Owner`s manual

CUSTOMER HANDBOOK
30
Troubleshooting
| BASICS
Here are some tips on how to better understand your cable modem.
Troubleshooting
I
MODEM LIGHTS
INDICATION
POWER Steady green usually means the modem is on.
CABLE, SYNC OR
BLOCK SYNC
Steady green usually means modem is connected to the cable. Internet network. Usually flashes during initial synchronization. Off means no
cable connection (call Technical Support at 1-888-TW-CABLE).
PC OR LINK
Steady green means connection to the computer is working. Off means the computer is turned off or not connected. Some modems do not
have this light or an equivalent.
DATA OR ACTIVITY
Flashing or blinking green means data is flowing through the modem. Some modems have a separate light (RD or RX, for example) that indicated
when your modem is receiving data as well as a light (TD, TX or SD, for example) that indicates when your modem is transmitting data.
TEST OR ERROR
Normally off. May flash during initial self-test or software downloading. Steady light usually indicates some failure of the modem or the
network.
STAND BY This light should be off. If lighted, indicates no activity between computer and modem. Call Technical Support at 1-888-TW-CABLE.
Connection Results
Typically, if all connections are properly set, the lights on the front of the
cable modem will go through a series of actions, and different lights will
flash while the final connection is being established.
Once connected, lights will illuminate, indicating that your connection is
functioning properly. For general information on functions of your cable
modem lights use the following Modem Lights/Indication table below to
help identify the functions.
Troubleshooting Tips
•Checkcoaxialcableatthemodemandoutlet.
If the connection on your coaxial cable becomes loose at either your
modem or the cable outlet, you will not be able to send or receive data.
Secure the connection.
•CheckEthernetorUSBcableconnections
If your Ethernet cable or USB cable becomes loose at either your modem
or your computer, you will not be able to send or receive data. Secure the
connection.
•ConrmaCableSignal.
Confirm that your cable signal is active. If you have cable
television service, confirm that you are receiving the signal and that the
channels are clear.