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Cable and Port Assignments B-1

Appendix B:

Port and Cable Assignments

RJ-45 Port

Figure B-1 RJ-45 Connector (on the Hub Side)

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

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-

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 45 46

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HP 100BaseT Guida Utente Pagina 29