Linksys BEFCMU10 Ver. 2
Power Red - Modem has Power
Off- Check Power cable, no power
Link/Act Solid - Ethernet/USB connected
Flashing - Activity over Ethernet or USB connection
Off - No Ethernet/USB Connection detected
Send Flashing - Data transmitting through COAX cable
Receive Flashing - Data received through COAX cable
Cable Solid - Modem is online
Flashing - Ranging in Process
Off - Modem Error (Signal Issue more than likely)
Manuals and Support Information

Manual
Manufacturer Site
USB Drivers