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User’s Guide
29
Installation problems with the cable modem are commonly due to the cable network and its topography.
LEDs on the front panel of the cable modem reveal operational status and help you determine problem
areas.
LEDs indications ( “X” means not applicable)
Initialization
Sequence
power usb enet send recv sync ready
Power ON
On Off Off Off Off Off Off
Hardware
Testing
On Off Off Off Off Off Off
Search
Downstream
Channel
On X X X Blink Off Off
Downstream
Locked
On X X X X On
Slow
Blink
Search
Upstream
Channel
On X X X X On Fast Blink
Ranging OK
and
Registration
Success
On X X X X On On
Ethernet Port power usb enet send recv sync ready
Send Data
On Off Blink Blink X On On
Receive Data
On Off Blink X Blink On On
USB Port power usb enet send recv sync ready
Send Data
On Blink Off Blink X On On
Receive Data
On Blink Off X Blink On On