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10base-t/100base-tx pin assignments, 1000base-t pin assignments – SMC Networks SMC9462TX User Manual

Page 47

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C

ABLES

B-3

10BASE-T/100BASE-TX Pin Assignments

With 10BASE-T/100BASE-TX cable, pins 1 and 2 are used for
transmitting data, and pins 3 and 6 for receiving data. The “+” and
“-” signs in the tables below are used to represent the polarity of
the wires that make up each wire pair.

1000BASE-T Pin Assignments

The table below shows the 1000Base-T pinouts for a
straight-through cable connection. These ports require that all four
pairs of wires be connected. Note that for 1000Base-T operation, all
four pairs of wires are used for both transmit and receive.

RJ-45 Pin Assignments

Pin

Assignment*

1

Tx+

2

Tx-

3

Rx+

6

Rx-

Connector A

Connector B

1

<- - - - - - - - - - - - - - - - - ->

1

2

<- - - - - - - - - - - - - - - - - ->

2

3

<------------------------------>

3

6

<------------------------------>

6

4

<- - - - - - - - - - - - - - - - - ->

4

5

<- - - - - - - - - - - - - - - - - ->

5

7

<------------------------------>

7

8

<------------------------------>

8