KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q130542: PCMCIA Modem Fails When Set to Windows NT Default

Article: Q130542
Product(s): Microsoft Windows NT
Version(s): 
Operating System(s): 
Keyword(s): 
Last Modified: 08-AUG-2001

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft Windows NT Workstation versions 3.51, 4.0 
- Microsoft Windows NT Server versions 3.51, 4.0 
-------------------------------------------------------------------------------

SYMPTOMS
========

When you install or upgrade to Windows NT 3.51 or NT 4.0, some PCMCIA modems or
fax-modems may not function properly with the Windows NT default base I/O port
address and interrupt request (IRQ) line settings.

CAUSE
=====

Default serial port settings are not updated properly from the information that
is compiled with NTDETECT during the boot sequence. PCMCIA modems act as serial
devices, thus they are not configured properly and may not function properly
when used by an application such as Terminal.

WORKAROUND
==========

To work around this problem:

1. Run Control Panel, choose Ports.

2. Select the communication port (COMx) that the PCMCIA modem or fax-modem is
  connected to and choose Settings.

3. In the Settings For COMx dialog box (where x is the communication port
  number), choose Advanced.

4. For the Base I/O Port Address, select the appropriate address for the COM
  port. For example, select 02F8 for COM2.

5. For the IRQ, select the appropriate IRQ for the COM port. For example, select
  3 for COM2.


STATUS
======

Microsoft has confirmed this to be a problem in Windows NT version 3.51 And 4.0.
We are researching this problem and will post new information here in the
Microsoft Knowledge Base as it becomes available.


Additional query words: prodnt pcmcia modem com serial ntrmt

======================================================================
Keywords          :  
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT351search kbWinNT400search kbWinNTW351search kbWinNTW351 kbWinNTSsearch kbWinNTS400search kbWinNTS400 kbWinNTS351 kbWinNTS351search

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.