3com Network Router 6000 Owner's Manual download pdf (Page 27)

Router to LAN Connection 27

The RPU2 provides three 10/100/1000 Mbps Ethernet interfaces, where

two are electrical and one provides both fiber-optic and electrical

connectors.

When both electrical and optical connections are available, you can use

only one at a time. For the available SFP options and the interface

attributes, refer “The RPU2 Module”.

Ethernet cable

1 Electrical Ethernet interface cable

Electrical Ethernet interfaces usually use category 5 twisted-pair cables, as

shown in the following figure.

Figure 16 Ethernet cable

Ethernet cables fit into the following two categories:

■ Straight-through cable, at both ends of which, the wires are crimped

in the RJ-45 connectors in the same sequence. The cable connects

different types of devices, such as a terminal device (PC for example)

or router to a Hub or LAN switch. The network cables shipped with

the router are standard cables.

■ Crossover cable, at both ends of which, the wires are crimped in the

RJ-45 connectors in different sequences. The cable connects the same

type of devices, such as PC to PC or PC to router. You can make

crossover cables by yourself as needed.

In preparing network cables, shielded cables are preferred for

electromagnetic compatibility sake.

2 Fiber-optic Ethernet interface cable

For the 10/100/1000M Ethernet interfaces on the RPU2, select single

mode or multi-mode optical fibers depending on the type of the installed

1000Base-FX SFPs. As the interfaces that these SFP modules provide use

LC-type fiber-optic connectors, you must use fibers with LC-type

connectors for them. All these SFPs are hot swappable.

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3com Network Router 6000 Owner's Manual Page 27