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Detailed Front Panel Indicator Functions
This chart illustrates the sequence of steps and the corresponding appearance of the cable modem front panel indicators
during power up, calibration, and registration on the network. Use this chart to troubleshoot the power up, calibration,
and registration process of your cable modem.
Front Panel Indicators During Initial Power Up, Calibration, and Registration
Front Panel Indicators During Initial Power Up, Calibration, and Registration
Step
1 POWER
Front Panel
Indicator
1
ON
Power
Up
2PC
3 DATA
4 CABLE
OFF
OFF
OFF
2
ON
Self
Test
ON
ON
ON
8
ON
Registration
Completed
ON
ON
ON
3
ON
Downstream
Scan
ON
or
BLINKING
OFF
SLOW
BLINKING
1 time per second
ON
or
BLINKING
MOMENTARY
ON
4
ON
Downstream
Signal Lock
OFF
5
ON
Ranging
ON
or
BLINKING
OCCASIONAL
BLINKING
OFF
ON
or
BLINKING
SLOW
BLINKING
1 time per second
6
ON
Requesting
IP Address
OCCASIONAL
BLINKING
ON
or
BLINKING
RAPID
BLINKING
4 times per second
7
ON
Registering
OCCASIONAL
BLINKING
T9919