HP NC380T manual RJ-45 pinouts and crossover function

•CAT5 UTP or better twisted-pair

•22-26 AWG, 100Ω @ 1 MHz

•EIA/TIA 568a or EIA/TIA 568b

NOTE: For Gigabit over copper installations, CAT5 UTP or better 1000Base-T cable must comply with the IEEE 802.3ab 1000Base-T standard. For new installations, CAT5e (enhanced CAT5) or better cable is recommended. Maximum distances for Gigabit over copper cable are 100 meters (328 feet).

RJ-45 pinouts and crossover function

The Ethernet standard also specifies that each segment implement a crossover function to connect the transmitter of one device to the receiver of a device at the other end, and vice-versa. The crossover function may be implemented internally at the hub or switch or externally through the twisted-pair media.

10/100 pinouts using internal, straight-through crossover

If the crossover function is implemented internally, the port is labeled MDI-X (Medium Dependent Interface- Crossover). When an MDI-X port is connected to an MDI port, the twisted pair media should be wired straight-through using the physical pinouts indicated.

Pin

1

2

3

4

5

6

7

8

Function	Color match
TD+	Orange
TD-	Orange/White
RD+	Green
	Blue/White
	Blue
RD-	Green/White
	Brown
	Brown/White

Function

TD+

TD-

RD+

RD-

Pin

1

2

3

4

5

6

7

8

Specifications 12