The Zoom/ Modem V.92 EXT plugs into the serial port of any computer, including computers running Windows, Macintosh OS, Linux & Unix. It also works with any device that can provide RS-232 signaling for Transmit, Receive, Ground. The 3049 is ideal to be used with point-of-sale devices & dumb terminals which do not provide DTE signaling. Robust power handling features including protection against brownouts & power glitches make this modem suitable for unattended remote applications. The Model 304 9 is fully compatible with all features of the latest V.92/V.44 international standards & will also communicate at V.90 & slower speeds. Please note: networking components such as switches, routers, UPS & wireless devices require that speeds & standards be consistent throughout the network to gain optimum performance. To avoid compatibility clashes or for advice, please contact us on solutions@ebuyer.com.