59
Figure 61 Crossover cable
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 (for routers and PCs) or MDIX (for switches). Table 33 an
d Table 34
show their pinouts.
Table 33 RJ-45 MDI port pinouts
Pin
10BASE-T/100BASE-TX 1000BASE-T
Signal Function Signal Function
1 Tx+ Sends data BIDA+ Bi-directional data cable A+
2 Tx- Sends data BIDA- Bi-directional data cable A-
3 Rx+ Receives 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- Receives 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 34 RJ-45 MDIX port pinouts
Pin
10BASE-T/100BASE-TX 1000BASE-T
Signal Function Signal Function
1 Rx+ Receives data BIDB+ Bi-directional data cable B+
2 Rx- Receives data BIDB- Bi-directional data cable B-
3 Tx+ Sends data BIDA+ Bi-directional data cable A+
4 Reserved N/A BIDD+ Bi-directional data cable D+
5 Reserved N/A BIDD- Bi-directional data cable D-
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