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Installation Guide

OfficeConnect

Cable/DSL Gateway

(3C855)

3Com Corporation, Corporate Headquarters, 5400 Bayfront Plaza, Santa Clara, CA 95052-8145

trademarks of 3Com Corporation. The 3Com logo is a trademark of 3Com Corporation.

Microsoft, MS-DOS and Windows are registered trademarks of Micorsoft Corporation.

All other company and product names may be trademarks of their respective companies.

Part number: DIA0085-5AAA01 Published: November 2001

INTRODUCTION

About This Guide:

This Guide takes you through the basic steps necessary to install and configure

your OfficeConnect Cable/DSL Gateway, and establish a connection from your

computers to the Internet. Throughout, the OfficeConnect Cable/DSL

Gateway is simply referred to as the Gateway.

Your Package Contains:

One OfficeConnect Cable/DSL Gateway

One power adapter for use with the Gateway

Four rubber feet

One Ethernet cable, 1m (3.28 ft) long

One CD-ROM containing the Gateway Discovery program and the User Guide

This Installation Guide

One Support and Safety Information Sheet

One Warranty Flyer

System Requirements:

Before starting, you must ensure the following:

You already have a cable or DSL broadband connection to the Internet, with

a suitable modem, and that this connection works properly. The modem

must have an Ethernet port for connection to your Gateway.

You have a computer that has an Ethernet connection available and is

already correctly configured for communication with the Internet. Your

computer must be able to connect to the Internet via the modem, and must

have a Web browser installed.

There are no other DHCP server devices on your local network that are

responsible for allocating IP addresses to your computers and other

network-connected devices.

If one or more of these conditions are not met, refer to the comprehensive

Gateway User Guide provided on the accompanying CD-ROM for further guidance.

ABOUT YOUR GATEWAY

Cable/DSL Gateway - Front

LAN Status

Cable/DSL

Alert

1 Alert LED

Flashing slowly - The Gateway has completed the

Reset to Factory Defaults process, and is waiting for

orange

you to reset the unit. To do this, remove power, wait

Indicates a number of different conditions, as

10 seconds and then re-apply power. The Gateway

described below.

will then enter the start-up sequence and resume

Off - The Gateway is operating normally.

normal operation.

Flashing quickly - Indicates one of the following

On for 2 seconds, and then off - The Gateway has

conditions:

detected and prevented a hacker from attacking your

network from the Internet.

• The Gateway has just been started up and is

running a self-test routine, or

Continuously on - A fault has been detected with

your Gateway during the start-up process. Refer to

• The administrator has invoked the Reset to Factory

the main User Guide.

Defaults command, or

2 Power LED

• The system software is in the process of being

upgraded

green

In each of these cases, wait until the Gateway has

Indicates that the Gateway is powered on.

completed the current operation and the alert LED

is Off.

DIMENSIONS AND STANDARDS

Dimensions and Operating Conditions

Standards

Functional:

ISO 8802/3

EMC:

IEEE 802.3, 802.3u

Safety:

UL 1950, EN 60950

CSA 22.2 #950,

IEC60950

Environmental:

* Refer to Regulatory Notices section in the Support and Safety Information sheet

Cable/DSL Gateway

7 VA, 23.9 BThU/hr

power requirement

0 to 40ºC (32 to 105ºF)

operating

temperature

0 to 90%

(non-condensing)

humidity

Cable/DSL Gateway

535g (1.3 lb)

Cable/DSL Gateway - Rear

3C855

OfficeConnect Cable/DSL Gateway

3 Four LAN Status LEDs

green (100Mbps link) / yellow (10Mbps link)

If the LED is on, the link between the port and the

next piece of network equipment is OK. If the LED is

flashing, the link is OK and data is being transmitted

or received. If the LED is off, nothing is connected, or

the connected device is switched off, or there is a

problem with the connection (refer to the "Problem

Solving" section).

4 Cable/DSL Status LED

yellow

If the LED is on, the link between the Gateway and

the cable or DSL modem is OK. If the LED is flashing,

the link is OK and data is being transmitted or

received. If the LED is off, nothing is connected, the

modem is switched off or there is a problem (refer to

the "Problem Solving" section).

POSITIONING YOUR GATEWAY

Safety Information

WARNING: Please read the 'Important Safety Information' section in the

EN 55022 Class B

Support and Safety Information sheet before you start.

EN 55024

VORSICHT: Bitte lesen Sie den Abschnitt 'Wichtige

FCC Part 15 Class B*

Sicherheitsinformationen' sorgfältig durch, bevor Sie das Gerät einschalten.

ICES-003 Class B

VCCI Class B

AVERTISSEMENT: Veuillez lire attentivement la section "Consignes

CNS 13438 Class A

importantes de sécurité" avant de mettre en route.

EN 60068 (IEC 68)

When positioning your Gateway, ensure:

It is out of direct sunlight and away from sources of heat.

Cabling is away from power lines, fluorescent lighting fixtures, and

sources of electrical noise such as radios, transmitters and broadband

amplifiers.

Water or moisture cannot enter the case of the unit.

Air flow around the unit and through the vents in the side of the case

is not restricted. We recommend you provide a minimum of 25mm

(1in.) clearance.

Using the Rubber Feet

Use the four self-adhesive rubber feet to prevent your Gateway from

moving around on your desk or when stacking with other flat top

OfficeConnect units. Only stick the feet to the marked areas at each

corner of the underside of your Gateway.

Ethernet

Cable/

DSL

5 Power Adapter socket

Only use the power adapter that is supplied with

this Gateway. Do not use any other adapter.

6 Ethernet Cable/DSL port

Use the supplied patch cable to connect the

Gateway to the 10BASE-T port on your cable or DSL

modem. This port will only operate at 10Mbps in

half-duplex mode.

7 Four 10/100 LAN ports

Use suitable cable with RJ-45 connectors. You can

connect your Gateway to a computer, or to any

other piece of equipment that has an Ethernet

connection (for example, a hub or a switch). All

ports will automatically adjust for the correct speed,

duplex mode and cable type, which means that you

can connect devices to your Gateway using either

straight-through or crossover cables.