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Figure9-5 Crossover cable
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).
show their pinouts.
Table9-4 RJ-45 MDI port pinouts
10BASE-T/100BASE-TX
Pin
Signal
1
Tx+
2
Tx-
3
Rx+
4
Reserved
5
Reserved
6
Rx-
7
Reserved
8
Reserved
Table9-5 RJ-45 MDIX port pinouts
10BASE-T/100BASE-TX
Pin
Signal
1
Rx+
2
Rx-
3
Tx+
4
Reserved
5
Reserved
1
white/orange
2
orange
white/green
3
4
5
white/blue
green
6
7
white/brown
8
brown
1
white/green
green
2
3
white/orange
4
5
white/blue
6
orange
7
white/brown
8
brown
1000BASE-T
Function
Signal
Sends data
BIDA+
Sends data
BIDA-
Receives data
BIDB+
N/A
BIDC+
N/A
BIDC-
Receives data
BIDB-
N/A
BIDD+
N/A
BIDD-
1000BASE-T
Function
Signal
Receives data
BIDB+
Receives data
BIDB-
Sends data
BIDA+
N/A
BIDD+
N/A
BIDD-
9-4
blue
blue
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-
Function
Bi-directional data cable B+
Bi-directional data cable B-
Bi-directional data cable A+
Bi-directional data cable D+
Bi-directional data cable D-
Table9-4
and
Table9-5
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