Installation Manual
H3C AR 18-3XE/18-21X Series Routers
Chapter 2 Installing the
Router
2-7
2.5 Connecting the Router to Ethernet
I. Ethernet cable
A 10/100BASE-TX Ethernet interface is usually connected to an
Ethernet using a category 5 twisted pair cable, as shown in Figure 2-4:
Figure 2-4
Ethernet cable
Ethernet cables fit into two categories: straight-through and
crossover.
z
Straight-through cable, at both ends of which, the wires are
crimped in RJ-45 connectors in the same sequence. The
cable is used for connecting different types of devices, such
as a terminal device (PC for example) or router to a Hub or
LAN switch.
z
Crossover cable, at both ends of which, the wires are
crimped in RJ-45 connectors in different sequence. The
cable is used for connecting the same type of devices, such
as PC to PC or PC to router.
