Troubleshooting
Tips
SURFboard® SB6121
•
DOCSIS® 3.0 Cable Modem
•
User Guide
19
365-095-25896-x.1
Front Panel Icons and Error Conditions
The SB6121 front panel icons provide status information for the following error conditions:
Table 6 – Front Panel Icons and Error Conditions
Icon
Status
If, During Startup:
If, During Normal
Operation
OFF
SB6121 is not properly plugged
into the electrical outlet
SB6121 is unplugged
FLASHING
Downstream receive channel
cannot be acquired
Downstream channel is
lost
FLASHING
Upstream send channel cannot
be acquired
Upstream channel is lost
FLASHING
IP registration is unsuccessful
IP registration is lost
OFF
No connected device is
detected
Device is disconnected