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This manual covers installation and operating instructions for the following 3Com
®
Cable Modem CMX 3 CR292-DE56 (model 2940)
U.S. Robotics
®
Cable Modem CMX 3 CR292-DE40 (model 2941)
U.S. Robotics
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
®
modems:
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Table of Contents
Related Manuals for 3Com 2940, 2941
Summary of Contents for 3Com 2940, 2941
- Page 1 U.S. Robotics 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.
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Page 2: Table Of Contents
ABLE OF Introduction Cable Modem Features Before You Begin Contacting Your Local Cable Company Preparing Your Workspace You Will Need These Items Configuring the TCP/IP Protocol on a Windows PC Configuring the TCP/IP Protocol on a Macintosh PC Hardware and Software Installation Wall-Mount Installation Desktop Installation OfficeConnect Stacking Installation... - Page 3 Regulatory Information and Limited Warranty Manufacturer’s Declaration of Conformity 3Com Corporation Limited Warranty...
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Page 4: Introduction
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! This external cable modem is one part of a... - Page 5 NTRODUCTION 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.
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Page 6: Before You Begin
EFORE This chapter explains how to prepare your computer system for cable modem installation. 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:... - Page 7 U.S. Robotics cable modem that will work with your cable company. You can also visit the following URL for additional information: http://www.3com.com/cablemodem Your cable company has set up your cable Internet access account. Your cable company will establish an Internet EFORE...
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Page 8: Preparing Your Workspace
Do not stack anything on top of the cable modem. (See the instructions on page 13 concerning stacking this modem with 3Com OfficeConnect products.) The temperature in the room where the cable modem will be operating should be between 0 and 40 C (32 and 104 F). -
Page 9: Configuring The Tcp/Ip Protocol On A Windows Pc
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 configuration. Other networking cards will work but the screen images will look somewhat different. - Page 10 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.
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Page 11: Configuring The Tcp/Ip Protocol On A Macintosh Pc
7. “TCP/IP” will appear in the list of installed network components. Click 8. Windows will now ask you if you would like to restart your computer. Click No. 9. Your cable company may provide you with additional TCP/IP setup instructions. Consult those instructions, if provided, to complete configuration of EFORE EGIN... - Page 12 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.
- Page 13 EFORE EGIN...
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Page 14: Hardware And Software Installation
ARDWARE AND 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... - Page 15 ARDWARE AND 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. OFTWARE NSTALLATION 1.
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Page 16: Desktop Installation
Turn to “Connecting the Cable Modem to Your Computer” (page 15). 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... - Page 17 ARDWARE AND securely stack your cable modem with the 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.
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Page 18: Connecting The Cable Modem To Your Computer
ARDWARE AND OFTWARE NSTALLATION 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... - Page 19 ARDWARE AND 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.
- Page 20 ARDWARE AND 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. cable line (to cable outlet) 4.
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Page 21: Installing The Cable Connections Cd-Rom
ARDWARE AND 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. -
Page 22: Cable Modem Operation
ABLE ODEM PERATION 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. - Page 23 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 SHORT OFF, LONG ORANGE ORANGE...
- Page 24 ABLE ODEM PERATION 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.
- Page 25 ABLE ODEM PERATION...
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Page 26: Troubleshooting And Support Resources
ROUBLESHOOTING AND PROBLEM POSSIBLE SOLUTION 1. Check all connections. Make sure the cable line is securely connected to I cannot access my email or Internet the cable jack on the back of the modem. Verify that the RJ 45 cable is service. - Page 27 ROUBLESHOOTING AND PROBLEM POSSIBLE SOLUTION 1. If the Cable Modem Power, Cable Modem Status, and PC Link Status All of LEDs on the front of my modem LEDs are on but not blinking, your cable modem is operating properly. look right, but I Try shutting down and powering off your computer and then turning it still can’t access back on.
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Page 28: Support Resources
Internet FTP site through CompuServe. The forum address is GO THREECOM. Address private messages to 76711,707. 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... -
Page 29: If You Are Still Having Problems
ROUBLESHOOTING AND 90-Day Free Installation Support 3Com offers free 90 day installation support for this product. Please call the following toll-free number. 90-Day Free Installation Support 888-877-5040 After the 90 day limit, refer to our pay- per-call options below. Technical Support Hotline Technical questions about 3Com U.S. - Page 30 ROUBLESHOOTING AND UPPORT ESOURCES 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.).
- Page 31 ROUBLESHOOTING AND UPPORT ESOURCES...
- Page 32 EGULATORY Manufacturer’s Declaration of Conformity 3Com 3800 Golf Road Rolling Meadows, IL 60008 U.S.A. declares that the product U.S. Robotics Cable Modem CMX conforms to the FCC’s specifications: Part 15: Operation is subject to the following two conditions: (1) this device may not cause harmful...
- Page 33 EGULATORY Export Notices Unlawful to export from the US or Canada without an approved US Department of Commerce export license. 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.
- Page 34 EGULATORY Cet appareil numérique respecte les limites 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 This information technology equipment is UL-Listed and CUL-Listed for use with UL-Listed personal computers that have installation instructions detailing user...
- Page 35 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. NFORMATION AND IMITED...
- Page 36 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...
- Page 37 (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.
- Page 38 EGULATORY 3Com shall not be responsible for any 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 EXCLUSIVE: IF A 3COM PRODUCT DOES NOT OPERATE...
- Page 39 FINANCIAL LOSS ARISING OUT OF OR IN CONNECTION WITH THE SALE, INSTALLATION, MAINTENANCE, USE, PERFORMANCE, FAILURE, OR 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,...
- Page 40 EGULATORY PROVIDED HEREIN SHALL FAIL OF ITS ESSENTIAL PURPOSE. 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.