3Com 4500G Getting Started Manual page 81

Table 11 Pin assignments
Pin Number
Ports configured as MDIX
1
2
3
4
5
6
7
8
Ethernet Port RJ-45 Pin Assignments
10/100
Receive Data +
Receive Data −
Transmit Data +
Not assigned
Not assigned
Transmit Data −
Not assigned
Not assigned
1000
Bidirectional Data B+
Bidirectional Data B−
Bidirectional Data A+
Bidirectional Data A−
Bidirectional Data D+
Bidirectional Data D−
Bidirectional Data C+
Bidirectional Data C−
81