8
T
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
Solution
Launching your Web
browser does not start
the configuration
process (the welcome
message does not
appear).
Incompatible IP address on
your computer.
Reset the IP address on your computer, as follows:
Windows 98 and 95:
Run
Winipcfg.exe.
Select the Ethernet adapter connected to the 56K 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.
Web browser needs the IP
address of the LAN Modem.
Enter the following URL in your Web browser:
http://3com.oc.lanmodem.
Alternatively, you
can enter
http://192.168.1.1.
Web browser may not be set
to a default start page.
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.
Web browser may be
configured to use a proxy
server.
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.
There is a configuration
problem.
Reset the 56K LAN Modem to the factory default setting as follows: Press and continue to hold in
the reset button on the back of the unit. (You must continuously hold the reset button through three
cycles of LED flashing: Reset, Firmware Download Mode, and Factory Default Reset.) After the ALERT
LED has flashed for the third cycle, you have successfully reset the LAN Modem back to factory
defaults. Release the reset button.
The LAN Modem reinitializes itself and is reset to the factory defaults. All user-entered information will
be erased. Restart your computer and launch your Web browser.
Clicking “submit”
during configuration
does not take you to
the next screen.
JavaScript may not be
enabled in your Web
browser.
Enable JavaScript via your Web browser’s configuration options.
At installation, LAN
LED does not light.
Wrong cable used to
connect your computer to
the LAN Modem’s LAN port.
Make sure you are using the 8-pin to 8-pin cable labeled
Ethernet
which was provided with your 56K
LAN Modem. If you are using another 10BASE-T Ethernet (Category 5) cable, it must be a straight-
through cable.
At installation, ALERT
LED remains lit.
An internal failure.
Notify your reseller or technical support that the 56K LAN Modem has failed the self-test.
At installation, ALERT
LED continues to flash.
Self-test failure, or the LAN
Modem is in firmware
download mode
Power cycle the 56K LAN Modem. If the ALERT LED continues to flash, the 56K 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.
No dial tone when
handset of a phone
attached to the LAN
Modem is lifted.
The telephone line cable,
power cable and/or phone
cable may not be firmly
connected.
Check all cables and connectors to ensure that they are inserted securely.
Telephone cable may not be
in the correct port.
Ensure that the incoming analog telephone line has been connected to the port labeled
LINE
on the
56K LAN Modem’s back panel.
A data call may be in
progress.
Disconnect any data calls currently in progress.
3Com Corporation,
5400 Bayfront Plaza, Santa Clara, California, 95052-8145
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