3Com 3C892 manual Evaluating Symptoms, Symptoms, Causes, and Solutions Possible Cause

94CHAPTER 9: TROUBLESHOOTING AND MAINTENANCE

Evaluating Symptoms	Table 6 lists symptoms of common problems, possible causes, and possible
and Solutions	solutions.
Table 6 Symptoms, Causes, and Solutions
Symptom	Possible Cause	Solution

Upon initial setup, communication between the ISDN LAN Modem and my computer cannot be established.

Incompatible IP address on your computer.

Your Web browser needs the IP address of the ISDN LAN Modem.

Reset the IP address on your computer.

For Windows 98 and 95 users, run Winipcfg.exe. Select the Ethernet adapter connected to the ISDN LAN Modem. Click Release All and then click Renew All.

For Windows NT 4.0 and Windows 3.11 users, run ipconfig /release and ipconfig /renew.

For Mac users, from the Apple menu, select Control Panels and then select TCP/IP. Make sure Ethernet is selected in the Connect via field. From the Configure field, select Using BootP Server to clear the fields, then close and save changes to the Control Panel. Open the TCP/IP control panel and select Using DHCP Server. The fields should now read <will be supplied by server>. Select File and then Close and save changes when prompted.

Enter the following URL in your Web browser: http://192.168.1.1/mainpage or

http://3com.oc.lanmodem/

There is a configuration problem. 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.

The wrong cable may be connected to the LAN port on the ISDN LAN Modem and your PC.

Make sure you are using the 8-pin to 8-pin cable labeled Ethernet that 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.

Web browser may not be set to a default start page.

Enter a default URL from within your Web browser.

If you are using Internet Explorer, launch your Web browser. 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.

If you are using Netscape, launch your Web browser. 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.

Your Web browser may be configured to use a proxy server, instead of the LAN Modem.

Internet Explorer users: Launch your Web browser. 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 users: Launch your web browser. From the Edit menu, select Preferences. Double-click Advanced, and then click Proxies. Check the box labeled Direct Connection to the Internet.

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