Model: V1433VQH-U DM336p: V.34 Integrated Data/Fax/Voice
Operating System: Windows 95 & Windows 98 (Note: might work with other versions of this os.)
This is a very detailed page that includes descriptions, features, data sheet,application circuits, ect...
Just scroll to bottom of the page and click the "DRIVER" link under "download". hope this helps.