Ethernet Cable
Types of Ethernet Cables
An Ethernet cable connects a maintenance terminal to the console port on the device for local or remote maintenance.
Ethernet cables are classified into straight-through cables and crossover cables.
- Straight-through cable: The twisted pairs in the RJ45 connectors at both ends are crimped in the same sequence. A straight-through cable connects two devices of different types, for example, a PC and a switch.
- Crossover cable: The twisted pairs in the RJ45 connectors at two ends are crimped in different sequences. A crossover cable connects two devices or interfaces of the same type, for example, two PCs.
Crossover and straight cables only differ in wire sequences, and function the same when transmitting data.
Huawei switches support both straight-through and crossover cables and their ports are adaptive to the cable types.
Use shielded Ethernet cables when switches complying with EN 50121-4 are used in environments that meet EN 50121-4 requirements.
Appearance and Structure
The straight-through cable and the crossover cable have the same appearance and use the RJ45 connector.
Figure 1 shows the appearance of an Ethernet cable.
Figure 2 shows the structure of an Ethernet cable.
Pin Assignments
Table 1 shows the pin assignments of a straight-through cable.
X1 Pin |
Wire Color |
X2 Pin |
|---|---|---|
1 |
White and orange |
1 |
2 |
Orange |
2 |
3 |
White and green |
3 |
4 |
Blue |
4 |
5 |
White and blue |
5 |
6 |
Green |
6 |
7 |
White and brown |
7 |
8 |
Brown |
8 |
Table 2 shows the pin assignments of a crossover cable.
X1 Pin |
Wire Color |
X2 Pin |
|---|---|---|
1 |
White and orange |
3 |
2 |
Orange |
6 |
3 |
White and green |
1 |
4 |
Blue |
4 |
5 |
White and blue |
5 |
6 |
Green |
2 |
7 |
White and brown |
7 |
8 |
Brown |
8 |
To achieve the best electrical transmission performance, ensure that the wires connected to pins 1 and 2 and to pins 3 and 6 are twisted pairs.