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This manual covers installation and operating instructions for the following 3Com modems:
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U.S. Robotics Cable Modem CMX CR292-DE56 (model 2940)
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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 tr
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TABLE OF CONTENTS Introduction 1 Cable Modem Features 1 Before You Begin 3 Contacting Your Local Cable Company 3 Preparing Your Workspace 5 You Will Need These Items 5 Configuring the TCP/IP Protocol on a Windows PC 6 Configuring the TCP/IP Protocol on a Macintosh PC 8 Hardware and Software Installation 11 Wall-Mount Installation 11 Desktop Installation 13 OfficeConnect Stacking Installation 13 Connecting the Cable Modem to Your Computer 15 Installing the Cable Connections CD-ROM 18 Cable Mo
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Regulatory Information and Limited Warranty 29 Manufacturer’s Declaration of Conformity 29 3Com Corporation Limited Warranty 32
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INTRODUCTION • Two-way design means that the CMX Congratulations! You have just purchased a sends and receives data over the cable modem that features a pioneering new line (unlike one-way modems, which technology. 3Com, a leader in networking require an analog modem for upstream and data access, is proud to offer you this data) technology that makes Internet access possible at speeds previously only • Plug and play operation ensures easy imagined! setup and installation • DOCSIS-compliant for i
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I 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. 2
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BEFORE YOU BEGIN This chapter ex plains how to prepare your MAC address is 00104B377410. Write computer system for cable modem the MAC address in the blank provided installation. 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 • The modem’s model number (located an account, have the following information on a sticker on the bottom of th
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B EFORE YOU BEGIN You should now contact y our local cable access account that will allow you to company and verify the following: send and receive e-mail, access the World Wide Web, and receive other • You have cable service to your home Internet services. This account must be that supports two-way cable modem established before you can use your access. If your cable company does not cable modem. provide two-way service, the U.S. Robotics Cable Modem CMX will • You have a cable line near your P
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B EFORE YOU BEGIN Relative humidity should be between 5 Preparing Your Workspace and 95%, non-condensing. • Position your computer so that it is • Familiarize yourself with all of the located near your cable outlet. materials in this box. Please read these • The cable modem should be located near installation instructions thoroughly your computer and the cable outlet. before installing your cable modem. There should be plenty of room to guide the cables away from the modem without crimping the
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B EFORE YOU BEGIN wood screws, use #6 pan heads or • Fold-out Quick Installation Guide equivalent. • This User’s Guide & Reference Not Included: Configuring the TCP/IP • A PC running Windows 95 (or later) or a Macintosh running System 7.5 (or Protocol on a Windows PC later) with TCP/IP protocol installed I f you have a PC running Windows 95 or (see the following two sections for more later, you need to make sure the TCP/IP information on installing TCP/IP) communications protocol is in
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B EFORE 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 1. Click Start, point to Settings, and then step 9 on the next page. click Control Panel. 2. Double-click the Network icon. 4. If a similar entry is not present, click Ad
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B EFORE 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 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 1. Double-click your System folder. OK. 2. Double-click Control Panels. 8. Windows will now ask you if you would 3. Look for the TCP/IP Control
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B EFORE 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
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B EFORE YOU BEGIN 10
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HARDWARE AND SOFTWARE INSTALLATION 1. Wall-mount installation (this page) 2. Desktop installation (page 13) NOTE: Before installing your 3. OfficeConnect stacking installation modem, write its serial number in the (page 13) space provided on the first page of this manual. (You’ll find the serial number Wall-Mount Installation above the bar code on the white sticker Your cable modem is capable of being wall- on the back of the modem and on the mounted, if you choose to do so. The outside of the
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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 mounting wall. Do not drive the screws flush to the holes wall. The screw head should be
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® HARDWARE AND SOFTWARE INSTALLATION Computer” (page 15). Otherwise, turn to “Installing the Cable Connections CD-ROM” on page 18. Desktop Installation 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 20" modem. Turn to “Connecting the Cable [ 50 cm ] Modem to Your Computer” (page 15). OfficeConnec
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HARDWARE AND SOFTWARE INSTALLATION securely stack your cable modem with the 3. Keeping the front of the units aligned, OfficeConnect unit(s). If possible, your position the top-most OfficeConnect cable modem should always be the top unit device and rest the bottom of the device in a stack with OfficeConnect products. on the clips' spikes, as shown in step 3 of Small hubs are the only units that should be the illustration on the next page. Push clipped to the top of a cable modem. Follow the clip
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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 inc
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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. power supply (to wall outlet) RJ-45 cable cable line (to cable RJ-45 Cable (to NIC) outlet) 4. Plug the computer’s power cord back into the computer. Turn on the computer. When installation is complete, your se
