H3C S12500R Series, Справочник по аппаратуре

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4-4
Figure 4-4 Crossover cable
Pin assignments
Select an Ethernet twisted pair cable according to the RJ-45 Ethernet port type on your device. An
RJ-45 Ethernet port can be MDI (on routers and PCs) or MDIX (on the device). For the pinouts of
RJ-45 Ethernet ports, see
Table 4-3 and Table 4-4 .
Table 4-3 RJ-45 MDI interface pinouts
Pin
10Base-T/100Base-TX 1000Base-T
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 N/A BIDC+ Bi-directional data cable C+
5 Reserved N/A BIDC- Bi-directional data cable C-
6 Rx- Receive data BIDB- Bi-directional data cable B-
7 Reserved N/A BIDD+ Bi-directional data cable D+
8 Reserved N/A BIDD- Bi-directional data cable D-
Table 4-4 RJ-45 MDI-X interface pinouts
Pin
10Base-T/100Base-TX 1000Base-T
Signal Function Signal Function
1 Rx+ Receive data BIDB+ Bi-directional data cable B+
2 Rx- Receive data BIDB- Bi-directional data cable B-
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