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Device contention when trying to use a modem

Occasionally, when trying to use your modem, you might get the following errors: Another program is using the selected Telephony device. Try again after the other program completes, or Cannot initialize port.

The state of Windows 95 device contention is determined by the value for the "COM n AutoAssign=x" setting in the [386Enh] section of the System.ini file, where n is the number of the serial port and x is a value from -1 to 1000.

The default setting in Windows 95 is -1. This setting causes Windows 95 to not release a serial port previously used by a non-Windows-based program.

If you need hot-swapping capability between a DOS-based communications program and a Windows-based communication program, add the following entry to the [386Enh] section of the System.ini file:

Com n AutoAssign=0

Contributed by C. Ramesh

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