3Com 3C892 manual Symptom Possible Cause Solution

Evaluating Symptoms and Solutions 95

Table 6 Symptoms, Causes, and Solutions

Symptom Possible Cause Solution

The LAN Modem seems to be placing calls inadvertently.

Although multiple service providers are configured, all calls are going to the same service provider which is a private network.

ISDN LAN Modem has assigned all available IP addresses.

NetBIOS is making DNS requests causing the LAN Modem to initiate a call.

You may not have configured the IP address and the subnet mask in the Private Network Parameters window.

From another computer attached to the ISDN LAN Modem, go to the LAN Modem’s main configuration page. Click Workstations. Select the name of computer you removed and then click Select. Click Release Workstation Entry. Reboot the workstation. The newly- added workstation can now be assigned an IP address.

If you cannot release a workstation entry, connect a telephone to one of the ISDN LAN Modem’s phone ports and press **3265# from the keypad to release the last IP address assigned by the LAN Modem.

Enable NetBIOS filtering. From the ISDN LAN Modem’s home page, click LAN Parameters. Check the box labeled Enable NetBIOS filtering.

From the ISDN LAN Modem’s home page, click Service Providers and then select the private network profile you already configured. Enter the IP address and the subnet mask for the private network.

Clicking Submit in the LAN Modem’s configuration pages 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.

The Windows 95 “Connect To” window opens upon launching a Web browser.

Calls cannot be placed from analog equipment

Networking is setup for use with a serial port modem.

If you cannot place calls, there may be a problem with the configuration of your ISDN line.

Calls from the analog port may be blocked.

To bypass the “Connect To” window:

1Double-click the Internet icon in the control panel.

2Clear the check box labeled “Connect to the Internet as needed.”

3Click OK.

This allows all outgoing connections to run directly through your ISDN LAN Modem.

Call the telephone company and have them verify your telephone number(s) and SPID(s) and that your line is configured for circuit-switched voice and data service.

From the Call Routing window, check the Phone Port 1 and Phone Port 2 boxes which are used for voice call routing. Make sure that the correct Phone Port box for that port is checked.

When the handset of a telephone attached to the ISDN LAN Modem is lifted, a dial tone cannot be heard.

There may be two active calls to different locations thus using both B channels and leaving no bandwidth for the voice call.

Bandwidth allocation for this service provider may be set to Always use 2 B channels and a call is currently up.

The ISDN line cable, power cable and/or phone cable may not be firmly connected.

If you cannot place calls, there may be a problem with the configuration of your ISDN line.

If there are two independent data calls connected, go to Manual calling to disconnect one of the active calls.

Either go to Manual calling and disconnect the current call or go to service providers and change bandwidth allocation to either Add second B channel as required or Use one B channel.

Check all cables and connectors to ensure that they are inserted securely.

Call the telephone company and have them verify your telephone number(s) and SPID(s) and that your line is configured for circuit-switched voice and data service.

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