Crystal head line sequence diagram

The general RJ45 network cable (crystal head) is usually direct connection (both ends are 568B), which is used for the connection between different devices, such as computer connection router, etc.

The line sequence is: orange white-1, orange-2, green white-3, blue-4, blue-white-5, green-6, brown-white-7, brown-8;

The second is the cross line (i.e. one end 568a, the other end 568B), which is used for the connection between the same equipment, such as the computer connected to the computer, and the hub connected to the hub.

The sequence is: green white-1, Green-2, orange white-3, blue-4, blue-5, orange-6, brown-white-7, brown-8.

The details are shown in the figure below.

  

1、 PC connected to hub (computer connected to Internet equipment)

A end: (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 to PC or hub to hub

A end: (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.

What is the effect of wrong connection of crystal head wire sequence

If the crystal head is connected wrong, it will be related naturally. If the incoming line end and the outgoing line end are wrongly connected, it is equal to not connecting. If only the incoming or outgoing terminals are connected in the same position in sequence, it will not affect the use.

The network cable commonly used at home is called “twisted pair”, which is composed of 8 wires with different colors. Generally, only 1, 2, 3, and 6 cores are used to transmit data, that is, 1 and 2 are used to transmit and 3 and 6 are used to receive.

By color:

Orange white and orange are used for transmission;

Green white and green are used for receiving;

The other colors are two-way lines. If the wrong connection of other colors, it can be used normally, if the above four wrong connection, it can not be used normally.

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