Troubleshooting 4-1
v1.1, September 2006
Chapter 4TroubleshootingThis chapter gives information about troubleshooting your DM111P ADSL2+ Ethernet Modem.
After each problem description, instructions are provided to help you diagnose and solve the
problem. For the common problems listed, go to the section indicated.
• Is the modem on?
Go to “Basic Functioning” on page 4-1.
• Have I connected the modem correctly?
Go to “Basic Functioning” on page 4-1.
• I can’t access the modem’s configuration with my browser.
Go to “Troubleshooting the Web Management Interface” on page4-4.
• I’ve configured the modem but I can’t access the Internet.
Go to “Troubleshooting the Internet Connection” on page4-5.
• I can’t remember the modem’s management utility password.
Go to “Restoring the Default Configuration and Password” on page 4-7.
• I want to clear the modem configuration and start over again.
Go to “Restoring the Default Configuration and Password” on page 4-7.
Basic Functioning
After you turn on power to the modem, the following sequence of events should occur:
1. When power is first applied, verify that the Power LED initially displays red to indicate that
the self-test procedure is running (see “The Modem’s Front Panel” on page1 - 5 for an
illustration and explanation of the LEDs).
2. After approximately 10 seconds, verify that:
a. The Power LED changes color from red to green.
b. The LAN port LEDs is lit to indicate that the modem is connected to your PC or router.