3Com Network Card 2940 2941 User Manual

This manual covers installation and operating instructions for the following 3Com® modems:  
®
3
3
U.S. Robotics Cable Modem CMX CR292-DE56 (model 2940)  
®
U.S. Robotics Cable Modem CMX CR292-DE40 (model 2941)  
3Com, the 3Com logo, U.S. Robotics, the U.S. Robotics logo, EtherLink, and OfficeConnect  
are registered trademarks and Connections is a trademark of 3Com Corporation. Windows is a  
registered trademark of Microsoft Corp. Macintosh is a registered trademark of Apple  
Computer, Inc. Any other trademarks, trade names, or service marks used in this manual are the  
property of their respective owners.  
Copyright © 1999 3Com Corporation  
3800 Golf Road  
Rolling Meadows, IL 60008  
All Rights Reserved  
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Regulatory Information and Limited Warranty  
29  
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INTRODUCTION  
Two-way design means that the CMX  
sends and receives data over the cable  
line (unlike one-way modems, which  
require an analog modem for upstream  
data)  
Congratulations! You have just purchased a  
modem that features a pioneering new  
technology. 3Com, a leader in networking  
and data access, is proud to offer you this  
technology that makes Internet access  
possible at speeds previously only  
imagined!  
Plug and play operation ensures easy  
setup and installation  
DOCSIS-compliant for interoperability  
with cable operators  
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).  
3Com’s extensive user support  
organizations and our 5-year limited  
warranty  
* Please note that the following factors  
affect the speeds you may experience:  
Cable Modem Features  
Your computer equipment and  
configuration, including the speed of  
your processor, the amount of RAM on  
User data rates of up to 3000K,* faster  
than 56K analog modems, ISDN, or  
ADSL  
1
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INTRODUCTION  
your system, and your available hard  
disk space.  
The Internet browsing, e-mail, or other  
programs you run at the same time,  
which use your computer’s resources.  
The capacity of the Internet service you  
order from your provider.  
Changing network traffic levels  
depending when you go online.  
2
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BEFORE YOU BEGIN  
This chapter explains how to prepare your  
computer system for cable modem  
installation.  
MAC address is 00104B377410. Write  
the MAC address in the blank provided  
below.  
Contacting Your Local Cable  
Company  
In order to use your cable modem, you need  
to establish an Internet access account with  
your local cable company. Before  
contacting your cable company to establish  
an account, have the following information  
handy:  
The modem’s model number (located  
on a sticker on the bottom of the  
modem). Your modem’s model number  
will be 2940 or 2941.  
The modem’s Media Access Control  
(MAC) address (located on a bar code  
sticker on the back of the modem). The  
MAC address consists of 12 characters  
preceded by the text EA =. In the  
MAC address: EA = __________________  
Model number (circle one): 2940 or 2941  
following example label image, the  
3
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BEFORE YOU BEGIN  
You should now contact your local cable  
company and verify the following:  
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  
established before you can use your  
cable modem.  
You have cable service to your home  
that supports two-way cable modem  
access. If your cable company does not  
provide two-way service, the  
U.S. Robotics Cable Modem CMX will  
not be able to communicate with your  
cable company’s Internet access service.  
You should immediately consult your  
cable company and place of purchase to  
determine the proper U.S. Robotics  
cable modem that will work with your  
cable company. You can also visit the  
following URL for additional  
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 company can  
install one. If you use your cable line for  
cable television access, your cable  
company can also install an additional  
line for use with your cable modem.  
information:  
Your cable company has set up your  
cable Internet access account. Your  
cable company will establish an Internet  
4
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BEFORE YOU BEGIN  
Relative humidity should be between 5  
and 95%, non-condensing.  
Preparing Your Workspace  
Position your computer so that it is  
Familiarize yourself with all of the  
materials in this box. Please read these  
installation instructions thoroughly  
before installing your cable modem.  
located near your cable outlet.  
The cable modem should be located near  
your computer and the cable outlet.  
There should be plenty of room to guide  
the cables away from the modem without  
crimping the cables.  
CAUTION: Your cable company  
will provide a cable connection. Do not  
attempt any rewiring without first  
contacting your cable company.  
The modem should be located where it  
has ample space to allow constant  
airflow around the unit.  
Do not stack anything on top of the cable  
concerning stacking this modem with  
3Com OfficeConnect products.)  
You Will Need These Items  
Included:  
Cable modem  
Cable modem power supply  
RJ-45 network cable  
Rubber feet and stacking clips kit  
Cable Connections CD-ROM  
The temperature in the room where the  
cable modem will be operating should be  
between 0 and 40°C (32 and 104°F).  
5
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BEFORE YOU BEGIN  
wood screws, use #6 pan heads or  
equivalent.  
Fold-out Quick Installation Guide  
This User’s Guide & Reference  
Not Included:  
A PC running Windows 95 (or later)  
Configuring the TCP/IP  
Protocol on a Windows PC  
or a Macintosh running System 7.5 (or  
later) with TCP/IP protocol installed  
(see the following two sections for more  
information on installing TCP/IP)  
If you have a PC running Windows 95 or  
later, you need to make sure the TCP/IP  
communications protocol is installed on  
your system before you install your cable  
modem. The listing of actual components  
installed on your PC depends on the  
hardware installed in your computer. The  
installation example in this guide assumes a  
3Com EtherLink III 3C509B-TPO NIC  
has been installed and the screen images  
shown below reflect this hardware  
An active two-way cable line  
An active Ethernet port or network  
interface card (NIC) installed in your  
computer  
A 7/16 inch (or adjustable) wrench for  
securing the cable line to the modem  
A screwdriver, pushpins, and screws (for  
optional wall-mounting) The screw  
heads should be at least 0.2” (5mm) in  
diameter for them to be properly  
captured in the slot. If you are using  
configuration. Other networking cards will  
work but the screen images will look  
somewhat different.  
6
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BEFORE YOU BEGIN  
NOTE: If you need to install a  
network interface card to give your  
computer Ethernet capability but have  
not yet done so, perform this operation  
first by consulting your NIC installation  
manual and then return here to  
complete installation of the TCP/IP  
software.  
If an entry similar to this is present, go to  
step 9 on the next page.  
1. Click Start, point to Settings, and then  
click Control Panel.  
2. Double-click the Network icon.  
4. If a similar entry is not present, click  
Add...  
3. A list of installed network components  
appears. Look for an entry that includes  
TCP/IP -> followed by the NIC  
hardware device installed in your  
computer. (The entry for the 3C509B-  
TPO example is shown in the following  
screen image).  
5. Click Protocol, and then click Add...  
6. Click Microsoft in the “Manufacturers:”  
list and then click TCP/IP in the  
“Network Protocols:” list. Click OK.  
7
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BEFORE YOU BEGIN  
your PC to work with your cable  
modem. When you are finished, turn to  
“Hardware and Software Installation”  
Configuring the TCP/IP  
Protocol on a Macintosh PC  
You will need to configure TCP/IP to work  
with your cable modem if you are using a  
Macintosh.  
7. “TCP/IP” will appear in the list of  
installed network components. Click  
OK.  
1. Double-click your System folder.  
2. Double-click Control Panels.  
8. Windows will now ask you if you would  
like to restart your computer. Click No.  
3. Look for the TCP/IP Control Panel  
icon.  
9. Your cable company may provide you  
with additional TCP/IP setup  
instructions. Consult those instructions,  
if provided, to complete configuration of  
8
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BEFORE YOU BEGIN  
If you do not see this icon, you must  
reinstall your Macintosh system  
software and add networking support.  
Consult your Macintosh User Manual  
for more information on how to do this.  
4. Exit out of all open windows.  
5. Your cable company may provide you  
with additional TCP/IP setup  
instructions. Consult those instructions,  
if provided, to complete configuration  
of your Mac to work with your cable  
modem. When you are finished, turn to  
“Hardware and Software Installation”  
(page 11).  
9
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BEFORE YOU BEGIN  
10  
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HARDWARE AND SOFTWARE INSTALLATION  
1. Wall-mount installation (this page)  
3. OfficeConnect stacking installation  
NOTE: Before installing your  
modem, write its serial number in the  
space provided on the first page of this  
manual. (You’ll find the serial number  
above the bar code on the white sticker  
on the back of the modem and on the  
outside of the modem’s box.) If you  
ever call our customer support  
department, a representative will ask  
you for the serial number. This will  
Wall-Mount Installation  
Your cable modem is capable of being wall-  
mounted, if you choose to do so. The  
bottom panel of the cable modem has two  
raised brackets with slots as shown in the  
following illustration.  
help to identify your modem.  
NOTE: Before wall-mounting the  
Before you begin installing the cable  
modem hardware, you need to determine  
how you want to incorporate the modem  
into your work environment. There are  
cable modem, follow the instructions in  
the section “Connecting the Cable  
Modem to Your Computer” (pages 15-  
18). Then return to this point to  
continue the process.  
three installation options:  
11  
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HARDWARE AND SOFTWARE INSTALLATION  
1. Remove the mounting template from the  
Installation Guide.  
2. Place the mounting template against the  
wall at the location chosen for the cable  
modem. The template should be parallel  
to and at least 20 inches (50 cm) from  
the floor. Insert pushpins through the  
template cross hairs into the wall to mark  
the locations for the screws.  
®
3. Secure the mounting screws into the  
wall. Do not drive the screws flush to the  
wall. The screw head should be at least  
¼” (6 mm) away from the wall so it can  
lock into the slots on the modem’s case.  
mounting  
holes  
These slots fit over the heads of wall-  
mounting screws to secure the modem to  
the wall. A mounting template for marking  
the location of the mounting screws is  
included in the foldout Installation Guide  
that accompanies this manual.  
4. Fit the slots in the brackets on the  
modem’s underside over the screw heads  
and let the modem slide down into  
position.  
12  
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HARDWARE AND SOFTWARE INSTALLATION  
Computer” (page 15). Otherwise, turn to  
“Installing the Cable Connections  
CD-ROM” on page 18.  
THE CABLE MODEM  
ALL-MOUNTING  
W
.
erence  
.
UCTIONS FOR  
uctions  
User's Guide  
&
Ref  
INSTR  
emplate  
,
see the  
or basic instr  
all-mounting  
T
uctions  
W
See other side  
f
Desktop Installation  
or complete instr  
®
F
If you plan to place your modem on a flat  
surface, you can use the four self-adhesive  
rubber feet included in your modem’s  
package to prevent your modem from  
sliding around. Stick the feet to the marked  
areas at each corner of the underside of your  
modem. Turn to “Connecting the Cable  
Modem to Your Computer” (page 15).  
20"  
[ 50 cm ]  
OfficeConnect Stacking  
Installation  
If you own 3Com OfficeConnect products,  
you can use the four stacking clips included  
in your modem’s package to neatly and  
If you have not already done so, turn to  
“Connecting the Cable Modem to Your  
13  
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HARDWARE AND SOFTWARE INSTALLATION  
securely stack your cable modem with the  
3. Keeping the front of the units aligned,  
position the top-most OfficeConnect  
device and rest the bottom of the device  
on the clips' spikes, as shown in step 3 of  
the illustration on the next page. Push  
the clips firmly until they click into  
place.  
OfficeConnect unit(s). If possible, your  
cable modem should always be the top unit  
in a stack with OfficeConnect products.  
Small hubs are the only units that should be  
clipped to the top of a cable modem. Follow  
these instructions to clip your modem to an  
OfficeConnect unit.  
1. Place the OfficeConnect device you  
want at the bottom of the stack on a flat  
surface. The supplied blue clips fit in the  
positions on the side of the unit as shown  
in step 1 of the illustration on the next  
page.  
NOTE: To remove a clip, hold the  
units firmly with one hand and hook the  
first finger of your other hand around  
the back of the clip. Be careful not to  
pull so hard that you break the clip.  
4. Repeat these steps to secure the other  
2. Position a clip over one of these holes  
and push it in until it clicks into place, as  
shown in step 2 of the illustration on the  
next page. Repeat this for the other clip  
position on the same side.  
side.  
5. Turn to “Connecting the Cable Modem  
to Your Computer” (page 15).  
14  
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HARDWARE AND SOFTWARE INSTALLATION  
Connecting the Cable Modem  
to Your Computer  
TIP: Before you unplug any cords,  
label them or make a sketch of how  
they are connected. This can be helpful  
when you plug them back in later.  
CAUTION: To avoid risk of  
electric shock, make sure your  
computer and all peripheral devices are  
turned off and unplugged from  
electrical outlets.  
15  
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HARDWARE AND SOFTWARE INSTALLATION  
NOTE: Refer to the diagram on the following page while following these steps.  
1. Turn off your computer and unplug it from the electrical outlet.  
2. Using the following illustration as a guide, make the following connections:  
Connect your cable line to the cable modem’s CATV cable 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 your 7/16 inch or adjustable wrench  
to firmly tighten the connector. Be careful not to over-tighten the connector or you might  
damage the connector or your cable modem.  
Plug the cable modem’s power supply into a wall socket or surge protector and into the  
+
-
cable modem’s power jack (labeled with a graphic that looks like this:  
).  
Plug one end of the RJ-45 network cable into the cable modem’s RJ-45 jack and the other  
end into the existing network interface card installed in your computer.  
The serial port on your cable modem is unused during two-way operation. If the cable  
modem is being used with an analog modem for telephony-return cable modem operation,  
you will receive additional instructions on how to make these connections.  
3. Verify that your cable modem starts up and initializes properly. You can tell that your  
modem is operating properly if the Cable Modem Power and Cable Modem Status LEDs  
16  
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HARDWARE AND SOFTWARE INSTALLATION  
are lighted solid green. If you are powering up your cable modem for the first time, allow 5  
to 15 minutes for this process to complete. Consult the chapter titled “Cable Modem  
Operation” for a more in-depth description of the front panel LED indicators.  
BT  
10  
L
A
SERI  
TV  
CA  
power supply  
(to wall outlet)  
RJ-45 cable  
(to NIC)  
cable line (to cable  
outlet)  
4. Plug the computer’s power cord back into the computer. Turn on the computer. When  
installation is complete, your setup should resemble the following diagram.  
17  
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HARDWARE AND SOFTWARE INSTALLATION  
cable outlet  
RJ-45 cable  
(to NIC)  
13  
2
12  
3
5
11  
10  
4
9
6
8
7
15  
25  
85  
30  
45  
50  
80  
75  
70  
55  
6
5
6
0
MX  
U.S. Robotics  
odem C  
3Com  
Cable  
M
le  
b
Ca  
Link  
Ac  
PC  
le  
b
Ca  
FCN  
m
e
d
vity  
ti  
Mo  
Ac  
vity  
ti  
s
tu  
a
St  
s
tu  
a
St  
r
e
w
Po  
power supply cable  
(to wall outlet)  
Installing the Cable Connections CD-ROM  
Although you do not need to install the included Cable Connections CD-ROM to use your  
Cable Modem CMX, you will want to discover the valuable free software products and Internet  
service provider offers included on the CD-ROM. To install Cable Connections, follow the  
instructions inside the CD’s jacket or on the CD-ROM itself.  
18  
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CABLE MODEM OPERATION  
Once your cable modem is properly installed and power supply is connected to AC power, it  
will automatically scan for the active cable modem channel from your cable company’s server.  
Once the front panel LEDs indicate the modem is connected to the server, all you need to do is  
launch your Internet or e-mail software and you’re ready to work online.  
Here’s a quick overview of the LED lights on the front panel of your modem and what they can  
tell you about the performance of your modem and the condition of your connection.  
MX  
U.S. Robotics  
odem C  
3
Com  
Cable M  
e
l
Cab  
Link  
PC  
e
l
Cab  
FCN  
6
m
Mode  
Activity  
Activity  
s
u
Stat  
s
u
Stat  
r
e
w
Po  
5
4
3
2
1
19  
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CABLE MODEM OPERATION  
1. Cable Modem Power - Indicates power is applied to the cable modem. This light is solid  
green when the modem is on.  
2. Cable Modem Status - This LED varies in color (orange and green) and indicates the  
modem’s status as described in the following chart:  
LED STATE  
REPEATING  
DESCRIPTION  
SHORT OFF, LONG ORANGE  
ORANGE  
SHORT OFF, SHORT ORANGE  
LONG ORANGE, SHORT GREEN  
SHORT OFF, SHORT GREEN  
GREEN  
YES  
NO  
YES  
YES  
YES  
NO  
Startup, power on self test  
Failed power on self test  
Downstream hunt  
Acquisition in process  
Offline/not authorized for service  
Fully operational state  
3. PC Link Status - Indicates that the cable modem is connected to the Ethernet card in your  
computer. This light is solid green when this link is established and your computer is turned  
on.  
4. PC Link Activity - Indicates that data is being transmitted to or from your PC over the  
Ethernet port. Flashing orange indicates traffic. This LED should blink when data is being  
transmitted or received over the Ethernet port.  
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CABLE MODEM OPERATION  
5. Cable Activity - Indicates that data is being transmitted to or from your cable company over  
the RF (cable) port. Flashing orange indicates traffic.  
6. FCN - Individual cable operators determine the function of this LED.  
21  
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CABLE MODEM OPERATION  
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TROUBLESHOOTING AND SUPPORT RESOURCES  
PROBLEM  
POSSIBLE SOLUTION  
I cannot access my 1. Check all connections. Make sure the cable line is securely connected to  
email or Internet  
service.  
the cable jack on the back of the modem. Verify that the RJ 45 cable is  
securely plugged into both the modem and your network interface card.  
Make sure your power supply is properly plugged into both the modem  
and a wall outlet or surge protector. If your cable modem is properly  
connected, the “Cable Modem Power”, “Cable Modem Status”, and  
“PC Link Status” indicator lights on the front of the modem should all  
be a solid color.  
2. Call your cable service provider to verify that their service is two-way.  
This modem is designed for use with two-way cable plants.  
3. Your network interface card may be malfunctioning. Refer to its  
documentation for troubleshooting information.  
4. You may not have installed TCP/IP properly or the TCP/IP parameters  
provided by your cable company may not be correct for your computer.  
The Cable Status The signal from your cable company’s equipment may be too weak or the  
LED never stops  
blinking.  
cable line may not be properly attached to the modem. If the cable line is  
properly connected to the modem, call your cable company to verify  
whether or not a weak signal may be the problem.  
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TROUBLESHOOTING AND SUPPORT RESOURCES  
PROBLEM  
POSSIBLE SOLUTION  
All of LEDs on the 1. If the Cable Modem Power, Cable Modem Status, and PC Link Status  
front of my modem  
look right, but I  
still can’t access  
the Internet.  
LEDs are on but not blinking, your cable modem is operating properly.  
Try shutting down and powering off your computer and then turning it  
back on. This will cause your computer to re-establish  
communications with your cable company’s computer.  
2. You may not have installed TCP/IP properly or the TCP/IP parameters  
provided by your cable company may not be correct for your computer.  
The power on my You may be using the wrong power supply. Check that the power supply  
modem goes on  
and off  
you are using is the one that came with your cable modem.  
sporadically. The  
Cable Modem  
Status light never  
stops blinking.  
24  
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TROUBLESHOOTING AND SUPPORT RESOURCES  
e-mailed to you, send the document's number  
as the subject.  
Support Resources  
3
Com BBS  
World Wide Web  
Dial the 3Com BBS, 847-262-6000, using  
the communications software of your  
choice.  
The 3Com home page contains the same  
information as the Internet on Demand  
listing. Log on to http://support.3com.com  
Internet FTP  
Our ftp site provides a free library  
containing the same files as the BBS site.  
FTP to ftp.usr.com.  
CompuServe  
You can access the same information as the  
Internet FTP site through CompuServe. The  
forum address is GO THREECOM.  
Address private messages to 76711,707.  
Internet on Demand  
Our Internet on Demand site provides  
automated technical support through a  
library containing product information,  
quick reference cards, and installation  
help. To obtain an index of available  
documents, send a blank e-mail to  
[email protected]. To have a document  
America Online  
Go to the Keyword field and type 3COM to  
connect to various 3Com resources, such as  
file libraries, message boards, online  
customer support, and product  
announcements.  
25  
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TROUBLESHOOTING AND SUPPORT RESOURCES  
90-Day Free Installation Support  
If You Are Still Having  
Problems  
3Com offers free 90 day installation  
support for this product. Please call the  
following toll-free number.  
Review this manual.  
Call or visit your modem dealer. They  
may be able to assist you.  
90-Day Free Installation Support  
888-877-5040  
If your dealer can't help you, contact  
3Com Customer Support. When you call,  
specify your modem’s serial number  
(found on the modem and on the outside  
of the box) and the software being used.  
After the 90 day limit, refer to our pay-  
per-call options below.  
Technical Support Hotline  
Technical questions about 3Com  
U.S. Robotics modems can also be  
answered by technical support  
If You Need to Return the  
Modem to Us  
representatives. The hotline is a toll call.  
Hotline  
847-262-2550  
Contact 3Com Customer Support. If the  
support representative determines that you  
need to return the modem, you will receive an  
SRO (Service Repair Order) number. You  
must have an SRO number before returning  
(Hours: 8:00 am - 6:00 pm CST)  
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TROUBLESHOOTING AND SUPPORT RESOURCES  
the modem to us. Ship the unit, postage  
paid, in a strong box made of corrugated  
cardboard with plenty of packing material.  
DO NOT send the modem back in the  
original box. Send ONLY the modem  
(NOT manuals, diskettes, etc.). Include  
your SRO number, name, and address on  
the shipping label as well as inside the  
package. If possible, send the package via  
a courier capable of tracking the progress  
of the shipment. Ship to the following  
address:  
3
Com  
SRO #________  
attn: Dock 15 PCD  
1800 W. Central Ave.  
Mount Prospect, IL 60056  
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TROUBLESHOOTING AND SUPPORT RESOURCES  
28  
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REGULATORY INFORMATION AND LIMITED  
WARRANTY  
(2) this device must accept any interference  
Manufacturer’s Declaration of  
Conformity  
received including interference that may  
cause undesired operations.  
3Com  
Caution to the User  
3800 Golf Road  
Rolling Meadows, IL 60008  
U.S.A.  
The user is cautioned that any changes or  
modifications not expressly approved by the  
party responsible for compliance could void  
the user’s authority to operate the  
equipment.  
declares that the product U.S. Robotics  
Cable Modem CMX conforms to the FCC’s  
specifications:  
Performance Specifications  
Part 15:  
This equipment has a bit-error rate (BER)  
less than 10-8 when the signal-to-noise ratio  
(SNR) is 23.5 dB or greater when operating  
in 64 QAM mode, and when the SNR is  
30.0 dB or greater when operating in 256  
QAM mode.  
Operation is subject to the following two  
conditions:  
(1) this device may not cause harmful  
electromagnetic interference, and  
29  
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REGULATORY INFORMATION AND LIMITED WARRANTY  
States or the country in which you obtained  
them.  
Export Notices  
Unlawful to export from the US or  
Canada without an approved US  
Department of Commerce export  
license.  
The software covered by this agreement  
may contain strong data encryption code  
that cannot be exported outside of the U.S.  
or Canada. You agree that you will not  
export/reexport, either physically or  
electronically, the encryption software or  
accompanying documentation (or copies  
thereof) or any products utilizing the  
encryption software or such documentation  
without obtaining written authorization  
from the U.S. Department of Commerce.  
The hardware contained in this product  
contains encryption software which may  
not be exported or transferred from the  
US or Canada without an approved US  
Department of Commerce export  
license.  
License Agreement  
Industry Canada (IC)  
You agree that you will not export or re-  
export the Software or accompanying  
documentation (or any copies thereof) or  
any products utilizing the Software or such  
documentation in violation of any  
This digital apparatus does not exceed the  
Class B limits for radio noise emissions  
from digital apparatus set out in the  
interference-causing equipment standard  
entitled Digital Apparatus, ICES-003 of  
Industry Canada.  
applicable laws or regulations of the United  
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REGULATORY INFORMATION AND LIMITED WARRANTY  
Cet appareil numérique respecte les limites  
found to comply with the limits for a Class  
B computing device in accordance with the  
specifications in Part 15 of FCC rules,  
which are designed to provide reasonable  
protection against such interference in a  
residential installation.  
de bruits radioélectriques applicables aux  
appareils numériques de Classe B préscrites  
dans la norme sur le matériel brouilleur:  
Appareils Numériques, NMB-003 édictée  
par l'Industrie Canada.  
UL Listing/CUL Listing  
However, there is no guarantee that  
interference will not occur in a particular  
installation. If this device does cause  
interference to radio or television reception,  
which you can determine by monitoring  
reception when the modem is installed and  
when it is removed from the computer, try  
to correct the problem with one or more of  
the following measures:  
This information technology equipment is  
UL-Listed and CUL-Listed for use with  
UL-Listed personal computers that have  
installation instructions detailing user  
installation of card cage accessories.  
Radio and Television Interference  
This equipment generates and uses radio  
frequency energy and if not installed and  
used properly, in strict accordance with the  
manufacturer’s instructions, may cause  
interference to radio and television  
Reorient the receiving antenna (for  
televisions with antenna reception only)  
or cable input device.  
Relocate the computer with respect to  
the receiver.  
reception. This device has been tested and  
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REGULATORY INFORMATION AND LIMITED WARRANTY  
Relocate the computer and/or the  
3
Com Corporation Limited  
receiver so that they are on separate  
branch circuits.  
Warranty  
If necessary, consult your dealer or an  
experienced radio/television technician for  
additional suggestions. You may find the  
following booklet, prepared by the Federal  
Communications Commission, helpful:  
3Com warrants this hardware product to be  
free from defects in workmanship and  
materials, under normal use and service, for  
the following length of time from the date  
of purchase from 3Com or its authorized  
reseller: 5 years. 3Com’s sole obligation  
under this express warranty shall be, at  
3Com’s option and expense, to repair the  
defective product or part, deliver to  
Customer an equivalent product or part to  
replace the defective item, or if neither of  
the two foregoing options is reasonably  
available, 3Com may, in its sole discretion,  
refund to Customer the purchase price paid  
for the defective product. All products that  
are replaced will become the property of  
3Com. Replacement products may be new  
How to Identify and Resolve Radio-  
TV Interference Problems  
Stock No. 004-000-0345-4  
U.S. Government Printing Office  
Washington, DC 20402  
In accordance with Part 15 of the FCC  
rules, the user is cautioned that any changes  
or modifications to the equipment described  
in this manual that are not expressly  
approved by 3Com could void the user’s  
authority to operate the equipment.  
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REGULATORY INFORMATION AND LIMITED WARRANTY  
or reconditioned. 3Com warrants any  
as not meeting this standard. If it appears  
that any product that is stated to meet this  
standard does not perform properly with  
regard to such date data on and after  
January 1, 2000, and Customer notifies  
3Com before the later of April 1, 2000, or  
ninety (90) days after purchase of the  
product from 3Com or its authorized  
reseller, 3Com shall, at its option and  
expense, provide a software update which  
would effect the proper performance of  
such product, repair such product, deliver to  
Customer an equivalent product to replace  
such product, or if none of the foregoing is  
feasible, refund to Customer the purchase  
price paid for such product.  
replaced or repaired product or part for  
ninety (90) days from shipment, or the  
remainder of the initial warranty period,  
whichever is longer.  
YEAR 2000 WARRANTY: In addition to  
the Hardware Warranty stated above, 3Com  
warrants that each product sold or licensed  
to Customer on and after January 1, 1998  
that is date sensitive will continue  
performing properly with regard to such  
date data on and after January 1, 2000,  
provided that all other products used by  
Customer in connection or combination  
with the 3Com product, including  
hardware, software, and firmware,  
Any software update or replaced or repaired  
product will carry a Year 2000 Warranty for  
ninety (90) days after purchase or until  
April 1, 2000, whichever is later.  
accurately exchange date data with the  
3Com product, with the exception of those  
products identified at 3Com’s Web site,  
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REGULATORY INFORMATION AND LIMITED WARRANTY  
Dead- or Defective-on-Arrival. In the event  
a product completely fails to function or  
exhibits a defect in materials or  
OBTAINING WARRANTY SERVICE:  
Customer must contact a 3Com Corporate  
Service Center or an Authorized 3Com  
Service Center within the applicable  
warranty period to obtain warranty service  
authorization. Dated proof of purchase from  
3Com or its authorized reseller may be  
required. Products returned to 3Com's  
Corporate Service Center must be pre-  
authorized by 3Com with a Service Return  
Order (SRO) number marked on the outside  
of the package, and sent prepaid and  
packaged appropriately for safe shipment,  
and it is recommended that they be insured  
or sent by a method that provides for  
tracking of the package. The repaired or  
replaced item will be shipped to Customer,  
at 3Com's expense, not later than thirty (30)  
days after 3Com receives the defective  
product.  
workmanship within the first forty-eight  
(48) hours of installation but no later than  
thirty (30) days after the date of purchase,  
and this is verified by 3Com, it will be  
considered dead- or defective-on-arrival  
(DOA) and a replacement shall be provided  
by advance replacement. The replacement  
product will normally be shipped not later  
than three (3) business days after 3Com’s  
verification of the DOA product, but may  
be delayed due to export or import  
procedures. When an advance replacement  
is provided and Customer fails to return the  
original product to 3Com within fifteen (15)  
days after shipment of the replacement,  
3Com will charge Customer for the  
replacement product, at list price.  
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REGULATORY INFORMATION AND LIMITED WARRANTY  
3Com shall not be responsible for any  
EITHER IN FACT OR BY OPERATION  
OF LAW, STATUTORY OR  
OTHERWISE, INCLUDING  
software, firmware, information, or memory  
data of Customer contained in, stored on, or  
integrated with any products returned to  
3Com for repair, whether under warranty or  
not.  
WARRANTIES, TERMS, OR  
CONDITIONS OF MERCHANTABILITY,  
FITNESS FOR A PARTICULAR  
PURPOSE, SATISFACTORY QUALITY,  
CORRESPONDENCE WITH  
WARRANTIES EXCLUSIVE: IF A  
3COM PRODUCT DOES NOT OPERATE  
AS WARRANTED ABOVE,  
DESCRIPTION, AND NON-  
INFRINGEMENT, ALL OF WHICH ARE  
EXPRESSLY DISCLAIMED. 3COM  
NEITHER ASSUMES NOR  
AUTHORIZES ANY OTHER PERSON  
TO ASSUME FOR IT ANY OTHER  
LIABILITY IN CONNECTION WITH  
THE SALE, INSTALLATION,  
MAINTENANCE OR USE OF ITS  
PRODUCTS.  
CUSTOMER'S SOLE REMEDY FOR  
BREACH OF THAT WARRANTY  
SHALL BE REPAIR, REPLACEMENT,  
OR REFUND OF THE PURCHASE  
PRICE PAID, AT 3COM'S OPTION. TO  
THE FULL EXTENT ALLOWED BY  
LAW, THE FOREGOING WARRANTIES  
AND REMEDIES ARE EXCLUSIVE  
AND ARE IN LIEU OF ALL OTHER  
WARRANTIES, TERMS, OR  
3COM SHALL NOT BE LIABLE UNDER  
THIS WARRANTY IF ITS TESTING  
CONDITIONS, EXPRESS OR IMPLIED,  
35  
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REGULATORY INFORMATION AND LIMITED WARRANTY  
AND EXAMINATION DISCLOSE THAT  
THE ALLEGED DEFECT OR  
FOR INCIDENTAL, CONSEQUENTIAL,  
INDIRECT, SPECIAL, OR PUNITIVE  
DAMAGES OF ANY KIND, OR FOR  
LOSS OF REVENUE OR PROFITS, LOSS  
OF BUSINESS, LOSS OF  
INFORMATION OR DATA, OR OTHER  
FINANCIAL LOSS ARISING OUT OF OR  
IN CONNECTION WITH THE SALE,  
INSTALLATION, MAINTENANCE, USE,  
PERFORMANCE, FAILURE, OR  
MALFUNCTION IN THE PRODUCT  
DOES NOT EXIST OR WAS CAUSED  
BY CUSTOMER'S OR ANY THIRD  
PERSON'S MISUSE, NEGLECT,  
IMPROPER INSTALLATION OR  
TESTING, UNAUTHORIZED  
ATTEMPTS TO OPEN, REPAIR OR  
MODIFY THE PRODUCT, OR ANY  
OTHER CAUSE BEYOND THE RANGE  
OF THE INTENDED USE, OR BY  
ACCIDENT, FIRE, LIGHTNING, OTHER  
HAZARDS, OR ACTS OF GOD.  
INTERRUPTION OF ITS PRODUCTS,  
EVEN IF 3COM OR ITS AUTHORIZED  
RESELLER HAS BEEN ADVISED OF  
THE POSSIBILITY OF SUCH  
DAMAGES, AND LIMITS ITS  
LIABILITY TO REPAIR,  
LIMITATION OF LIABILITY. TO THE  
FULL EXTENT ALLOWED BY LAW,  
3COM ALSO EXCLUDES FOR ITSELF  
AND ITS SUPPLIERS ANY LIABILITY,  
WHETHER BASED IN CONTRACT OR  
TORT (INCLUDING NEGLIGENCE),  
REPLACEMENT, OR REFUND OF THE  
PURCHASE PRICE PAID, AT 3COM'S  
OPTION. THIS DISCLAIMER OF  
LIABILITY FOR DAMAGES WILL NOT  
BE AFFECTED IF ANY REMEDY  
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REGULATORY INFORMATION AND LIMITED WARRANTY  
PROVIDED HEREIN SHALL FAIL OF  
ITS ESSENTIAL PURPOSE.  
the United Nations Convention on  
Contracts for the International Sale of  
Goods.  
DISCLAIMER: Some countries, states, or  
provinces do not allow the exclusion or  
limitation of implied warranties or the  
limitation of incidental or consequential  
damages for certain products supplied to  
consumers, or the limitation of liability for  
personal injury, so the above limitations and  
exclusions may be limited in their  
application to you. When the implied  
warranties are not allowed to be excluded in  
their entirety, they will be limited to the  
duration of the applicable written warranty.  
This warranty gives you specific legal rights  
which may vary depending on local law.  
GOVERNING LAW: This Limited  
Warranty shall be governed by the laws of  
the State of California, U.S.A. excluding its  
conflicts of laws principles and excluding  
37  
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