This manual covers installation and operating instructions for the following 3Com® modems: U.S. Robotics Cable Modem CMX 3CR292-DE56 (model 2940) ® U.S. Robotics Cable Modem CMX 3CR292-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.
TABLE OF CONTENTS 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 Connecting the Cable Modem to Your Computer Installing the Cable Connections CD-ROM Cable Modem Operation Troubleshooting and Support Resour
Regulatory Information and Limited Warranty Manufacturer’s Declaration of Conformity 3Com Corporation Limited Warranty 29 29 32
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 comprehensive communications system that utilizes the cable television network to deliver high-speed data to your computer.
INTRODUCTION • • • 2 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.
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 YOU BEGIN You should now contact your local cable company and verify the following: • 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.
BEFORE YOU BEGIN Preparing Your Workspace • Position your computer so that it is 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. • 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 modem.
BEFORE YOU BEGIN • • Fold-out Quick Installation Guide This User’s Guide & Reference Not Included: • A PC running Windows 95 (or later) or a Macintosh running System 7.
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. 1. Click Start, point to Settings, and then click Control Panel. 2. Double-click the Network icon. 3. A list of installed network components appears.
BEFORE YOU BEGIN your PC to work with your cable modem. When you are finished, turn to “Hardware and Software Installation” (page 11). Configuring the TCP/IP Protocol on a Macintosh PC 7. “TCP/IP” will appear in the list of installed network components. Click OK. 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.
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).
BEFORE YOU BEGIN 10
HARDWARE AND SOFTWARE 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 help to identify your modem.
HARDWARE AND SOFTWARE INSTALLATION ® 1. Remove the mounting template from the Installation Guide. mounting holes These slots fit over the heads of wallmounting 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. 12 2. Place the mounting template against the wall at the location chosen for the cable modem.
HARDWARE AND SOFTWARE INSTALLATION Computer” (page 15). Otherwise, turn to “Installing the Cable Connections CD-ROM” on page 18. EM OD EM BL A EC ING TH NT OU L-M L WA OR SF ION e T UC te ctions. r's Guid TR pla stru e Use Tem ic in th ting bas see oun e for tions, id c ll-m Wa ther s instru te eo Se mple co For re efe &R .
HARDWARE AND SOFTWARE INSTALLATION 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. 1. Place the OfficeConnect device you want at the bottom of the stack on a flat surface.
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.
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.
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. 10 BT SERIA L CATV power supply (to wall outlet) cable line (to cable outlet) RJ-45 cable RJ-45 Cable (to NIC) 4. Plug the computer’s power cord back into the computer. Turn on the computer.
HARDWARE AND SOFTWARE INSTALLATION cable outlet RJ-45 cable (to NIC) 13 2 12 3 11 4 10 5 9 6 8 7 15 25 85 30 80 45 75 50 70 55 65 60 s . Robotic em CMX 3Com U.
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.
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 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.
CABLE MODEM OPERATION 22
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 the cable jack on the back of the modem. Verify that the RJ 45 cable is service. 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.
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 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. This will cause your computer to re-establish the Internet. communications with your cable company’s computer. 2.
TROUBLESHOOTING AND SUPPORT RESOURCES Support Resources 3Com BBS Dial the 3Com BBS, 847-262-6000, using the communications software of your choice. Internet FTP Our ftp site provides a free library containing the same files as the BBS site. FTP to ftp.usr.com. Internet on Demand Our Internet on Demand site provides automated technical support through a library containing product information, quick reference cards, and installation help.
TROUBLESHOOTING AND SUPPORT RESOURCES 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 payper-call options below. Technical Support Hotline Technical questions about 3Com U.S. Robotics modems can also be answered by technical support representatives. The hotline is a toll call.
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.
TROUBLESHOOTING AND SUPPORT RESOURCES 28
REGULATORY INFORMATION AND LIMITED WARRANTY Manufacturer’s Declaration of Conformity (2) this device must accept any interference received including interference that may cause undesired operations. 3Com 3800 Golf Road Rolling Meadows, IL 60008 U.S.A. Caution to the User declares that the product U.S.
REGULATORY INFORMATION AND LIMITED WARRANTY 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.
REGULATORY INFORMATION AND LIMITED WARRANTY 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.
REGULATORY INFORMATION AND LIMITED WARRANTY • Relocate the computer and/or the receiver so that they are on separate branch circuits. 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: How to Identify and Resolve RadioTV Interference Problems Stock No. 004-000-0345-4 U.S.
REGULATORY INFORMATION AND LIMITED WARRANTY or reconditioned. 3Com warrants any replaced or repaired product or part for ninety (90) days from shipment, or the remainder of the initial warranty period, whichever is longer.
REGULATORY INFORMATION AND LIMITED WARRANTY 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.
REGULATORY INFORMATION AND LIMITED WARRANTY 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 AS WARRANTED ABOVE, CUSTOMER'S SOLE REMEDY FOR BREACH OF THAT WARRANTY SHALL BE REPAIR, REPLACEMENT, OR REFUND OF THE PURCHASE PRICE PAID, AT 3COM'S OPTION.
REGULATORY INFORMATION AND LIMITED WARRANTY AND EXAMINATION DISCLOSE THAT THE ALLEGED DEFECT 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. LIMITATION OF LIABILITY.
REGULATORY INFORMATION AND LIMITED WARRANTY 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.
