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Troubleshooting the Linksys BEFCMU10v4 Cable Modem
Last Updated: Mon, 22 Apr 2013 > Related Articles
Summary
This article provides an overview of the available ports and an explanation of the status lights on a Linksys BEFCMU10v4 cable modem.
Solution
The Linksys BEFCMU10v4 is a DOCSIS 2.0 cable modem.
Front View
After the cable modem has successfully registered on the network, the Power, Cable, and USB or Ethernet 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 BEFCMU10v4 has the following ports available on the back of the modem:
- POWER - Connects the cable modem to the power adapter.
- RESET - Used to reset the modem.
- Ethernet - Connects to the Ethernet port on your computer.
- USB - Connects to the USB port on your computer.
- CABLE - Connects to the cable wall outlet.
Note: The RESET button is for maintenance purposes only. For more details, refer to the Modem Lights section.
Modem Light | Status | Problem | Solution |
|---|---|---|---|
Power | Solid Green. | None. Power is properly connected. | N/A |
| Off | No power | Verify power supply connections and electrical outlet. Also make sure the outlet is not connected to a switch. | |
| DS | Slow Flashing green | Searching for cable connection. | Verify all cable connections and try resetting the modem. If cable is OK and modem reset doesn't work, contact Customer Support. |
| Fast Flash Modem | Searching for cable connection. | If this is a new modem or a replacement modem, you must contact Cox with your MAC address. If there are several MAC addresses on the modem, use the “HFC” or “RF” MAC address. View MAC Address Label | |
| Off | No connection cable connection. | Verify all cable connections and try resetting the modem. If cable is OK and modem reset doesn't 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 doesn't work, contact Customer Support. |
| Solid green | None. Modem found connection. | N/A | |
| Online | Solid green | None. Cable modem is registered, network access enabled. | N/A |
| Ethernet | Solid Green | None. Successfully found the computer through an Ethernet connection. | N/A |
| Off | No Ethernet found. | Verify Ethernet cable connections, the TCP/IP settings and the NIC. You might need to reinstall the NIC drivers. If this does not resolve the issue, contact Customer Support. | |
| Flashing green | traffic is passing through the cable modem port. | N/A | |
| USB | Solid Green | None. Successfully found the computer through USB connection. | N/A |
| Off | No USB found. | Verify USB cable connections, the TCP/IP settings and the USB cable. You might need to reinstall the USB drivers. If this does not resolve the issue, contact Customer Support. | |
| Flashing green | None. Traffic is passing through the cable modem port. | N/A |
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