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ARRIS / Motorola SB5120

Last Updated: Mon, 17 Aug 2015 > Related Articles

26 rated this

Summary

Learn about the available ports and the status lights on an ARRIS / Motorola SB5120 cable modem.

Solution

 


The ARRIS / Motorola SB5120 is a DOCSIS 2.0 cable modem.

  

Front View 

 
Front View of SB5120 modem

 
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. For more information, refer to the Modem Lights section.

Back View 

 
Back View of SB5120 modem

 
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.

Modem Lights 

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

Modem LightStatusProblemSolution
POWEROffNo powerVerify power supply connections, the power switch on the modem itself, the electrical outlet, and make sure the outlet is not connected to a switch.
FlashingError has occurred during normal operationVerify coaxial cable connection and try resetting the modem. If cable is ok and reset does not work, contact Customer Support.
RECEIVEFlashingScanning for a receive
(downstream) channel connection
Verify all cable connections and try resetting the modem. If cable is OK and modem reset does not work, contact Customer Support.
OffNo connection cable connectionVerify all cable connections and try resetting the modem. If cable is OK and modem reset does not work, contact Customer Support.
SENDFlashingScanning for a send (upstream)
channel connection
Verify all cable connections and try resetting the modem. If cable is OK and modem reset does not work, contact Customer Support.
ONLINEFlashingScanning for the network connection.Verify all cable connections and try resetting the modem. If cable is OK and modem reset does not work, contact Customer Support.
PC/ACTIVITYFlashingNone - transmitting or receiving dataN/A
STANDBYOnStandby button pressed - Internet service blocked, all other lights are offPress the Standby button.

MAC Address Label

 
MAC Address for SB5120 modem
 

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.

Manufacturer Resources 

Data Sheet (PDF)


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