DOCUMENT:Q179187
TITLE   :Problems Using TAPI 2.1
PRODUCT :Microsoft Windows NT
PROD/VER:4.00
OPER/SYS:WINDOWS
KEYWORDS:kbbug4.00 kbfix4.00 kbfile kbbug kbpatch NTSrvWkst nttcp

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The information in this article applies to:

 - Microsoft Windows NT Workstation version 4.0
 - Microsoft Windows NT Server version 4.0
 - Microsoft Windows NT Server Enterprise Edition version 4.0
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SYMPTOMS
========

You may experience one or more of the following problems while using TAPI
2.1:

 - The data an application provides for lineSetCallData is lost when Remote
   TSP is used.

 - TAPISRV becomes unresponsive and CPU utilization peaks at 100%.

 - TAPISRV cannot be started when RAS or another Windows NT Service starts
   TAPI.

 - TAPISRV causes an Access Violation error message when calling Agent
   functions such as lineAgentSpecific and lineGetAgentActivityList.

RESOLUTION
==========

To resolve this problem, obtain the following fix or wait for the next
Windows NT service pack.

This fix should have the following time stamp:

   01/05/98  06:09p               140,560 Tapisrv.exe (Intel)
   01/05/98  06:52p               220,944 Tapisrv.exe (Alpha)

NOTE: This hotfix requires TAPI 2.1. Applying this hotfix with a previous
version of TAPI may cause unpredictable behavior.

This hotfix has been posted to the following Internet location:

   ftp://ftp.microsoft.com/bussys/winnt/winnt-public/fixes/usa/NT40/
   hotfixes-postSP3/tapi21-fix/

NOTE: The above link is one path; it has been wrapped for readability.

STATUS
======

Microsoft has confirmed this to be a problem in Windows NT version 4.0.
A supported fix is now available, but has not been fully regression-tested
and should be applied only to systems experiencing this specific problem.
Unless you are severely impacted by this specific problem, Microsoft
recommends that you wait for the next Service Pack that contains this fix.
Contact Microsoft Technical Support for more information.

MORE INFORMATION
================

Windows NT 4.0 Service Pack 3 includes TAPI 2.0.

Additional query words: 4.00

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