Compaq Netelligent 1005 User Manual page 9

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The following table and illustrations show the pin wiring for both straight and
crossover twisted-pair cable. (Note that crossover cable is required only if you
cascade hubs using RJ-45 Ports 1-5; that is, the UPLINK port is not used.)
Straight-Through
(Hub) (Adapter)
1 IRD+ 1 OTD+
2 IRD- 2 OTD-
3 OTD+ 3 IRD+
6 OTD- 6 IRD-
Crossover
(Hub)
1 IRD+
2 IRD-
3 OTD+
6 OTD-
(Hub)
1 IRD+
2 IRD-
3 OTD+
6 OTD-