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Diagnostics
The Cable Modem has five status LEDs for diagnostics. You can monitor the LEDs
during installation and during normal operations.
Table 1 shows Cable Modem status LEDs and identifies what each LED light means.
This table will help you to diagnose problems.
Function
Color
Cable
Green
PC
Green
Data
Green
Test
Amber
Power
Green
• – 1 flashing slowly : flashing every 2 seconds (approximately)
• – 2 flashing fast
: flashing every 1 second (approximately)
-
dark for no downstream RF carrier present or power
off
1
-
flashing slowly*
and ranging in progress
2
-
flashing fast*
for registration in progress
-
solid for the Cable Modem registered and ready to
transfer data
-
dark for no carrier to/from PC present or power off
-
solid for carrier to/from PC present
-
dark for no user data going through the Cable Modem
or power off
-
flashing for user data going through the Cable Modem
-
dark for initial self-test of the Cable Modem OK or
power off
-
flashing for initial self-test of the Cable Modem in
progress or software down loading of the Cable
Modem in progress
-
solid for self-test failure of the Cable Modem
-
dark for power off
-
solid for power on
Table 1
Status LEDs
Definition
for downstream RF carrier present
11
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