I am helping a friend. We built her a new system which operated under Windows Titan - a NT O/S think. The modem worked fine. Sorry, I don't know the make but it is internal, not external.
We have now changed the O/S to Windows XP Professional SP2 but I can't find the modem! I've tried 'Add new hardware' and tried installing a standard modem but this does not work. Device manager does not show any confilcts. Apart from the change of O/S, there have been no other changes to the system. I suppose it is possible that the modem installed has completely failed but is there anything else that I can try to find the modem.