The Zoom/FaxModem 56K PCI Plus Model 2920 is Zoom's best internal fax modem. It plugs into any unused PCI slot in a Windows or Linux-based desktop computer. Use of the fast PCI bus interface helps maximize performance. The Zoom/FaxModem 56K PCI Plus Model 2920's performance is further enhanced by its on-board controller and DSP (Digital Signal Processor). Uses high-speed PCI bus. On-board DSP for high performance. On-board Controller for extra gaming and multimedia power. Supports both V.90 and K56flex for up to 56,000 bps data downloads. 14,400 bps Class 1 fax. Software upgradeable, call waiting feature. ZoomGuard lightning protection. V.80, H.323, and H.324 compliant (videophone ready)