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# Some UART Chips Do Not Support 14400 Baud

Article ID: 112215

Article Last Modified on 10/31/2006

APPLIES TO

- Microsoft Windows NT Advanced 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.

Additional query words: prodnt err msg

Keywords: kbhardware KB112215