3Com 3C17700 - SuperStack 3 Switch 4900 Getting Started Manual - page 71
Manual is about: Getting Started Guide
of
82
RJ-45 Pin Assignments
71
Table 11 Pin assignments
Pin Number
10/100BASE-T
1000BASE-T
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 D+
5
Not assigned
Bidirectional Data D-
6
Transmit Data -
Bidirectional Data A-
7
Not assigned
Bidirectional Data C+
8
Not assigned
Bidirectional Data C-