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ARRIS / Motorola SB5120

 

Details

     

Modem Information

Cable Modem

DOCSIS 2.0 with speeds of up to 25 Mbps on a wired connection.

Not compatible with future speed increases.

What does this mean?DOCSIS 2.0 has a maximum speed of 25 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 SB5120 modem

Click to enlarge.

After the cable modem is successfully registered on the network, the POWER, RECEIVE, SEND, and ONLINE lights are on and the PC/ACTIVITY light flashes when the cable modem is transferring data.

     

Back View

Back View of SB5120 modem

Click to enlarge.

 

The ARRIS / Motorola SB5120 has the following ports available on the back of the modem.

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

MAC Address

MAC Address for SB5120 modem

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

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

Modem Light Status Problem
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 Error has occurred during normal operation. Verify coaxial cable connection and try resetting the modem.
RECEIVE Flashing Scanning for a receive (downstream) channel connection. Verify all cable connections and try resetting the modem.
Off No downstream connection. Verify all cable connections and try resetting the modem.
SEND Flashing Scanning for a send (upstream) channel connection. Verify all cable connections and try resetting the modem.
ONLINE Flashing Scanning for the network connection. Verify all cable connections and try resetting the modem.
PC/ACTIVITY Flashing None. Transmitting or receiving data.
STANDBY On Standby button pressed, Internet service blocked, all other lights are off. Press the Standby button.

Manufacturer Resources

Data Sheet (PDF)

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