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1000base-t pin assignments – SMC Networks SMC-EZ109DT User Manual

Page 25

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C

ABLES

13

1000BASE-T Pin Assignments

The table below shows the 1000BASE-T MDI and MDI-X port
pinouts. 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.

Use 100-ohm Category 5 or 5e unshielded twisted-pair (UTP) or
shielded twisted-pair (STP) cable for 1000BASE-T connections.
Also be sure that the length of any twisted-pair connection does not

exceed 100 meters (328 feet).

Pin

MDI Signal Name

MDI-X Signal Name

1

2

3

4

5

6

7

8

Transmit Data plus (TD1+)

Receive Data minus (RD1-)

Transmit Data plus (TD2+)

Transmit Data plus (TD3+)

Receive Data minus (RD3-)

Receive Data minus (RD2-)

Transmit Data plus (TD4+)

Receive Data minus (RD4-)

Transmit Data plus (TD2+)

Receive Data minus (RD2-)

Transmit Data plus (TD1+)

Transmit Data plus (TD4+)

Receive Data minus (RD4-)

Receive Data minus (RD1-)

Transmit Data plus (TD3+)

Receive Data minus (RD3-)