SMC Networks SMC8011CM User Manual download pdf (Page 32)

ORT

AND

ABLE

SSIGNMENTS

Straight-Through Cable

If the twisted-pair cable is to join two ports and only one of the ports has

an internal crossover (MDI-X), the cable used must be straight-through.

Crossover Cable

If the twisted-pair cable is to join two ports and either both ports are

labeled with an “X” (MDI-X) or neither port is labeled with an “X”

(MDI), a crossover must be implemented in the wiring.

Straight-Through RJ-45 Pin Assignments

End 1 End 2

1 (RD+) 1 (TD+)

2 (RD-) 2 (TD-)

3 (TD+) 3 (RD+)

6 (TD-) 6 (RD-)

Crossover RJ-45 Pin Assignments

End 1 End 2

1 (TD+) 3 (RD+)

2 (TD-) 6 (RD-)

3 (RD+) 1 (TD+)

6 (RD-) 2 (TD-)

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SMC Networks SMC8011CM User Manual Page 32