Utp Cable Specifications; Using Utp Category 5 Cable In Gigabit Over Copper Installations; Rj-45 Pinouts And Crossover Function; 10/100 Straight-Through Pinouts - HP NC7770 User Manual

Specifications

UTP Cable Specifications

To connect to the network, the NC7770 Server Adapter uses the following cable for
1000BASE-T transmission.
Category 5 UTP or better
22-26 AWG, 100 @ 1MHz
EIA/TIA 568a or EIA/TIA 568b

Using UTP Category 5 Cable in Gigabit Over Copper Installations

For Gigabit over copper installations, Category 5 UTP or better 1000BASE-T cable must
comply with the IEEE 802.3ab 1000BASE-T standard. For new installations, Category 5e
(enhanced Category 5) or better cable is recommended.

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 Straight-Through Pinouts

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 in
Table C-2.
Table C-2: 10/100 Pinouts Using Internal, Straight-Through Crossover
Pin
1
2
3
4
5
6
7
8
Figure C-1 shows the straight-through 10/100 connector wiring to be used when the crossover
function is implemented on the hub or switch.
C-2
Function Color Match
TD+ White/Orange
TD- Orange/White
RD+ White/Green
Blue/White
White/Blue
RD- Green/White
White/Brown
Brown/White
Function
TD+
TD-
RD+
RD-
HP NC7770 PCI-X Gigabit Server Adapter User Guide
Pin
1
2
3
4
5
6
7
8