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

• Microsoft Windows 95

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
   

MORE INFORMATION

Windows Telephony application programming interface (TAPI) is the API that allows your computer to manage your telephone system (data, fax, and voice).