Model: CreditCard Modem 56T (CM56T)
Operating System: Windows 95 & Windows 98 (Note: might work with other versions of this os.)
Windows 95/98/ NT
"Models covered CM56T
Does NOT Support CM28, CM33, CM33, CM56, CM56G
This self-extracting archive file contains a 32 bit firmware flash upgrade utility intended for use on computers running Windows 95/98, and NT.
Xircom recommends using the most current firmware for your products."