9-63
Figure9-5 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). Table9-4 and Table9-5
show their pinouts.
Table9-4 RJ-45 MDI port pinouts
Pin
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-
Table9-5 RJ-45 MDIX port pinouts
Pin
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-
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