TAPI Apps Can't Dial Unless UniModem Is First Listed Provider (124075)


The information in this article applies to:

  • Microsoft Windows 95
This article was previously published under Q124075

SYMPTOMS

HyperTerminal, the Microsoft Network, or another TAPI-enabled application does not dial.

CAUSE

This problem occurs when a pre-Windows 95 service provider appears in the TELEPHON.INI file and precedes the Windows 95 Universal Modem Driver (UNIMDM). A pre-Windows 95 service provider is one that was built to the Windows 3.1 TAPI, rather than the Windows 95 TAPI.

WORKAROUND

To work around this problem, perform the following steps:
  1. Open the TELEPHON.INI file that is in your Windows directory with a text editor (such as WordPad).
  2. The Providers section may appear as follows: 
          [Providers]
      NumProviders=2
      NextProviderID=3
      ProviderID0=1
      ProviderFilename0=ATSP.TSP
      ProviderID1=2
      ProviderFilename1=UNIMDM.TSP
    Change the above to: 
          [Providers]
      NumProviders=2
      NextProviderID=3
      ProviderID1=1
      ProviderFileName1=ATSP.TSP
      ProviderID0=2
      ProviderFileName0=UNIMDM.TSP
The above changes inform the TAPI.DLL file that UniModem is the first provider.

MORE INFORMATION

Windows Telephony application programming interface (TAPI) is the API that allows your computer to manage your telephone system (data, fax, and voice).
Modification Type:MajorLast Reviewed:12/17/2000
Keywords:KB124075
©2002 Microsoft Corporation. All rights reserved.