DOCUMENT:Q221331
TITLE   :RRAS Computer Stops Responding to Incoming Calls Under Stress
PRODUCT :Windows NT
PROD/VER:4.0
OPER/SYS:WINDOWS NT
KEYWORD :kbbug4.00 kbfix4.00 

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The information in this article applies to:

 - Microsoft Windows NT Server version 4.0 
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SYMPTOMS
========

The Routing and Remote Access Server (RRAS) computer may stop responding to
incoming calls after a while.

CAUSE
=====

This problem is caused by an insufficient buffer size problem in Kmddsp.tsp.

RESOLUTION
==========

A supported fix that corrects this problem is now available from Microsoft, but
it has not been fully regression tested and should be applied only to systems
experiencing this specific problem. If you are not severely affected by this
specific problem, Microsoft recommends that you wait for the next Windows NT 4.0
Service Pack that contains this fix.

To resolve this problem immediately, contact Microsoft Product Support Services
to obtain the fix. For a complete list of Microsoft Product Support Services
phone numbers and information on support costs, please go to the following
address on the World Wide Web:

   http://support.microsoft.com/support/supportnet/default.asp

This hotfix has been posted to the following Internet location as Discfixi.exe
(x86) and Discfixa.exe (Alpha):

   ftp://ftp.microsoft.com/bussys/winnt/winnt-public/fixes/usa/NT40/
   hotfixes-postSP4/Disc-fix/

NOTE: If this product was already installed on your computer when you purchased
it from the Original Equipment Manufacturer (OEM) and you need this fix, please
call the Pay Per Incident number listed on the above Web site. If you contact
Microsoft to obtain this fix, a fee may be charged. This fee is refundable if it
is determined that you only require the fix you requested. However, this fee is
non-refundable if you request additional technical support, if your no-charge
technical support period has expired, or if you are not eligible for standard
no-charge technical support.

For more information about eligibility for no-charge technical support, see the
following article in the Microsoft Knowledge Base:

   Q154871 Determining If You Are Eligible for No-Charge Technical Support

STATUS
======

Microsoft has confirmed this to be a problem in Windows NT 4.0.

Additional query words: 4.00
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