Model: Winmodem 56k
Operating System: Windows 95 & Windows 98 (Note: might work with other versions of this os.)
Before downloading: Run Free Scan for Instant Driver Updates
3Com Winmodem 56k Driver. I posted the same driver under USRobotics, reposting here in case you're looking for it under 3Com. It includes the 1807Wm9x.cat some people needed.