Chapter 7: Troubleshooting | 105
N300 Wireless Gigabit ADSL2+ Modem Router DGN3500 User Manual
Troubleshooting the ISP Connection
If your router is unable to access the Internet, you should check the ADSL connection, then
the WAN TCP/IP connection.
ADSL Link
If your router is unable to access the Internet, you should first determine whether you have
an ADSL link with the service provider. The state of this connection is indicated with the
Internet LED.
ADSL Link LED Is Green or Blinking Green
If your ADSL link LED is green or blinking green, then you have a good ADSL connection.
You can be confident that the service provider has connected your line correctly and that
your wiring is correct.
ADSL Link LED Is Blinking Amber
If your ADSL link LED is blinking amber, then your wireless modem router is attempting to
make an ADSL connection with the service provider. The LED should turn green within
several minutes.
If the ADSL link LED does not turn green, disconn
ect 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 should be able to connect all your
telephones.
If disconnecting telephones does not result in a green ADSL link LED, there might be a
p
roblem with your wiring. If the telephone company has tested the ADSL signal at your
network interface device (NID), then you might have poor-quality wiring in your house.
ADSL Link LED Is Off
If the ADSL link LED is 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 should be able to connect all your telephones.
If disconnecting telephones does not result in a gre
en ADSL link LED, check for the following:
• Check that
the telephone company has made the connection to your line and tested it.
• V
erify that you are connected to the correct telephone line. If you have more than one
phone line, 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
wireless modem router uses pins 2 and 3.
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