When you choose "Other" in the interface box, we have no way to know if your modem is internal or external. Judging from the "U" in the model, I'm assuming your modem has USB interface.
http://members.driverguide.com/drive...driverid=57024
Found several matching models here:
http://www.acorp.com.tw/product1.php?Id=18
(just click the matching model for drivers)