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ROUBLESHOOTING
The table below lists symptoms of common problems, possible causes, and possible solutions. For additional troubleshooting
information from the User Guide, FAQs, and other technical notes, refer to:
http://www.remoteaccess.3com.com/support/docs/lanmodem/welcome.html.
Symptom
Possible Cause
Launching your
Incompatible IP
Web browser
address on your
does not start the
computer.
configuration
process (the
welcome
message does not
appear).
Web browser needs
the IP address of the
ISDN LAN Modem.
Web browser may
not be set to a
default start page.
Web browser may be
configured to use a
proxy server.
There is a
configuration
problem.
Clicking "submit"
JavaScript may not be
during configura-
enabled in your Web
tion does not
browser.
take you to the
next screen.
At installation,
Wrong cable used to
LAN LED does not
connect your
light.
computer to the LAN
Modem's LAN port.
At installation,
An internal failure.
ALERT LED
remains lit.
At installation,
Self-test failure, or
ALERT LED
the LAN Modem is in
continues to
firmware download
flash.
mode
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Solution
Reset the IP address on your computer, as follows:
Windows 98 and 95: Run Winipcfg.exe. Select the Ethernet adapter connected to the ISDN LAN Modem.
Click Release All and then Renew All.
Windows NT 4.0: Run ipconfig /release and then ipconfig /renew.
Macintosh: From the Apple menu, select Control Panels and then TCP/IP. Make sure Ethernet is selected in the
Connect via field. In the Configure field, select Using BootP Server to clear the fields, then close and save changes.
Open the TCP/IP control panel again and select Using DHCP Server. The fields should now read <will be
supplied by server>. Select File, then Close, and save changes when prompted.
Enter the following URL in your Web browser: http://3com.oc.lanmodem. Alternatively, you can enter
http://192.168.1.1.
Launch your Web browser and enter a default URL, as follows:
Internet Explorer: From the View menu, select Options. From Page, select Start Page, and then enter an address
in the address field, such as http://www.3com.com.
Netscape: From the Options menu, select General Preferences. From Browser Starts With, select Home Page
Location, and then enter a URL such as http://www.3com.com.
Launch your Web browser, and then set the browser to use the LAN Modem, as follows:
Internet Explorer: From the View menu, select Internet Options, and then the Connection tab. Under the Proxy
Server header, uncheck the box labeled Accessing the Internet using a proxy server.
Netscape: From the Edit menu, select Preferences. Double-click Advanced, and then click Proxies. Check the box
labeled Direct Connection to the Internet.
Reset the ISDN LAN Modem to the factory default setting. Disconnect the ISDN cable from the ISDN LAN Modem
and then connect an analog telephone to one of the phone ports. Lift the handset and press **3266# and then
replace the handset. Reconnect the ISDN cable, restart your computer, and then launch your Web browser.
Enable JavaScript via your Web browser's configuration options.
Make sure you are using the 8-pin to 8-pin cable labeled Ethernet which was provided with your ISDN LAN
Modem. If you are using another 10BASE-T Ethernet (Category 5) cable, it must be a straight-through cable.
Notify your reseller or technical support that the ISDN LAN Modem has failed the self-test.
Power cycle the ISDN LAN Modem. If the ALERT LED continues to flash, the ISDN LAN Modem has failed the self-
test. Contact your network supplier. If the ALERT LED is not flashing, then the LAN Modem is now operating
correctly.
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