13
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.
F u n c t i o n
C o l o r
Definition
Cable
Green
-
dark for no downstream RF carrier present or power
off
-
flashing slowly(*1) for downstream RF carrier present
and ranging in progress
-
flashing fast(*2)
for registration in progress
-
solid for the Cable Modem registered and ready to
transfer data
PC
Green
-
dark for no carrier to/from PC present or power off
-
solid for carrier to/from PC present
Data
Green
-
dark for no user data going through the Cable Modem
or power off
-
flashing for user data going thr ough the Cable Modem
Test
Amber
-
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
Power
Green
-
dark for power off
-
solid for power on
Table 1 Status LEDs
(*1) flashing slowly : flashing every 1 seconds (approximately)
(*2) flashing fast : flashing every 0.1 second (approximately)
