3Com 2940, 2941 manual Troubleshooting and Support Resources

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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

 

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. 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

 

cable line may not be properly attached to the modem. If the cable line is

blinking.

 

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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Contents Page Table of Contents Regulatory Information and Limited Warranty Cable Modem Features IntroductionIntroduction Before YOU Begin Contacting Your Local Cable CompanyBefore YOU Begin Included Preparing Your WorkspaceYou Will Need These Items Configuring the TCP/IP Protocol on a Windows PC Not IncludedAdd Configuring the TCP/IP Protocol on a Macintosh PC Before YOU Begin Before YOU Begin Hardware and Software Installation Wall-Mount InstallationHardware and Software Installation Desktop Installation OfficeConnect Stacking InstallationHardware and Software Installation Connecting the Cable Modem to Your Computer Hardware and Software Installation Serial Catv Installing the Cable Connections CD-ROM Cable Modem Operation LED State Repeating Description Cable Modem Operation Cable Modem Operation Troubleshooting and Support Resources Problem Support Resources If You Need to Return the Modem to Us If You Are Still Having ProblemsDay Free Installation Support Troubleshooting and Support Resources Troubleshooting and Support Resources Performance Specifications Manufacturer’s Declaration of ConformityIndustry Canada IC Export NoticesLicense Agreement UL Listing/CUL Listing Radio and Television Interference3Com Corporation Limited Warranty How to Identify and Resolve Radio- TV Interference ProblemsRegulatory Information and Limited Warranty Regulatory Information and Limited Warranty Regulatory Information and Limited Warranty Regulatory Information and Limited Warranty Provided Herein Shall Fail of ITS Essential Purpose