DOCSIS 1.0/ 1.1 Equivalent Cable Modem
Chapter 6 Cable Modem LED Operation
There are no user controls on your cable modem. To operate, simply apply power to
the unit by inserting the AC Adapter into an AC power outlet. Connecting the AC
adapter to an AC protection circuit is always recommended.
1. LEDs mean
Your cable modem provides status information to the user. Five Light-Emitting-Diodes
(LEDs) located on the front panel provide this information as detailed in Table 3.1 or
Table 3.2.
Table 3.1 LED Indicators ( with USB port )
NAME
COLOR
MODE
STATUS
Power Green On
O.K.
On Ready
Cable Green
Blinking Not
Ready
LAN Green On
Connected
USB Green On
Connected
Activity Green
Blinking Cable
Modem
Transmit/Receive Data via
Ethernet or USB
Table 3.2 LED Indicators ( without USB port )
NAME
COLOR
MODE
STATUS
Power Green On
O.K.
On Ready
Cable Green
Blinking Not
Ready
LAN Green On
Connected
RX
Green
Blinking
Receive Data from Cable (RF)
TX
Green
Blinking
Transmit data from Ethernet to
Cable (RF)
2. LED power-on sequence:
a). Power LED on. (It indicates that CM gets power from the power adapter.)
b). All LEDs but POWER blink 2X. (Blinking twice for a second after booting up. It
means SDRAM and Flash are O.K., and CM is ready to work. )
c).Cable LED blinks fast. (Blinking thrice per second. CM is trying to find DS
frequency.)
d). Cable LED blinks slow. (Blinking once per second. CM is trying to find US
channel, DS was found now.)
e). Cable LED blinks really slow. (Blinking 2 seconds a time. CM is trying to register
to CMTS/DHCP/TFTP. )
f). Cable LED ON. (Solid on. CM is operational.)
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