Troubleshooting
104
N150 and N300 WiFi DSL Modem Routers
Troubleshoot the Internet Connection
If your modem router cannot access the Internet, check the DSL connection, then the WAN
TCP/IP connection.

Troubleshoot the DSL Link

If your modem router is unable to access the Internet, first determine whether the DSL link
with the service provider is working. The DSL LED indicates the state of this connection.

DSL LED Is Green

If the DSL link LED is green, the ADSL connection is good. You can be confident that the
service provider connected your line correctly and that your wiring is correct.

DSL LED Is Blinking Green

If the DSL LED is blinking green, your modem router is attempting to make an ADSL
connection with the service provider. The DSL LED turns green within several minutes.
If the DSL LED does not turn green, disconnect all telephones on the line. If this solves the
problem, reconnect the telephones one at a time, being sure to use a microfilter on each
telephone. If the microfilters are connected correctly, you can connect all your telephones.
If disconnecting telephones does not result in a green DSL LED, a problem with your wiring
might exist. If the telephone company tested the ADSL signal at your network interface
device (NID), then wiring in your house might be of poor quality.

DSL LED Is Off or Internet LED is Off

If the DSL LED is off, the Internet LED is off, or both are off, disconnect all telephones
on the line. If this solves the problem, reconnect the telephones one at a time, being sure to
use a microfilter on each telephone. If the microfilters are connected correctly, you can
connect all your telephones.
If disconnecting telephones does not result in a green DSL LED, check the following:
•Check that the telephone company made the connection to your line and tested it.
•Verify that you are connected to the correct telephone line. If more than one phone line is
installed, be sure that you are connected to the line with the ADSL service. It might be
necessary to use a swapper if your ADSL signal is on pins 1 and 4 or the RJ-11 jack. The
modem router uses pins 2 and 3.