I have a Passive Digi Adapter and cannot establish a connection with Dialup Networking and Windows 9x, because WAN Mini-Port is not available when using any of the following: DataFire Micro, DataFire Pico, or DataFire Columbus Card.

Solution:

1. Check the TELEPHON.INI file, in the Windows Directory, to see if there is a double entry for WAN.TSP 
   (one with and one without a complete path):

   Bad Telephon.ini:
   [Providers]
   NumProviders=4
   NextProviderID=5
   ProviderID0=1
   ProviderFilename0=unimdm.tsp
   ProviderFilename1=tspvccm.dll
   ProviderID1=2
   ProviderID2=3
   ProviderFilename2=c:\windows\system\wan.tsp
   ProviderID3=4
   ProviderFilename3=WAN.TSP
   
   Correct Telephon.ini:
   [Providers]
   NumProviders=3
   NextProviderID=4
   ProviderID0=1
   ProviderFilename0=unimdm.tsp
   ProviderFilename1=tspvccm.dll
   ProviderID1=2
   ProviderID2=3
   ProviderFilename2=c:\windows\system\wan.tsp
   NOTE: The last two lines are obsolete.

If this doesn't resolve the problem, you may have a corrupt installation of the Microsoft ISDN Accelerator Pack.  Try reinstalling it.  Remove the Microsoft ISDN Accelerator Pack V1.1 via the CONTROL PANEL> SOFTWARE> WINDOWS> SETUP> CONNECTIONS> and install it again using the CD after restarting the system.

For Example: 
:/card/disk3/MSISDN11.EXE or
:/card/win95/colum30/disk3/MSISDN11.EXE or 
a:/english/MSISDN11.EXE

If you copy files from the Win95 CD-ROM, it will ask you if the file NDIS.VXD should be kept (default is = YES). 
NOTE: It is important that the file be kept.

1. In case you are using the Dial-Up network V 1.2 or Windows 98, check the driver release of the ISDN card, because the WAN miniport is only suitable for the Dial-Up network V1.2 from version 2.30(A) onward.