This is the driver for U.S. Robotics Sportster internal 56K modem, Windows 95. Works on both 95a and 95b. I didn't get it to work with my computer. It's a Dell with intel pentium 2 266Mhz CPU. It says that the modem is properly installed on COM2 but it's just making this buzzing sound. The computer is communicating with the modem but when I'm dialling it just tells me that the modem is allready in use or isn't installed. If someone knows what to do, tell me.