What are you using for the USR modem in the way of a COM port? Are you using the motherboard's native ports or some sort of USB adapter? Of course you'll need to make sure that the serial cable is proper for modems. You'll want to look in device manager to see if the external modem is recognized. I'm fairly certain XP already has a compatible driver but not positive. If it's not recognized, you'll need to add the new hardware yourself. If it's recognized but not configured do to a resources conflict, you need to sort that out. Of course, if connected to a motherboard serial port, make sure that port is enabled in the BIOS. Good luck.
I have a dell widow xp with a conexant hda d330 mdc v.92 modeum in my laptop and can not connect to a us rebotics sporster external fax modeum 33.6 .. My last laptop connect to the us robtics so its something with the mda modeum or settings. I tryed changing the settings around but nothing has worked... ZAThanks for a reply