Port Assignments
B-1
Appendix B: Port Assignments
Figure B.1 RJ-45 Connector (on the Hub Side)
Table B.1 RJ-45 Pin Assignments
Schematics for both straight and crossover twisted-pair cable are shown
below.
RJ-45 Port
Pin
MDI-X Assignment
(Port 1-8)
MDI Assignment
(Cascade Port 8)
1
Receive Data +
Transmit Data +
2
Receive data -
Transmit Data -
3
Transmit Data +
Receive Data +
6
Transmit Data -
Receive data -
4,5,7,8
Not Used
Not Used
Straight-Through
Crossover
1 IRD+
2 IRD-
3 OTD+
6 OTD-
1 OTD+
2 OTD-
3 IRD+
6 IRD-
1 IRD+
2 IRD-
3 OTD+
6 OTD-
1 OTD+
2 OTD-
3 IRD+
6 IRD-
(Hub)
(Adapter)
(Hub)
(Hub)
100hub8.book : 100hub8b.fm Page 1 Monday, April 27, 1998 10:06 AM
