Conceptronic 56 KBPS V.92 CONTROLLER BA, 56 Kbit/s, ITU V.90/V.92, DOS, Windows 3.1x/95/98/ME/NT 4.0/2000/XP and Linux. Conceptronic 56 KBPS V.92 CONTROLLER BA. Modem speed: 56 Kbit/s. Data link protocols: ITU V.90/V.92. Compatible operating systems: DOS, Windows 3.1x/95/98/ME/NT 4.0/2000/XP and Linux.