H3C S12500R Series Hardware Reference Manual page 62

Based on pinouts
Ethernet twisted pair cables can be classified into straight through and crossover cables based on
their pinouts.
•
Straight-through—The pinouts at both ends comply with standard 568B, as shown in
4-5.
•
Crossover—The pinouts at one end comply with standard 568B, and those at the other end
comply with standard 568A, as shown in
Figure 4-5 Straight-through cable
Straight-through cable
Figure 4-6 Crossover cable
Crossover cable
Figure 4-6.
1 white/orange
orange
2
white/green
3
4 blue
5 white/blue
6 green
7 white/brown
8
brown
white/orange
1
orange
2
white/green
3
4 blue
5 white/blue
green
6
7 white/brown
8
brown
1 white/orange
2 orange
white/green
3
4 blue
5 white/blue
green
6
white/brown
7
8
brown
1 white/green
green
2
3
white/orange
4 blue
5 white/blue
6 orange
7
white/brown
8
brown
4-6
Figure