Pin Assignments - H3C S7500E Series Installation Manual

Figure 63 Crossover cable
Crossover cable

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 RJ-45 MDI interface pinouts
Pin
1
2
3
4
5
6
7
8
Table 79 and Table
10Base-T/100Base-TX
Signal Function
Tx+ Send data
Tx- Send data
Rx+ Receive data
Reserved —
Reserved —
Rx- Receive data
Reserved —
Reserved —
1 white/orange
orange
2
white/green
3
4 blue
5
white/blue
6 green
white/brown
7
8
brown
1 white/green
green
2
3
white/orange
4 blue
5 white/blue
orange
6
7
white/brown
8
brown
80.
1000Base-T
Signal
BIDA+
BIDA-
BIDB+
BIDC+
BIDC-
BIDB-
BIDD+
BIDD-
151
Function
Bi-directional data
cable A+
Bi-directional data
cable A-
Bi-directional data
cable B+
Bi-directional data
cable C+
Bi-directional data
cable C
Bi-directional data
cable B-
Bi-directional data
cable D+
Bi-directional data
cable D-