Port and Cable Assignments
B-1
Appendix B:
Port and Cable Assignments
RJ-45 Port
Figure B-1 RJ-45 Connector (on the Hub Side)
Pin
MDI-X Assignment
(Station Port 1 ~ 8)
MDI Assignment
(Cascade Port 8)
1
Input Receive Data +
Output Transmit Data +
2
Input Receive Data -
Output Transmit Data -
3
Output Transmit Data +
Input Receive Data +
6
Output Transmit Data -
Input Receive Data -
4,5,7,8
Not Used
Not Used
Table B-1 RJ-45 Pin Assignments
Schematics for both straight and crossover twisted-pair cable are shown below.
Straight-Through
Crossover
(Hub) (Adapter)
(Hub) (Hub)
1 IRD+
1 OTD+
1 IRD+
1 IRD+
2 IRD-
2 OTD-
2 IRD-
2 IRD-
3 OTD+
3 IRD+
3 OTD+
3 OTD+
6 OTD-
6 IRD-
6 OTD-
6 OTD-
