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Troubleshooting the Linksys CM100 Cable Modem

Last Updated: Thu, 23 Aug 2012 > Related Articles

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Summary

This article provides an overview of the available ports and an explanation of the status lights on a Linksys CM100 cable modem.

Solution


Installation

If you need help setting up your cable modem, refer to the following articles.


The Linksys CM100 is a DOCSIS 2.0 cable modem. 

Front View

After the cable modem has successfully registered on the network, the Power, Online, and Link indicators illuminate continuously to indicate that the cable modem is online and fully operational. For more details, refer to the Modem Lights section.

Back View

The Linksys CM100 has the following ports available on the back of the modem:

  • Power - Connects the cable modem to the power adapter.
  • USB - Connects to the USB port on your computer.
  • ETHERNET - Connects to the Ethernet port on your computer.
  • Reset - Used to reset the modem. 
  • CABLE - Connects to the cable wall outlet.

    The Reset button is for maintenance purposes only. For more details, refer to the Modem Lights section.

Modem Lights

The modem lights indicate the current status of your cable modem. To troubleshoot any connection problems, use the table below.

Modem LightStatusProblemSolution
PowerSolid GreenNone.N/A
OffNo power.Verify power supply connections and electrical outlet. Also make sure the outlet is not connected to a switch.
DSSlow
Flashing Green		Searching for cable connection.Verify all cable connections and try resetting the modem. If cable is OK and modem reset does not work, contact Customer Support.
Fast Flash ModemSearching for cable connection.If this is a new modem or a replacement modem, contact Cox with the MAC address. If there are several MAC addresses on the modem, use the HFC or RF MAC address. View MAC Address Label.
OffNo connection cable Connection.Verify all cable connections and try resetting the modem. If cable is OK and modem reset does not work, contact Customer Support.
US

Flashing
Green

Looking for upstream.Verify all cable connections and try resetting the modem. If cable is OK and modem reset does not work, contact Customer Support.

Solid Green

Modem found connection.N/A
Online

Solid Green  

Cable modem is registered, network access enabledN/A
LinkSolid GreenNone. Successfully found the computer through an Ethernet connection.N/A
Flashing GreenNone. Modem is transferring data.N/A
OffNo Ethernet foundVerify Ethernet cable connections, the TCP/IP settings and the NIC. The NIC drivers might need to be reinstalled. If this does not resolve the issue, contact Customer Support.

MAC Address Label

MAC addresses are written as 12 digits containing both letters and numbers (0-9, A-F). A MAC address is unique. The first six characters of the MAC address are unique to the manufacturer of the device.

Manufacturer Resources



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