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Arris / Surfboard SB6121

Details




Modem Information

DOCSIS 3.0 Cable Modem

4x4 channel bonding with speeds of up to 50 Mbps on a wired connection

Cox recommends a DOCSIS 3.1 modem or gateway

What does this mean?DOCSIS 3.0 modems with 4x4 channel bonding have a maximum speed of 50 Mbps on the Cox network.

Highest Service Level

Essential Classic



Front View

image of Front View of the modem and lights

Click to enlarge.


 

  • The highest service level is based on wired connectivity speeds.
  • After the cable modem is 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.





Back View

image of Back View of the modem

Click to enlarge.


The ARRIS / Surfboard 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



MAC Address

image of MAC sticker

Click to enlarge.


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.

Troubleshooting

image of Modem lights


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

Modem LightStatusProblem
POWER

image of Power light
OffNo power. Verify all cable connections and try resetting the modem.
Solid GreenNone.
RECEIVE

image of Receive light
FlashingScanning for downstream channel. Verify all cable connections and try resetting the modem.
Solid GreenNone - connection from the computer to the Internet established on one channel.
Solid BlueNone - operating on more than one channel (downstream bond mode).
SEND

image of Send light
OffUpstream channel inactive. Verify all cable connections and try resetting the modem.
FlashingScanning for upstream channel. Verify all cable connections and try resetting the modem.
Solid GreenNone - connection from the Internet to the computer established on one channel.
Solid BlueNone - operating on more than one channel (upstream bond mode).
ONLINE

image of Online light
OffNo connection. Verify all cable connections and try resetting the modem.
Solid GreenNone. Operational.
FlashingNone. Scanning for configuration parameters.
LINK

image of Link light
OffNo devices connected. Verify all cable connections and try resetting the modem.
FlashingNone. A single device connected to the Ethernet port and data is being transferred between the computer and the cable modem.
Solid BlueNone - connected to 1000 Mbps.
Solid AmberNone - connected at 10 or 100 Mbps.

Manufacturer Resources

Refer to the SB6121 User's Guide (PDF).

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