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1. Tuning – The cable modem is functional
and searching for a downstream cable
modem service channel on your cable
system.
2. Ranging – The modem is now tuned to a
downstream cable modem channel and
can now receive data. Now it searches for
an upstream channel so that it can send
data.
4. Configuring – The cable modem received
its IP address and is downloading its
configuration file from the Internet
Service Provider (ISP).
Internet On/Off
Cable
Activity
Cable
Link
Message
PC Link
Internet
Internet On/Off
Cable
Activity
Cable
Link
Message
PC Link
Internet
x
x
Internet On/Off
Cable
Activity
Cable
Link
Message
PC Link
Internet
Internet On/Off
Cable
Activity
Cable
Link
Message
PC Link
Internet
x
x
x
Internet On/Off
Cable
Activity
Cable
Link
Message
PC Link
Internet
Internet On/Off
Cable
Activity
Cable
Link
Message
PC Link
Internet
x
x
xx
Activating the Cable Modem
Internet On/Off
Cable
Activity
Cable
Link
Message
PC Link
Internet
Internet On/Off
Cable
Activity
Cable
Link
Message
PC Link
Internet
x
x
xx
x
Initialization Mode
After you install the cable modem and turn it on for the first time (and each time the modem is
reconnected to the power), it goes through five steps before it can be used. Each of these steps is
represented by a different pattern of flashing lights on the front of the modem.
Note: All indicators flash once prior to the initialization sequence.
5. Registering – The cable modem
configuration is complete. It is
registering its “as-configured” settings
with your Cable Operator. Once
complete, the POWER (INTERNET)*, PC
LINK, and CABLE (CABLE ACTIVITY)*
indicators stop flashing and remain on.
Internet On/Off
Cable
Activity
Cable
Link
Message
PC Link
Internet
Internet On/Off
Cable
Activity
Cable
Link
Message
PC Link
Internet
x
3. Connecting – The cable modem is now
commun-icating start-up data both down-
stream and upstream.
The cable company is establishing IP
connectivity with your modem.
* Actual button or LED names may vary per model.
Legend Off On Flashing
X
16500150 IB 12/6/04, 6:36 PM24