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Front Panel LED Status Indicator Functions
Front Panel LED Status Indicator Functions
Initial Power Up, Calibration, and Registration (AC Power applied)
The following chart illustrates the sequence of steps and the corresponding
appearance of the cable modem front panel LED status indicators during power up,
calibration, and registration on the network when AC power is applied to the cable
modem. Use this chart to troubleshoot the power up, calibration, and registration
process of your cable modem.
Note: After the cable modem completes Step 7 (Registration Completed), the modem
proceeds immediately to Normal Operations. See Normal Operations (AC Power
applied) (on page 35).
Front Panel LED Status Indicators During Initial Power Up, Calibration, and Registration
Step
1
Front Panel
Power
Indicator
Up
1
POWER
On
2
DS
Blinking
3
US
Blinking
4
ONLINE
Blinking
5
LINK
Off
7
TEL1
Off
8
TEL2
Off
9
BATTERY
Off
(optional
model only)
* The ONLINE LED is on whenever a PC is connected to the modem, and it blinks to indicate that data is being transferred. If the
modem is used to provide telephone service only and is not connected to a PC, the ONLINE LED is off.
34
2
3
4
Self
Downstream
Downstream
Test
Scan
Signal Lock
On
On
On
On
Blinking
On
On
Off
Off
On
Off
Off
On
On
On
or
or
Blinking
Blinking
On
Off
Off
On
Off
Off
On
Off
Off
5
6
Ranging
Requesting
IP Address
On
On
On
On
Blinking
On
Off
Off
On
On
or
or
Blinking
Blinking
Off
Off
Off
Off
Off
Off
7
8
Registering
Registration
Completed
On
On
On
On
On
On
Blinking
On
On
On
or
or
Blinking
Blinking
Off
Off
Off
Off
Off
Off
4028520 Rev A
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