USRobotics 5635 56K USB Mini Faxmodem Data: V.92, V.90, V.34, V.32bis, V.32, V.22bis, V.22, V.23, and V.21 Fax: EIA 578 (Class 1) with V.17, V.29, V.27ter, Group 3 DTE interface: USB Version 1. USB powered, consumption: 100 ma Minimum System Requirements.Windows 2000/XP. Intel Pentium III 600 MHz or equivalent, 128 MB RAM, 5 MB hard drive space. USB port. 2x or better CD-ROM drive. Analogue phone line.