The table below lists symptoms of common problems, possible causes, and possible solutions. For additional troubleshooting information, refer to the User Guide located on the 3Com Companion Programs CD-ROM. For FAQs and other technical notes, refer to the LAN Modem web site at: http://www.3com.com/support/docs/lanmodem/
Symptom | Possible Cause | Solution |
| | | |
Web browser does not | Web browser needs the IP | 1 | Enter the following URL in your Web browser: http://3com.oc.lanmodem. Alter- |
start (the welcome | address of the LAN Modem; | | natively, you can enter http://192.168.1.1. |
message does not | or the browser is not set to a | |
| |
appear). | default start page | | |
| Incompatible IP address on | 2 | Run the EZ-LAN Wizard, or refer to Chapter 3 of the User Guide. |
| your computer. | | |
| | 3 | Reset the IP address on your computer, as follows: |
Windows 95 and 98: Run winipcfg.exe. Select the Ethernet adapter connected to the Dual 56K LAN Modem. Click Release All and then Renew All.
Windows NT 4.0/2000: Run ipconfig /release and then ipconfig /renew.
Web browser may be configured to use a proxy server.
There is a configuration problem.
At installation, LAN LED | Wrong cable used to connect |
does not light up. | your computer to the LAN |
| Modem’s LAN port. |
At installation, ALERT | An internal failure. |
LED remains lit. | |
Macintosh: From Apple menu, select Control Panels; then TCP/IP. In the Connect via field, make sure Ethernet is selected. In the Configure field, select Using Bootp Server to clear the fields. Close and save changes. Re-open the TCP/IP control panel, and select Using DHCP Server. The fields should now read <will be supplied by server>. Select File, then Close, saving changes.
Set the browser to use the LAN Modem, as follows:
Internet Explorer: From the View menu, choose Internet Options. Click the Connection tab. Uncheck the box labeled Connect using Proxy server.
Netscape: From the Edit menu, choose Preferences. Under Advanced, choose Proxies. Check the box labeled Direct Connection to the Internet.
Reset the Dual 56K LAN Modem to the factory default setting as follows:
Press and release the reset button located on the back of the unit. The Alert LED will begin to flash. While the LED is still flashing, 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.
Make sure you are using the RJ-45 to RJ-45 cable labeled Ethernet which was provided with your Dual 56K 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 Dual 56K LAN Modem has failed the self-test.
At installation, ALERT LED continues to flash.
No dial tone when handset of a phone attached to unit is lifted.
Cannot place test call to the Internet
Self-test failure, or LAN Modem is in firmware download mode
Telephone line cables, power cable, and/or phone cables may not be firmly connected.
Telephone line cables may not be in the correct ports.
Data call may be in progress.
ISP not properly configured.
Phone line not connected.
Power-cycle the Dual 56K LAN Modem. If the ALERT LED continues to flash, the Dual 56K LAN Modem has failed the self-test. Contact your reseller or technical support. If the ALERT LED is not flashing, then the LAN Modem is now operating correctly.
Check all cables and connectors to ensure that they are inserted securely.
Ensure that the incoming analog telephone line cables have been connected to the ports labeled LINE 1 and LINE 2 on the Dual 56K LAN Modem’s back panel. If using a single analog line, connect to Line 1.
Disconnect any data calls currently in progress.
Confirm your ISP connection settings, such as Username, Password, and telephone number. Follow steps 7-11 on page 4.
Check all cables and make sure that telephone line is connected to the Line 1 port.
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