Ethernet Cross Over Cable Pinouts

There are two basic cable pin outs. A straight through cable, which is used to connect to a hub or switch, and a cross over cable used to operate in a peer-to-peer fashion without a hub/switch.

Generally all fixed wiring should be run as straight through. Some ethernet interfaces can cross and un-cross a cable automatically as needed, a handy feature. The cross over cable layout is suitable for 1000Base-T operation, all 4 pairs are crossed.

 

Ethenet RJ-45 Male Connector

Ethernet Cross Over Cable Pinout

Name

Color on NIC1

NIC1

NIC2

Name
 

TX+

White/Orange

1

3

RX+
 

TX-

Orange

2

6

RX-
 

RX+

White/Green

3

1

TX+
 

-

Blue

4

7

-
 

-

White/Blue

5

8

-
 

RX-

Green

6

2

TX-
 

-

White/Brown

7

4

-
 

-

Brown

8

5

-


For a full description of what an Ethernet cross over cable is and why they are used, read What is an Ethernet crossover cable?

Related Articles on Ethernet Technology

This data was contributed by the team at The Hardware Book.

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