Certain PC Card Modems May not be Detected in Window NT 4.0

ID: Q159103

The information in this article applies to:

SYMPTOMS

Windows NT 4.0 may not detect certain PC Card modems installed in your computer although they are listed in the Control Panel Modems applet. This problem may occur with a variety of PC Card modems, including the ones listed below:

Compaq 144 Data Fax Modem Series 570
Compaq 288 Data Fax Modem Series 571
P.N.B. PCMCIA Rio V34


CAUSE

This problem is related to a timing issue in the PC Card modem detection code of Windows NT 4.0, and may vary from controller to controller and from modem to modem.


STATUS

Microsoft has confirmed this to be a problem in Windows NT version 4.0. This problem has been corrected in the latest U.S. Service Pack for Windows NT version 4.0. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Additional query words: pcmcia modem sp2 


Keywords          : kbsetup kbbug4.00 ntsetup NTSrvWkst 
Version           : WinNT:4.0
Platform          : winnt 
Issue type        : kbbug

Last Reviewed: January 30, 1999