3Com HomeConnect 3CP4130 User Manual page 10

ADSL Connection Problems
Symptoms
ADSL LED is blinking
orange
The Dual Link Control
Manager Summary
confirms that the ADSL
status is "down".
The Dual Link Control
Manager> System>
Diagnostics shows that
there is a loss of signal
error.
My ADSL link is not
stable (goes up and down
a lot).
Slow Network Response
Symptoms
I did not first establish a
connection to the modem
through the Dual Link
Control Center.
Possible Cause
The ADSL (modem) cable is not
connected. (This is the RJ11 cable
that plugs into your
ADSL-enabled jack.)
The ADSL cable has been
damaged.
The ADSL cable wiring (inner
pair versus outer pair) is not set
correctly.
There is a problem at the other
end of the ADSL connection that
causes the ADSL negotiation to
fail.
The ADSL cable wiring (inner
pair versus outer pair) is not set
correctly.
The distance from the CO may be
at or near maximum, causing loss
of signal.
Wiring inside the house may be
causing interference from analog
phones or modems.
Possible Cause
Before you can access the Web-based
management screens of the Dual Link
unit, you must first establish a
connection to the Dual Link unit.
Double click 3Com Dual Link Control
Center icon on your desktop. Then
click the Dual Link Manager icon to
launch a browser and bring up the Dual
Link Manager.
Corrective Action
Check that one end of the ADSL
cable is fully plugged into your
DSL-enabled wall plug. Check
that the other end is fully plugged
into the ADSL port in the back of
your modem.
Replace the ADSL cable.
Make sure it is set as specified by
your service provider or use the
Auto Detect setting to allow the
modem to select the correct pair.
Contact your service provider.
Make sure it is set as specified by
your service provider or use the
Auto Detect setting to allow the
modem to select the correct pair.
Check statistics in the Dual Link
Manager Systems> Diagnostics
page. If you see a low upstream
signal-to-noise ratio or a large
number of errors, you may have a
line quality issue. Contact your
service provider.
Make sure any filter or splitter
which you received from your
service provider is installed
properly.
Corrective Action