H3C S7500E Series

151
Figure 63 Crossover cable
Crossover cable
white/orange
orange
white/green
green
white/orange
orange
white/green
blue
white/blue
green
white/brown
brown
1
2
3
4
5
6
7
8
blue
white/blue
white/brown
brown
1
2
3
4
5
6
7
8
Pin assignments
Select an Ethernet twisted pair cable according to the RJ-45 Ethernet interface type on your device. An
RJ-45 Ethernet interface can be MDI (for routers and PCs) or MDIX (for switches). For the pinouts of RJ-45
Ethernet interfaces, see Table 79 and Table 80.
Table 79 RJ-45 MDI interface pinouts
1
0
Base-T/100Base-TX 1000Base-T
Pin
Signal Function Signal Function
1 Tx+ Send data BIDA+
Bi-directional data
cable A+
2 Tx- Send data BIDA-
Bi-directional data
cable A-
3 Rx+ Receive data BIDB+
Bi-directional data
cable B+
4 Reserved — BIDC+
Bi-directional data
cable C+
5 Reserved — BIDC-
Bi-directional data
cable C
6 Rx- Receive data BIDB-
Bi-directional data
cable B-
7 Reserved — BIDD+
Bi-directional data
cable D+
8 Reserved — BIDD-
Bi-directional data
cable D-