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Chapter 3 Operation of Front Panel Indicators
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 (Data Network Registration
Complete), the cable modem proceeds immediately to Normal Operations. See
Normal Operations (AC Power applied) (on page 24).
Front Panel LED Status Indicators During Initial Power Up, Calibration, and
Registration
Step:
Front Panel
Indicator
1
POWER
2
DS
3
US
4
ONLINE
5
LINK
6
TEL 1
7
TEL 2
8
BATTERY
Front Panel LED Status Indicators During Initial Power Up, Calibration, and
Registration
Step:
Front Panel
Indicator
1
POWER
2
DS
3
US
4
ONLINE
22
Part 1, High Speed Data Registration
1
2
3
Self
Downstream
Downstream
Test
Scan
Signal Lock
On
On
On
On
Blinking
On
On
Off
Off
On
Off
Off
Off
On or Blinking
On or Blinking
On
Off
Off
On
Off
Off
On – When battery is charged
Blinks – When battery charge is low
Off – When there is no battery in the unit
Part 2, Telephone Registration
7
8
Data Network
Requesting
Registration
Telephone IP
Complete
Address
On
On
On
On
On
On
On
On
4
5
Requesting IP
Ranging
Address
On
On
On
On
Blinking
On
Off
Off
On or
On or Blinking
Blinking
Off
Off
Off
Off
9
10
Request
Restarting Voice
Telephone
Service
Provisioning File
On
On
On
On
On
On
On
On
6
Request High Speed
Data Provisioning
File
On
On
On
Blinking
On or
Blinking
Off
Off
11
Telephone
Registration
Complete
On
On
On
On
4027620 Rev A
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Troubleshooting
