Cable
Modem External with
USB Getting Started
Guide
http://www.3com.com/
Part No. 10039995
Published Sept. 2000
3Com Corporation
3800 Golf Rd.
Rolling Meadows, IL
60008
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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 5 2. 2 27- 14 (J u ne 19 8 7), wh i ch e ve r is ap pl ic a bl e . Yo u ag r e e no t to r e mo ve or de f ac e an y po r ti o n o f
any legend provided on any licensed program or documentation contained in, or delivered to you in
conjunction with, this User Guide.
trademarks of 3Com Corporation.
Microsoft, Windows, and Windows NT are registered trademarks of Microsoft Corporation in the US
and/or other countries. Macintosh is a registered trademark of Apple Computer, Inc.
All other company and product names may be trademarks of their respective companies.
All specifications are subject to change without notice.
CONTENTS
1 BEFORE YOU BEGIN
Introduction1
Cable Modem Features1
Contacting Your Local Cable Service Provider2
Preparing Your Workspace3
You Will Need These Items4
Supplied4
Also Needed4
2 USB INSTALLATION
Deciding Which Installation Process to Use5
Using USB with the Windows 98 Operating System5
Using the Cable Connections
Uninstalling the Cable Modem (Windows 98 Operating
System Only)12
Using USB with the Windows 2000 Operating System13
Using the Cable Connections CD17
Uninstalling the Cable Modem (Windows 2000 Operating
System Only)17
Using USB with the Windows Me Operating System18
Uninstalling the Cable Modem (Windows Me Operating
System Only)22
Using the Cable Connections
Troubleshooting the USB Installation23
USB Connection Illustration27
™
CD12
CD23
3 ETHERNET INSTALLATION
Deciding Which Installation Process to Use29
Setting Up the Computer to Use an Ethernet Connection29
Configuring the TCP/IP Protocol30
Connecting the Cable Modem36
Using the Cable Connections
CD37
Troubleshooting the Ethernet Installation38
Ethernet Connection Illustration42
4 CABLE MODEM OPERATION
Interpreting The Cable Modem’s LEDs43
LEDs on the Front of the Modem43
LED on the Back of the Modem44
Connectors and Switches on the Back of the Cable Modem45
5 THE 3COM CABLE MODEM CONNECTION CENTER
Accessing the Home Page47
Username and Password48
Registration Indicators48
Overview of the Connection Center’s Pages48
Cable Company48
User Equipment48
Cable Modem49
Diagnostic52
Change Passwo rd52
6 SUPPORT RESOURCES
Support Resources53
World Wide Web53
90-Day Free Installation Support53
Technical Support Hotline53
If You Are Still Having Problems53
If You Need to Return the Modem to Us54
7 REGULATORY INFORMATIONAND LIMITED WARRANTY
Manufacturer s Declaration of Confor mity55
FCC Declaration of Conformity55
FCC Class B Statement55
FCC Notice: Radio and Television Interference56
C-UL/UL Listing:57
Canadian Notice:57
INTERNATIONAL DECLARATION OF CONFORMITY58
Hardware60
Software60
Year 2000 Warranty61
Obtaining Warranty Service62
WARRANTIES EXCLUSIVE63
LIMITATION OF LIABILITY63
Disclaimer64
Governing Law64
1
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 com prehensive 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
prepar e 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.
BEFORE YOU BEGIN
Cable Modem Features
■ Cable line band wi dth a ll ows u ser d ata rat es of up to 3 8
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 informa tion ha ndy:
■ 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 Contr ol (MAC) ad dress. The MAC addr ess
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 Works pace3
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 Inte rnet access account that wi ll allow you
to send and recei ve e-mail, acc ess the Wo rld 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 i nstallation
instructions thoroughly before installing the modem.
4CHAPTER 1: BEFORE YOU BEGIN
CAUTION: Y our cable service provider will provide a cable
connection. Do not attem pt 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 Connections
■The software driver s necessary for instal la ti on using
the USB port
■Valuable free software products
See “Using the Cable Connections CD” for more
information.
TM
CD, which contains:
Also Needed
■ To use the cable modem’s USB port:
■ To use the cable modem’s Ethernet port:
■ Windows 95/98/2000/Me CD or diskettes.
■ An active two-way cable line.
■ An adjustable wrench for securing the cable line to the
■A PC running Windows
®
98, Windows 2000, or
Windows Me operating system. The USB setup does
not support the Macintosh
■An active USB port on your computer.
■A PC running Windows 95 (or later), or a Macintosh
®
operating system.
computer running System 7.6 (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.
modem.
USB INSTALLATION
2
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 Install ati on” to set up the
Ethernet connection.
Using USB with the Windows 98 Operating Syst em
To use the USB port with Windows 98:
1 Power on the computer.
2 Use the illustration on page 27 as a guide to make the
following connections:
a Connect 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 li ne when you co nnect it to th e cable
modem. After hand-tightening the CATV cable
connector, use the adjustable wrench to fir mly 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).
b Connect the USB cable line to the cable modem’s USB
port and to the USB port on the computer.
c Plug 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.
3 When the Add New Har dware Wizard screen appears,
insert the Cable Connections CD into the computer’s
CD-ROM drive.
Using USB with the Windows 98 Operating S ys te m7
4 Click Next.
5 Select Search for the best driver for your device.
(Recommended) and click Next.
8CHAPTER 2: USB INSTALLATION
6 Check the CD-ROM drive check box and click Next to
search for the necessary driver files.
7 If Windows finds an updated driver, select The updated
driver (Recommended) 3Com HomeConnect Cable Modem
External with USB and click Next.
Using USB with the Windows 98 Operating S ys te m9
8 Click Next. The computer automatically copies the
necessary driver files from the CD.
The computer finishes copying the driver files and prompts
you to insert the Windows 98 CD into the CD-ROM drive.
9 Insert the Windows 98 CD and click OK. If the Copying
Files dialog box appears, make sure that you have inserted
the correct CD and that you have pointed it to the correct
path. In the foll owing example, t he path is E:\win98 , wher e
E represents the CD-ROM driv e. If necessary, replace the E
with the letter of your CD-ROM drive. After you point the
Add New Hardware Wizard to the correct path, click OK.
10CHAPTER 2: USB INSTALLATION
The computer automatically copies the necessary system
files.
10 Click Finish after the computer has copied the necessary
files.
Using USB with the Windows 98 Operating S ys te m11
The System Settings Change dialog box opens.
11 Click Yes to restart the computer.
12 Verify that the cable modem is operating properly. When
the modem is operating properly, the cable modem Link
Status and Power LEDs are lighted a solid green.
If you are powering up the cable modem for the first time,
allow 15 minutes for this process to finish. See “Cable
12CHAPTER 2: USB INSTALLATION
Modem Operation” for a more in-depth description of the
front panel LED indicators.
Using the Cable Connections™ CD
The included Cable Connections CD contains the software
drivers necessary for installation using the USB port and
valuable free software products.
After you have completed the entire USB installation
process for the cable modem, you can install the Cable
Connections CD. Installing the Cab le Connections CD gives
you access to the free software products.
To install the Cable Connections CD, follow the i nstruct ions
on the CD sleeve.
Uninstalling the Cable Modem (Windows 98 Operating
System Only)
To uninstall the cable modem:
1 Disconnect the USB cable from the computer and the cable
modem.
2 Close all open applications.
3 Click Windows Start and select Settings.
4 Click Control Panel.
5 Double-click Add/Remove Programs .
Using USB with the Windows 2000 Operating System13
6 Select 3Com HomeConnect Cable Modem External with
USB. Make sure you have selected the software you want
to delete. If you accidentally select the wrong software and
click Add/Remove, Windows deletes the software and you
will have to re-install it.
7 Click Add/Remove. The system removes the 3Com
HomeConnect Cable Modem software.
8 The system prompts you to restart the computer. Click Yes.
9 Click Windows Start, then click Shut Down.
10 Select Restart the Computer and click Yes to restart the
computer.
Using USB with the Windows 2000 Operating System
To use the USB port with Windows 2000:
1 Power on the computer.
2 Use the illustration on page 27 as a guide to make the
following connections:
a Connect the cable line to the cable modem’s CATV cabl e
connector. Be careful not to bend the wire in the 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 fir mly 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).
b Connect the USB cable line to the cable modem’s USB
port and to the computer’s USB port.
c Plug the cable modem’s power adapter into a wall outlet
or surge protector and into the cable modem’s power
jack. The Found New Hardware screen appears.
14CHAPTER 2: USB INSTALLATION
3 The Found New Hardware Wizard screen appears. Insert
the included Cable Connections CD into the CD-ROM driv e
and Click Next.
4 Select Search for a suitable driver for my device
(recommended) and click Next.
Using USB with the Windows 2000 Operating System15
5 Check the CD-ROMdrives check box and click Next to
search for the necessary driver files.
6 The Found New Hardware Wizard displays the search
results. Click Next to install the driver files for the cable
modem.
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