
65
Figure 51 Crossover cable
Select an Ethernet twisted pair cable according to the RJ-45 Ethernet port 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 32 and Table 33.
Table 32 RJ-45
MDI interface pinouts
Pin
10Base-T/100Base-TX
1000Base-T
Si
nal Function
Si
nal
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 33 RJ-45 MDI-X interface pinouts
Pin
10Base-T/100Base-TX
1000Base-T
Si
nal Function
Si
nal
Function
1 Rx+ Receive data BIDB+ Bi-directional data cable B+
2 Rx- Receive data BIDB- Bi-directional data cable B-
3 Tx+ Send data BIDA+ Bi-directional data cable A+
4 Reserved N/A BIDD+ Bi-directional data cable D+
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