• Shopping Cart
  • Contact Us
  • Select a Location
    Select a Location

    Current Location:

    Let us know the location you'd like to browse.

    OR
  • View Cart

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

Not compatible with future speed increases

What does this mean?DOCSIS 3.0 modems with 4x4 channel bonding have a maximum speed of 50 Mbps on the Cox network. Cox recommends a DOCSIS 3.0 16x4 or higher device for optimal Internet performance.

Highest Service Level

Essential

   

Front View

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

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

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

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

Power light

Off No power. Verify all cable connections and try resetting the modem.
Solid Green None.

RECEIVE

Receive light

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

SEND

Send light

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

ONLINE

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

Link light

Off No devices connected. Verify all cable connections and try resetting the modem.
Flashing None - a single device connected to the Ethernet port and data is being transferred 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

Search for More Articles

Image of 2 Chat Bubbles

Need More Help? Let's chat!

Chat live with a Cox agent to get the fastest answers to all your top questions.

Modal Id: ttps:--www.cox.com-residential-modals-support-call-jcr:content-parcontent-sectioncontainer.html