3com 100 TX User Manual

Figure 3-2   Pin Assignments for Straight-Through Cabling

The pin assignments for the 100BASE-TX transceiver interface module are 
the same as the pin assignments for the RJ-45 ports on the hub’s front 
panel. Figure 3-3 shows the RJ-45 connector pin assignments. 

Figure 3-3   RJ-45 Connector Pin Assignments

1

2

3

4

5

6

7

8

Adapter

Hub

1

2

3

4

5

6

7

8

1

12345678

2 3 4 5 6 7 8

TD –

TD +

RD –

RD +

®

3C250-TX