3Com Cable Modem External Manual de usuario

http://www.3com.com/

HomeConnectTM Cable

Modem External with

USB Getting Started

Guide

Part No. 10038811

Published June 2000

3Com Corporation

3800 Golf Rd.

Rolling Meadows, IL

60008

No part of this documentation may be reproduced in any form or by any means or used to make any

derivative work (such as translation, transformation, or adaptation) without written permission from

3Com Corporation.

3Com Corporation reserves the right to revise this documentation and to make changes in content

from time to time without obligation on the part of 3Com Corporation to provide notification of such

revision or change.

3Com Corporation provides this documentation without warranty of any kind, either express or

implied, including, but not limited to, implied warranties of merchantability, and fitness for a particular

purpose. 3Com may make improvements or changes in the product(s) and/or the program(s) described

in this documentation at any time.

If there is any software on removable media described in this documentation, it is furnished under a

license agreement included with the product as a separate document, in the hard copy documentation,

or on the removable media in a directory file named LICENSE.TXT or !LICENSE.TXT. If you are unable to

locate a copy, please contact 3Com and a copy will be provided to you.

UNITED STATES GOVERNMENT LEGEND

If you are a United States government agency, then this documentation and the software described

herein are provided to you subject to the following:

All technical data and computer software are commercial in nature and developed solely at private

expense. Software is delivered as “Commercial Computer Software” as defined in DFARS

252.227-7014 (June 1995) or as a “commercial item” as defined in FAR 2.101(a) and as such is

provided with only such rights as are provided in 3Com’s standard commercial license for the Software.

Technical data is provided with limited rights only as provided in DFAR 252.227-7015 (Nov. 1995) or

FAR 52.227-14 (June 1987), whichever is applicable. You agree not to remove or deface any portion of

any legend provided on any licensed program or documentation contained in, or delivered to you in

conjunction with, this User Guide.

3Com and the 3Com logo are registered trademarks, and HomeConnect and Connections are

trademarks of 3Com Corporation.

Microsoft, Windows, and Windows NT are registered trademarks of Microsoft Corporation in the US

and/or other countries.

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

All specifications are subject to change without notice.

CONTENTS

1BEFORE YOU BEGIN

Introduction 1

Cable Modem Features 1

Contacting Your Local Cable Service Provider 2

Preparing Your Workspace 3

You Will Need These Items 4

Supplied 4

Also Needed 4

2USB INSTALLATION

Deciding Which Installation Process to Use 5

Using USB with the Windows 98 Operating System 5

Using the Cable Connections™ CD 12

Uninstalling the Cable Modem (Windows 98 Operating

System Only) 12

Using USB with the Windows 2000 Operating System 13

Uninstalling the Cable Modem (Windows 2000 Operating

System Only) 17

Troubleshooting the USB Installation 18

3ETHERNET INSTALLATION

Deciding Which Installation Process to Use 25

Setting Up the Computer to Use an Ethernet Connection 25

Configuring the TCP/IP Protocol 25

Connecting the Cable Modem 31

Using the Cable Connections CD 32

Troubleshooting the Ethernet Installation 32

4CABLE MODEM OPERATION

Interpreting The Cable Modem’s LEDs 39

LEDs on the Front of the Modem 39

LED on the Back of the Modem 40

Connectors and Switches on the Back of the Cable Modem 41

5VIEWING THE CABLE MODEM’SCONFIGURATION

6SUPPORT RESOURCES

Support Resources 47

World Wide Web 47

90-Day Free Installation Support 47

Technical Support Hotline 47

If You Are Still Having Problems 47

If You Need to Return the Modem to Us 48

7REGULATORY INFORMATION AND LIMITED WARRANTY

Manufacturers Declaration of Conformity 49

FCC Declaration of Conformity 49

FCC Class B Statement 49

FCC Notice: Radio and Television Interference 50

UL/c UL Listing: 51

Canadian Notice: 51

INTERNATIONAL DECLARATION OF CONFORMITY 52

Electromagnetic Compatibility 52

Safety (Low Voltage Directive) 52

Special Notes: 53

Japan 53

Performance Specifications 53

Export Notices 53

License Agreement 53

3Com Corporation Limited Warranty 54

Hardware 54

Software 54

Year 2000 Warranty 55

Obtaining Warranty Service 56

WARRANTIES EXCLUSIVE 57

LIMITATION OF LIABILITY 57

Disclaimer 58

Governing Law 58

1BEFORE YOU BEGIN

Introduction

You have just purchased a modem featuring a pioneering

new technology, making Internet access possible at speeds

previously only imagined. This external cable modem is one

part of a comprehensive communications system that

utilizes the cable television network to deliver high-speed

data to your computer. Data is requested and sent over the

cable television network at burst rates of up to 38

megabits per second (Mbps)*. This chapter explains how to

prepare your computer system for cable modem

installation.

* Actual speeds will vary depending on computer

hardware, applications, service offered by your cable

service provider, and network traffic.

Cable Modem Features

■Cable line bandwidth allows user data rates of up to 38

megabits per second (Mbps)*, faster than 56K analog

modems, ISDN, or ADSL.

■Two-way design means that the cable modem both

sends and receives data over the cable line.

■Plug-and-play USB operation ensures easy setup and

installation.

■DOCSIS-compliance ensures interoperability with cable

suppliers.

■3Com’s extensive technical support organization

provides you with the quick answers you need to get up

and running.

* NOTE: Please note that the following factors affect the

speeds you may experience: (1) your computer equipment

and configuration, including the speed of your processor,

the amount of RAM on your system, and your available

2CHAPTER 1: BEFORE YOU BEGIN

hard disk space; (2) applications running simultaneously

with the modem which use varying amounts of your

computer’s resources; (3) the capacity of the Internet

service you order from your provider; (4) the level of

network traffic, which varies depending on when and

where you go online.

Contacting Your Local Cable Service Provider

In order to use your cable modem, you need to set up an

Internet access account with your local cable service

provider.

Before contacting your provider to set up an account, have

the following information handy:

■The modem’s serial number. The serial number appears

on the white bar code label on the back of the modem

and consists of 10 characters preceded by the text

“SN=”. In the following example label image, the serial

number is 6LZ1377410.

■Media Access Control (MAC) address. The MAC address

appears on the white bar code label on the back of the

modem and consists of 12 characters preceded by the

text “EA =”. In the following example label image, the

MAC address is 00104B377410. Write both of these

numbers in the following blanks for future reference.

Serial number: SN= __________________

MAC address: EA = __________________

You should now contact your local cable service provider

and verify that:

■The cable service to your home supports two-way

cable modem access. If your cable service provider

does not provide two-way service, this modem will not

Preparing Your Workspace 3

be able to communicate with your cable service

provider’s Internet access service. You should

immediately consult your cable service provider and

place of purchase to determine the proper 3Com® cable

modem to use. You can also visit the following URL for

additional information:

http://www.3com.com/cablemodem

■You have a cable line near your PC and it has been

prepared for cable modem service. If you do not

have a cable line in your home that supports two-way

cable modem access, or if your current cable connection

is not conveniently located near your computer, your

cable service provider can install one. If you use your

current cable line for cable television access, your cable

service provider can also install an additional line for use

with your cable modem.

■Your cable service provider has set up your cable

Internet access account. Your cable service provider

will set up an Internet access account that will allow you

to send and receive e-mail, access the World Wide Web,

and receive other Internet services. This account must

be set up before you can use your cable modem.

Preparing Your Workspace

■Position your computer so that it is located near the

wall cable outlet.

■Position the cable modem so that it is located near the

computer and the wall cable outlet. There should be

plenty of room to guide the cables away from the

modem without crimping them.

■Do not restrict the airflow around the modem.

■Ensure that the temperature in the room where the

cable modem will be operating is between 0 and 40°C

(32 and 104°F). Relative humidity should be between

5% and 90%, non-condensing.

■Familiarize yourself with all of the materials supplied

with the modem. Please read these installation

instructions thoroughly before installing the modem.

4CHAPTER 1: BEFORE YOU BEGIN

CAUTION: Your cable service provider will provide a cable

connection. Do not attempt any rewiring without first

contacting your cable service provider.

You Will Need These Items

Supplied

■Cable modem

■Cable modem power adapter

■Ethernet cable

■USB cable

■This Getting Started Guide

■The Cable ConnectionsTM CD, which contains:

■The software drivers necessary for installation using

the USB port

■Valuable free software products

See “Using the Cable Connections CD” for more

information.

Also Needed

■To use the cable modem’s USB port:

■A PC running Windows 98 or Windows 2000

operating system. Currently, USB does not support

the Macintosh operating system.

■An active USB port on your computer.

■To use the cable modem’s Ethernet port:

■A PC running Windows 95 (or later), or a Macintosh

computer running System 7.5 (or later).

■An active Ethernet port on your computer.

■TCP/IP protocol installed. See the following chapter

for more information on installing the TCP/IP

protocol.

■Windows 95/98/2000 CD or diskettes.

■An active two-way cable line.

■An adjustable wrench for securing the cable line to the

modem.

2USB INSTALLATION

Deciding Which Installation Process to Use

The 3Com®HomeConnect™cable modem allows you to

connect to the Internet using either the USB port or the

Ethernet port. Be sure to follow the instructions provided

for the port that you want to use.

Using the USB port to connect to the Internet allows you to

install the cable modem more quickly and easily than

connecting to the Internet using the Ethernet port, because

you do not need to install a network interface card (NIC).

USB, however, only allows you to connect one computer to

the cable modem.

Using the Ethernet port allows you to use a hub to connect

multiple computers to the cable modem. To do this, you

may need to obtain additional IP addresses from your cable

service provider.

CAUTION: You cannot use the USB and Ethernet

connections simultaneously. Therefore, you should not

have the USB cable and the Ethernet cable plugged into

the cable modem at the same time. Having the USB and

Ethernet cables plugged into the cable modem at the same

time might prevent you from accessing the Internet.

See Chapter 3 “Ethernet Installation” to set up the

Ethernet connection.

Using USB with the Windows 98 Operating System

To use the USB port with Windows 98:

1Power on the computer.

2Use the illustration on page 23 as a guide to make the

following connections:

aConnect the cable line to the cable modem’s CATV

cable connector. Be careful not to bend the wire in the

6CHAPTER 2: USB INSTALLATION

center of the cable line when you connect it to the cable

modem. After hand-tightening the CATV cable

connector, use the adjustable wrench to firmly tighten it.

Be careful not to over-tighten the connector or you may

damage either the connector or the cable modem. If

you plan to have the cable line connected to a television

as well as the cable modem, you will need a cable line

splitter (not included).

bConnect the USB cable line to the cable modem’s USB

port and to the USB port on the computer.

cPlug the cable modem’s power adapter into a wall outlet

or surge protector and into the cable modem’s power

jack.

Windows detects the cable modem. The Found New

Hardware screen appears.

3When the Add New Hardware Wizard screen appears,

insert the Cable Connections CD into the computer’s

CD-ROM drive.

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