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Windows Server 2008 Serial Modem

Last Modified: 2013-12-27
We have a modem attached to serial port on server running Windows 2008 the modem stopped working.  We have uninstalled the modem and have gotton a new one.  Windows does not reconize anything on that serial port now.  Is there a AT command or something that will release what I think is a port reservation causing that port to be locked down.  I have gone through registry and can find nothing for serial port other than standard windows settings.

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