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Table 3-3 Pin configuration of the 10/100/1000BASE-T port
RJ45
Physical specifications
pin
number
10BASE-T
1
Receive (+) (A)
2
Receive (-) (a)
3
Send (+) (B)
#1
4
Not used
#1
5
Not used
6
Send (-) (b)
#1
7
Not used
#1
8
Not used
#1: Connect them when a 4-pair 8-core cable is used.
#2: The cable is of twisted pair configuration. For a 4-pair 8-core cable, (A) and (a), (B) and
(b), (C) and (c) and (D) and (d) should be paired. For a 2-pair 4-core cable, (A) and (a) and
(B) and (b) should be paired.
64
100BASE-TX
Receive (+) (A)
Receive (-) (a)
Send (+) (B)
(C)
Not used
(c)
Not used
Send (-) (b)
(D)
Not used
(d)
Not used
1000BASE-T
Send/Receive A (+) (A)
Send/Receive A (-) (a)
Send/Receive B (+) (B)
#1
(C)
Send/Receive C (+) (C)
#1
(c)
Send/Receive C (-) (c)
Send/Receive B (-) (b)
#1
(D)
Send/Receive D (+) (D)
#1
(d)
Send/Receive D (-) (d)
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Troubleshooting
