Works well on most model PC's IBM, AST Clones. Works with the Rexon Inc. Megaphone card as well as most other MDSP2780 chip based cards. Read the install instructions prior to setup. Uses 28.8 modem speed even on the 14.4 Rexon card. This is a 3 disk install from floppy only. Unzip this file to 3 separate zip files, then unzip them to 3 floppy disks.