The Zoom/Modem V.92 External Model 3049 is a high performance 56K fax modem that plugs into the serial port of a computer using Windows, Macintosh, LINUX or UNIX operating systems(Window 8 or later OS’s use the Windows built-in Standard 56K driver). It also works with any device that can provide RS-232 signaling for Transmit, Receive, Ground. The 3049 is ideal for use with point-of-sale devices and dumb terminals which do not provide DTE signaling. Robust power handling features including protection against brownouts and power glitches make this modem suitable for unattended remote applications.