Detailed Product Description Product Description56K USB Modem, offers UPnP USB interface and supports hot plug, lightning proof ... data compress protocol, V.92, V.90 (56Kbps), V.34 (33.6Kbps) protocol standards.Featuresl With External USB 56K Modem, adopts ST chips ... Supports Win9X/ME/2000/XP/VISTASpecificationl Communication protocol: ITU-TV.92 , V.90 , V.34 , V.32bis , V.32 , V.22bis ...