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Troubleshooting
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AC1600 WiFi VDSL/ADSL Modem Router Model D6400
• Make sure that Java, JavaScript, or ActiveX is enabled in your browser. If you are using
Internet Explorer, click the Refresh button to be sure that the Java applet is loaded.
• Try quitting the browser and launching it again.
• Make sure that you are using the correct login information. The user name is admin
, and
the default password is
password. Make sure that Caps Lock is off when you enter this
information.
• If you are attempting to set up your modem router behind an existing router in your
network, set up the modem router as a WiFi access point (see Use the Modem Router as
a WiFi Access Point on page 115).
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 lights 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 a DSL (ADSL
or VDSL) connection with the service provider. If the modem router establishes a DSL
connection, the DSL LED turns solid green. This connection process generally lasts several
minutes.
If the DSL LED does not turn solid 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 or VDSL 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.