The Internet should add convenience, not headaches. From step-by-step instructions to helpful tips, we'll help you install your equipment, troubleshoot problems, and get the most out of your online experience – minus the migraine.
Troubleshooting the Motorola SB5100 Cable Modem
Last Updated: Thu, 14 Nov 2013 > Related Articles
Learn more about the Motorola SB5100 cable modem.
The Motorola SB5100 is a DOCSIS 2.0 cable modem.
After the cable modem has successfully registered on the network, the Power, Receive, Send, and Online indicators illuminate continuously to indicate that the cable modem is online and fully operational. For more details, refer to the Modem Lights section.
The modem lights indicate the current status of your cable modem. To troubleshoot any connection problems, use the table below.
Ethernet or USB Connection - Modem functioning correctly
Modem in Standby - Press the standy button to restore back to normal
Modem Looking for Cable Connection
|Power||Off||No power.||Verify power supply connections, the power switch on the modem itself, the electrical outlet, and make sure the outlet is not connected to a switch.|
|Flashing||An error has occurred during normal operation.||Verify all cable connections and try resetting the modem. If cable is OK and modem reset does not work, contact Customer Support.|
|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 Flashing Modem||Searching 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.|
|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.|
|Send||Flashing||Scanning for the upstream frequency.||Verify all cable connections and try resetting the modem. If cable is OK and modem reset doesn't work, contact Customer Support.|
|Online||Flashing||Scanning for the network connection.|
|Activity||Blinking||None. Transmitting or receiving data.||N/A|
Modem Manual (PDF)