KB148742 - Troubleshooting the ISDN Accelerator Pack

Article ID: 148742

Article Last Modified on 11/15/2006

Microsoft Windows 95

This article was previously published under Q148742

SUMMARY

This article lists tips for troubleshooting connection problems using the ISDN Accelerator Pack for Internet Explorer 2.0.

MORE INFORMATION

The ISDN Accelerator Pack for Internet Explorer 2.0 supports the following ISDN adapters:

   Manufacturer         Model
   --------------------------------------------------
   Digi                 Datafire U
                        Datafire S/T
                        Datafire4
                        PCIMAC
                        PCIMAC4
   Eicon Technologies   G. Diehl PCMCIA adapter
                        G. Diehl ISA internal adapter
   Elmic Systems        Surf-2-Surf
   U.S. Robotics        Sportster 128k ISDN internal
                        adapter

If your ISDN adapter is not listed and is an internal adapter, contact the adapter's manufacturer for assistance.

For additional information about external adapters, please see the following article in the Microsoft Knowledge Base:

140123 Using ISDN Terminal Adapters in Windows 95

If you are having difficulty connecting to another computer using the ISDN Accelerator Pack for Internet Explorer 2.0, perform the following steps to troubleshoot the problem:

Verify that an ISDN adapter is installed correctly in Windows 95 and that it is a supported device by following these steps:
1. In Control Panel, double-click Network. On the Configuration tab, verify that your ISDN adapter is in the list of installed network components. If your ISDN adapter is not in the list of installed components, install it using the manufacturer's instructions.
2. Click your ISDN adapter, and then click Properties.
3. On the Resources tab, verify the settings for the adapter (such as IRQ and I/O address settings). These settings should match the physical settings on the adapter.
  
  If you are unable to determine the physical settings on your ISDN adapter, contact the manufacturer for assistance.
Install Dial-Up Networking if you have not done so already. For information about installing Dial-Up Networking, please consult your Windows 95 documentation, or search for "Dial-Up Networking" in Windows 95 Help.
Verify that the correct network protocols have been installed and configured appropriately. To do so, follow these steps:
1. In Control Panel, double-click Network.
2. Verify that the following components have been installed:
  - Client for Microsoft Networks
  - Dial-Up Adapter
  - Your ISDN device
  - NDISwan
  - TCP/IP, IPX, or NetBEUI protocol
Verify that the ISDN adapter driver is not set to transfer data above the rate of 64K per second. For example, Digi ISDN adapters may be configured to transfer data at rates faster than 64K per second by using Digiboard bonding. This is not a supported configuration. If your driver is configured to transfer data at rates above 64K, disable this feature for testing.

For information about disabling Digiboard bonding on Digi ISDN adapters, please see the following article in the Microsoft Knowledge Base:
148179 Digi ISDN Adapter Stops Working During 128K Connection
If you do not have a Digi ISDN adapter and your ISDN adapter driver is configured to transfer data at rates faster than 64K per second, contact the manufacturer of your IDSN adapter for instructions on disabling this feature.
If you need to dial a number for an outside line before making a connection, add the number by clicking Dialing Properties in the connectoid and filling in the "To access an outside line, dial" box with the appropriate number.

NOTE: If you have a modem installed, you should add a comma (,) after the number you use to access an outside line. If you do not include a comma, your modem may not dial correctly. ISDN devices ignore the comma.
Verify that the correct service profile identifier (SPID) has been entered in the ISDN Accelerator Pack settings. To do so, compare the SPID entered in the ISDN Accelerator Pack settings with the SPID provided by your telephone company.

NOTE: If your telephone company has provided a voice SPID and a data SPID, the data SPID should be entered in the Channel 1 field. Some telephone companies may require that you enter only one data SPID. If the SPIDs are voice and data (which is more common), they can be entered in any order.

If you do not have your full SPID in writing from your telephone company, contact them to verify it.

For additional information about checking or changing SPIDs, please see the following article in the Microsoft Knowledge Base:
149718 How to Change SPIDs in Windows 95
After making a connection, verify that the connection to the ISDN line is correct for the interface type of your ISDN adapter (these types are S/T or U). To verify which type of interface your ISDN adapter uses, refer to the adapter's documentation or contact the manufacturer.

ISDN adapters using an S/T interface must be connected to an NT1 device and then to the ISDN line. If you are connecting to an NT1 device, verify that the NT1 device has power and that no error lights are active.

If the Terminal Error light is on, the card cannot synchronize with the telephone digital service. This is usually caused by bad SPIDs, an improperly seated ISDN adapter card, or the computer that the adapter is installed in not being powered on. To troubleshoot the Terminal Error light, verify the SPIDs and then remove and reinsert the ISDN adapter.

If the Line Error light is on, the line is not functioning correctly. Contact your telephone company to verify that your ISDN line is working.

ISDN adapters using a U interface cannot use an NT1 device and must be connected directly to the ISDN interface supplied by the telephone company.
If the connection is being dropped or is not established at all, try changing the protocols or checking the type of server to which you are connecting. For more information about the connection, create a Ppplog.txt file by viewing the properties of the Dial-Up Adapter in Network properties and clicking Yes in the Record A Log File box on the Advanced tab.

Also, attempt to connect to more than one ISDN server to rule out a server that is not functioning as the cause.
Remove the ISDN adapter and all ISDN files from the computer and then reinstall them according to the manufacturer's instructions.

Keywords: KB148742