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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.

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ARRIS / Motorola SB6121

Last Updated: Fri, 29 Aug 2014 > Related Articles

37 rated this

Summary

Learn about the available ports and an explanation of the status lights on an ARRIS / Motorola SB6121 cable modem.

Solution


Installation

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


The ARRIS / Motorola SB6121 is a DOCSIS 3.0 cable modem. If this modem is used with the Ultimate Internet, only available in limited markets, and a Microsoft operating system other than Vista or Windows 7, the registry keys must be updated to enable maximum speed performance.
 

Front View
 


  
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.

Back View
 


  
The ARRIS / Motorola SB6121 has the following ports available on the back of the modem:

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

Modem Lights
 


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

Modem LightStatusProblemSolution
Power
 
OffNo Power.Verify all cable connections and try resetting the modem. If cable is OK and modem reset does not work, contact Customer Support.
Solid GreenNoneN/A

Receive 
 

FlashingScanning for downstream channel is in progress.Verify all cable connections and try resetting the modem. If cable is OK and modem reset does not work, contact Customer Support.
Solid GreenNone. Connection from the computer to the Internet is established on one channel.N/A
Solid BlueNone. The modem is operating on more than one channel (downstream bond mode).N/A

Send

 

OffUpstream channel is inactive.Verify all cable connections and try resetting the modem. If cable is OK and modem reset does not work, contact Customer Support.
FlashingScanning for upstream channel is in progress.Verify all cable connections and try resetting the modem. If cable is OK and modem reset does not work, contact Customer Support.
Solid GreenNone. Connection from the Internet to the computer is established on one channel.N/A
Solid BlueNone. The modem is operating on more than one channel (upstream bond mode).N/A

Online

 

OffNo connection.Verify all cable connections and try resetting the modem. If cable is OK and modem reset does not work, contact Customer Support.
Solid GreenNone. Cable modem is operational.N/A
FlashingNone. Scanning for configuration parameters.N/A

LINK
 

OffNo devices connected.Verify all cable connections and try resetting the modem. If cable is OK and modem reset does not work, contact Customer Support.
FlashingNone. A single device is connected to the Ethernet port and data is being transferred between the PC and the cable modem.N/A
Solid BlueNone. Connected to 1000 Mbps.N/A
Solid AmberNone. Connected at 10 or 100 Mbps.N/A

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.


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