Hub's rj-45 pin assignments – Compaq Netelligent 1005 User Manual
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Netelligent 1005 10Base-T Hub User Guide
Writer: Chris Seiter Project: Netelligent 1005 10Base-T Hub User Guide Comments:
File Name:1005.DOC Last Saved On:6/26/97 11:19 AM
Hub's RJ-45 Pin Assignments
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.)
Pin
MDI-X Assignment
(Port 1~5)
MDI-Assignment
(UPLINK Port)
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
Figure 2 . RJ-45 Pin Configuration
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-