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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. 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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Содержание 2940, 2941

Страница 1: ...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 Me...

Страница 2: ...ring 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 Modem Operation 19 Troubleshooting and Support Resources 23 Support Resources 25 If You Are Still Having Problems 26 If You Need to...

Страница 3: ...Regulatory Information and Limited Warranty 29 Manufacturer s Declaration of Conformity 29 3Com Corporation Limited Warranty 32 ...

Страница 4: ...n network at burst rates of up to 38 megabits per second Mbps Cable Modem Features User data rates of up to 3000K faster than 56K analog modems ISDN or ADSL 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 Plug and play operation ensures easy setup and installation DOCSIS compliant for interoperabili...

Страница 5: ...ard 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 ...

Страница 6: ...t have the following information handy 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 following example label image the MAC address is 00104B377410 Write the MAC address in the blank provided below The modem s model number located on a sticker on the bottom of the modem You...

Страница 7: ...n http www 3com com cablemodem Your cable company has set up your cable Internet access account Your cable company will establish an Internet 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 a cable line near your PC and it has been prepared for c...

Страница 8: ...ncerning 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 Relative humidity should be between 5 and 95 non condensing Familiarize yourself with all of the materials in this box Please read these installation instructions thoroughly before installing your cable modem CAUTION Your cable ...

Страница 9: ...rew heads should be at least 0 2 5mm in diameter for them to be properly captured in the slot If you are using wood screws use 6 pan heads or equivalent Configuring the TCP IP Protocol on a Windows PC 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 ...

Страница 10: ...Control Panel 2 Double click the Network icon 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 If an entry similar to this is present go to step 9 on the next page 4 If a similar entry is not present click Add 5 Click Prot...

Страница 11: ...instructions Consult those instructions if provided to complete configuration of 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 1 Double click your System folder 2 Double click Control Panels 3...

Страница 12: ...osh 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 ...

Страница 13: ...BEFORE YOU BEGIN 10 ...

Страница 14: ...he cable modem hardware you need to determine how you want to incorporate the modem into your work environment There are three installation options 1 Wall mount installation this page 2 Desktop installation page 13 3 OfficeConnect stacking installation page 13 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 tw...

Страница 15: ...g 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 6 mm away from the wall so it c...

Страница 16: ... 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 modem Turn to Connecting the Cable Modem to Your Computer page 15 OfficeConnect Stacking In...

Страница 17: ...the next page 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 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 ...

Страница 18: ... 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 ...

Страница 19: ...ctor 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 c...

Страница 20: ...Consult the chapter titled Cable Modem Operation for a more in depth description of the front panel LED indicators CATV SERIAL 10 BT cable line to cable outlet RJ 45 Cable power supply to wall outlet RJ 45 cable to NIC 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 ...

Страница 21: ...able to wall outlet 3Com U S Robotics Cable Modem CMX 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 ...

Страница 22: ...Ds 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 Cable Modem PC Link Cable Status Power Status Activity Activity FCN 3Com U S Robot...

Страница 23: ... YES NO YES YES YES NO DESCRIPTION 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...

Страница 24: ...ION 21 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 ...

Страница 25: ...CABLE MODEM OPERATION 22 ...

Страница 26: ...e 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 ...

Страница 27: ...k Status 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 You may be u...

Страница 28: ...help To obtain an index of available documents send a blank e mail to support usr com To have a document e mailed to you send the document s number as the subject World Wide Web The 3Com home page contains the same information as the Internet on Demand listing Log on to http support 3com com CompuServe You can access the same information as the Internet FTP site through CompuServe The forum addres...

Страница 29: ...ives The hotline is a toll call Hotline 847 262 2550 Hours 8 00 am 6 00 pm CST If You Are Still Having Problems Review this manual Call or visit your modem dealer They may be able to assist you 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 If You Need to Retur...

Страница 30: ... 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 3Com SRO ________ attn Dock 15 PCD 1800 W Central Ave Mount Prospect IL 60056 ...

Страница 31: ...TROUBLESHOOTING AND SUPPORT RESOURCES 28 ...

Страница 32: ...ence and 2 this device must accept any interference received including interference that may cause undesired operations Caution to the User 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 Performance Specifications This equipment has a bit error rate BER less than 10 8 wh...

Страница 33: ...any applicable laws or regulations of the United States or the country in which you obtained them 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 ut...

Страница 34: ...h the manufacturer s instructions may cause interference to radio and television reception This device has been tested and 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 However there is no guarantee that interfere...

Страница 35: ...e not expressly approved by 3Com could void the user s authority to operate the equipment 3Com Corporation Limited Warranty 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 sha...

Страница 36: ... the exception of those products identified at 3Com s Web site http www 3com com products yr2000 html 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...

Страница 37: ...to Customer at 3Com s expense not later than thirty 30 days after 3Com receives the defective product Dead or Defective on Arrival In the event a product completely fails to function or exhibits a defect in materials or 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 dea...

Страница 38: ...ION TO THE FULL EXTENT ALLOWED BY LAW THE FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN LIEU OF ALL OTHER WARRANTIES TERMS OR CONDITIONS EXPRESS OR IMPLIED EITHER IN FACT OR BY OPERATION OF LAW STATUTORY OR OTHERWISE INCLUDING WARRANTIES TERMS OR CONDITIONS OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE SATISFACTORY QUALITY CORRESPONDENCE WITH DESCRIPTION AND NON INFRINGEMENT ALL...

Страница 39: ...EXCLUDES FOR ITSELF AND ITS SUPPLIERS ANY LIABILITY WHETHER BASED IN CONTRACT OR TORT INCLUDING NEGLIGENCE 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 INTERRUPTION O...

Страница 40: ...jury 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 ...

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