USRobotics 56K V.92 Faxmodem USB ( 5633B ) USB 1.1 offers simple Plug & Play. The faxmodem is hot-swappable & bus-powered (100 mA consumption) so it doesn't require a power supply. Internet Call Notification (ICN) monitors online activity and lets you choose to accept or reject incoming calls using Modem on Hold Instant Update software allows automatic download of updates to your PC; ControlCenter software allows you to configure V.PCM speeds Compatible with Windows Vista, Vista 64, XP, XP 64, 2000 (2k), ME, 98SE; 4 LEDs: Receive Data (RD), Transmit Data (TD), Carrier Detect (CD), Power (PWR) Supports: V.92 (V.PCM-Upstream, Quick Connect, Modem On Hold), V.90, V.34, V.32bis, V.32, V.22bis, V.22, V.23, and V.21; V.42/V42bis and MNP2-4/5; EIA 578 (Class 1) w/ V.17, V.29, V.27ter