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Figure 41 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 51 RJ-45 MDI interface pinouts
Pin
1
2
3
4
5
6
7
8
Table 51
and
10Base-T/100Base-TX
Signal
Function
Tx+
Send data
Tx-
Send data
Rx+
Receive data
Reserved
N/A
Reserved
N/A
Rx-
Receive data
Reserved
N/A
Reserved
N/A
Table
52.
1000Base-T
Signal
BIDA+
BIDA-
BIDB+
BIDC+
BIDC-
BIDB-
BIDD+
BIDD-
76
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-
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Troubleshooting
