Operation Manual

Chapter 3 Operation of Front Panel Indicators
22 OL-31573-01
Initial Power On, 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 on,
calibration and registration on the network when AC power is applied to the cable
modem. Use this chart to troubleshoot the power on, calibration, and registration
process of your cable modem.
Note: After the cable modem completes Step 7 (Data Network Registration
Complete), the cable modem proceeds to telephone registration, and then to normal
operations. See Normal Operations (AC Power applied) (on page 24).
Front Panel LED Status Indicators During Initial Power On, Calibration, and
Registration
Part 1, High Speed Data Registration
Step:
1
2
3
4
5
6
Front Panel
Indicator
Self
Test
Downstream
Scan
Downstream
Signal Lock
Ranging
Requesting IP
Address
Request High Speed
Data Provisioning
File
1
POWER
On
On
On
On
On
On
2
DS
On
Blinking
On
On
On
On
3
US
On
Off
Off
Blinking
On
On
4
ONLINE
On
Off
Off
Off
Off
Blinking
5
LINK
On
On or Blinking
On or Blinking
On or
Blinking
On or Blinking
On or
Blinking
6
TEL 1
On
Off
Off
Off
Off
Off
7
TEL 2
On
Off
Off
Off
Off
Off
8
BATTERY

On – When the battery is charged

Blinks – When the battery charge is low

Off – When there is no battery in the unit