Model: hayes 336 dfv-5657us
Operating System: Windows 98SE (Note: might work with other versions of this os.)
Before downloading: Run Free Scan for Instant Driver Updates
Im running win98se have not tested it on any other os thou.Would like your feed back.I used the second driver on the list.[zoltrix int sp phone v.34+ 33,600(fmvsp336i)].