3Com 2924-PWR - Manual (Page 223)

Ethernet Port RJ-45 Pin Assignments 223
Table 11 Pin assignments
Pin Number 10/100 1000
Ports configured as MDIX
1 Receive Data + Bidirectional Data B+
2 Receive Data − Bidirectional Data B −
3 Transmit Data + Bidirectional Data A+
4 Not assigned Bidirectional Data A −
5 Not assigned Bidirectional Data D+
6 Transmit Data
−
Bidirectional Data D
−
7 Not assigned Bidirectional Data C+
8 Not assigned Bidirectional Data C
−