUB

End A: (568A): white green, green, white orange, blue, white blue, orange, white brown, brown;
B-end: (568B): white orange, orange, white green, blue, white blue, green, white brown, brown.
The twisted pair of Gigabit Class 5 or Super Class 5 (including Class 6 wires) is the same as the 100-megabit network cable, and is also divided into direct and cross.
The direct network cable is no different from what we usually use, and they are one by one.
However, the traditional 100M network only uses 4 cables for transmission, while the 8 cables for transmission, so the production of 100M network cables is different from that of 100M networks. The production method is as follows:
1 vs 3, 2 vs 6, 3 vs 1, 4 vs 7, 5 vs 8, 6 vs 2, 7 vs 4, 8 vs 5. For example:
One end is: white orange, orange, white green, blue, white blue, green, white brown, brown;

The other end: white green, green, white orange, white brown, brown, orange, blue, white blue;

T568B: Orange white, orange, green white, blue, blue white, green, brown white, brown
T568A: Green and white, green, orange and white, blue, blue and white, orange, brown and white, brown
Direct connection: both ends are made into T568B or T568A. Used to connect to different devices (such as network card to switch).
Crossing line: One end is made into T568B and the other end is made into T568A. Used to connect to the same device (such as network card to network card).
There are only four shrapnels in a 10M network card, and the other four of the 8 wires do not work, so the requirements are low. Just be the same order on both sides, but it is best to do it according to the specifications; there are 8 shrapnels in a 100M network card, four for data transmission, and the other four for anti-crostalk. Strictly doing wires in accordance with the specifications can reduce network failures.

The explanation about the title part is also from COPY. Because I don’t know which one transmits data and which one is blocked. .
If what is said is wrong, just throw the cabbage away. After throwing it, just tell me what it is.

Generally, the LAN is 1236, and the others are useless. 1-3 is a group, 2-6 is a group.