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