Some UART Chips Do Not Support 14400 Baud (112215)


The information in this article applies to:

  • Microsoft Windows NT Server 3.1
  • Microsoft Windows NT Workstation 3.1
  • Microsoft Windows NT Advanced Server 3.1
This article was previously published under Q112215

SUMMARY

UART chips 8250, 16450, and 16550 do not support 14400 baud rates.

If you attempt to use the Windows Terminal applet with a modem that uses a 8250, 16450, or 16550 UART chip, the following error message appears if you attempt to set the baud rate to 14400:
The selected COM port is either not supported or is being used by another device.

Select another port.
Modification Type:MajorLast Reviewed:11/20/2003
Keywords:kbHardware KB112215
©2003 Microsoft Corporation. All rights reserved.