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Installation Manual
H3C SecPath F1000-S Firewall
Chapter 8 Multifunctional Interface Modules
8-11
Figure 8-15
Ethernet cable
II. Making an Ethernet cable
To make an Ethernet cable with RJ-45 connectors using a category-5 twisted-pair cable,
refer to Figure 8-16. A category-5 twisted-pair cable is composed of eight wires that are
identified and grouped by colors of the outer insulator. Usually a solid color wire and a
white/solid color wire are organized in pairs. But sometimes, wires are also paired by
color coded points.
Pair 1
Blue
White/blue
Pair 1
Orange
White/orange
Pair 1
Green
White/green
Pair 1
Brown
White/brown
e
Figure 8-16
Category-5 twisted-pair cabl
Ethernet cables are divided into two categories: straight-through and crossover.
z
Straight-through cable: The sequences of the twisted pairs crimped in the RJ-45
connectors at both ends are the same. The cable connects a terminal device (PC
or router) to a Hub or LAN switch.
z
Crossover cable: The sequences of the twisted pairs crimped in the RJ-45
connectors at both ends are different. The cable connects a terminal device (PC or
router) to another terminal device. You can make crossover cables by yourself.
For the Ethernet cable pinout, see
Low-End and Mid-Range Series Routers Cable
Manual
.
8.5.6 Connecting the Interface Cable
Step 1: Plug one end of the cable to the GE port on the 1GBE/2GBE module on the
firewall and another end to the peer device. (For a PC or Router, use a crossover cable;
for a HUB or LAN switch, use a straight-through cable.)