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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

Go Fast - 100 Mbps

   

Front View

image of Front View of the modem and lights

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  • 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 continuously indicate that the cable modem is online and fully operational.

 

     

Back View

image of Back View of the modem

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The ARRIS / Surfboard SB6121 has the following ports 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

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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 device's manufacturer.

Troubleshooting

image of Modem lights


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

Modem Light Status Problem
POWER

image of Power light
Off No power. Verify all cable connections and try resetting the modem.
Solid Green None.
RECEIVE

image of Receive light
Flashing Scanning for a downstream channel. Verify all cable connections and try resetting the modem.
Solid Green None - the connection from the computer to the Internet is established on one channel.
Solid Blue None - operating on more than one channel (downstream bond mode).
SEND

image of Send light
Off The upstream channel is inactive. Verify all cable connections and try resetting the modem.
Flashing Scanning for the upstream channel. Verify all cable connections and try resetting the modem.
Solid Green None - the connection from the Internet to the computer is established on one channel.
Solid Blue None - operating on more than one channel (upstream bond mode).
ONLINE

image of Online light
Off No connection. Verify all cable connections and try resetting the modem.
Solid Green None. Operational.
Flashing None. Scanning for configuration parameters.
LINK

image of Link light
Off No devices are connected. Verify all cable connections and try resetting the modem.
Flashing None. A single device connected to the Ethernet port transfers data between the computer and the cable modem.
Solid Blue None - connected to 1000 Mbps.
Solid Amber None - connected at 10 or 100 Mbps.

Manufacturer Resources

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

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