Cisco Systems 4027669 Manual De Usuario
28
4028103 Rev A
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.
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 8 (Registering with Call Agent), the
modem proceeds immediately to Normal Operations (AC Power applied).
modem proceeds immediately to Normal Operations (AC Power applied).
Front Panel LED Status Indicators During Initial Power Up, Calibration, and Registration
STEP →
1
2
3
4
5
6
7
8
Front Panel
LED
Power
Up
Self
Test
Downstream
Scan
Downstream
Signal Lock
Ranging
Request
IP
Address
Address
Registering
Register
with Call
Agent
Agent
1
POWER
On
On
On On On
On
On On
2
DS
Blink
On for 1
second
second
Blink On
On On On
On
3
US
Blink
On for 1
second
second
Off Off Blink
On
On On
4
ONLINE
Blink
On for 1
second
second
Off Off Off
Off
Blinking
On
5
LINK
1
Off
On for 1
second
second
On or Blink
On or Blink
On or
Blink
Blink
On or
Blink
Blink
On or Blink
On
1
The LINK LED is on whenever a PC is connected to the modem, and it blinks to indicate that data is being transferred. If the
modem provides telephone service only and is not connected to a PC, the LINK LED is OFF.