Smc-networks SMC7904BRA Manual de usuario descargar pdf (Pagina 120)

THERNET

ABLE

B-3

Pin Assignments

With 100BASE-TX/10BASE-T cable, pins 1 and 2 are used for

transmitting data, and pins 3 and 6 for receiving data.

Straight-Through Wiring

If the port on the attached device has internal crossover wiring (MDI-X),

then use straight-through cable.

Crossover Wiring

If the port on the attached device has straight-through wiring (MDI), use

crossover cable.

RJ-45 Pin Assignments

Pin Number

Assignment

1Tx+

2Tx-

3Rx+

6Rx-

1: The “+” and “-” signs represent the polarity of the wires

that make up each wire pair.

Straight-Through Cable Pin Assignments

End 1 End 2

1 (Tx+) 1 (Tx+)

2 (Tx-) 2 (Tx-)

3 (Rx+) 3 (Rx+)

6 (Rx-) 6 (Rx-)

Crossover Cable Pin Assignments

End 1 End 2

1 (Tx+) 3 (Rx+)

2 (Tx-) 6 (Rx-)

3 (Rx+) 1 (Tx+)

6 (Rx-) 2 (Tx-)

1 2 ... 115 116 117 118 119 120 121 122 123 124 125 ... 128 129

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Smc-networks SMC7904BRA Manual de usuario Pagina 120