H3C Technologies H3C S12500-X Series Switches - Manual (Page 127)

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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 Figure 68 .
• Crossover—The pinouts at one end comply with standard 568B, and those at the other end comply
with standard 568A, as shown in
Figure 69 .
Figure 68 Straight-through cable
Figure 69 Crossover cable