Cisco Systems Troubleshoot Your Cisco Modem Issues Effectively

Common Troubleshooting Issues

Common Troubleshooting Issues

This section describes common problems and offers solutions.

I don't understand the front panel status indicators

See Operation of Front Panel Indicators (on page 21), for more detailed information on front panel LED status indicator operation and function.

The Cable Modem does not register an Ethernet connection

Try one of the following solutions:

Verify that your computer has an Ethernet card and that the Ethernet driver software is properly installed. If you purchase and install an Ethernet card, follow the installation instructions very carefully.

Verify the status of the front panel status indicator lights.

The Cable Modem does not register an Ethernet connection after connecting to a hub

If you are connecting multiple PCs to the cable modem, you should first connect the cable modem to the uplink port of the hub using the correct crossover cable. The LINK LED of the hub will illuminate continuously.

The Cable Modem does not register a cable connection

The cable modem works with a standard, 75-ohm, RF coaxial cable. If you are using a different cable, your cable modem will not function properly. Contact your service provider to determine whether you are using the correct cable.

There is no dial tone when I lift the handset

Try the following solutions if you cannot hear a dial tone:

Your telephone wiring may be connected to the wrong RJ-11 port on the cable modem. The cable modem has two telephone ports. Verify that you are connected to the correct telephone port.

There may be a problem with your telephone set. Use a different telephone set and listen to hear dial tone.

There may be a problem with your home telephone wiring. Use a telephone and connect directly to the same RJ-11 port on the back of the unit. If the dial tone is

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