InLine 30050I, 56 Kbit/s, USB, 48/56Kbps, 56Kbps, V.44/V.42/MNP5, Windows 2000/XP/Vista/7 InLine 30050I. Modem speed: 56 Kbit/s, Interface: USB. Supported data transfer rates: 48/56Kbps, Maximum fax transfer rate: 56Kbps, Data compression: V.44/V.42/MNP5. Minimum system requirements: Windows 2000/XP/Vista/7