Hp NC3122 Fast Ethernet Server Adapter Manual de usuario descargar pdf (Pagina 18)

C-2 Compaq NC3122 Fast Ethernet Server Adapter User Guide

UTP Cable Specifications

To connect to the network, the NC3122 adapter uses the following cable.

10BASE-T

■ Category 3 or better UTP twisted-pair

■ 22-26 AWG, 100Ω at 1MHz

■ EIA/TIA 568a or EIA/TIA 568b

100BASE-T

■ Category 5 or better UTP twisted pair

■ 22-26 AWG, 100Ω at 1MHz

■ EIA/TIA 568a or EIA/TIA 568b

RJ-45 Pinouts and Crossover Function

10BASE-T and 100BASE-TX are keyed systems to differentiate between voice and data

transmissions, in order to keep them separate over twisted-pair cable. The Ethernet standard also

specifies that each cable 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/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 Function Color Match Function Pin

1 TD+ White/Orange TD+ 1

2 TD- Orange/White TD- 2

3 RD+ White/Green RD+ 3

4 Blue/White 4

5 White/Blue 5

6 RD- Green/White RD- 6

7 White/Brown 7

8 Brown/White 8

1 2 ... 13 14 15 16 17 18 19

Sin comentarios

Hp NC3122 Fast Ethernet Server Adapter Manual de usuario Pagina 18