<ul><li>This is the USRobotics Courier V.Everything V92/V90/etc External "Mission Critical" Modem, considered hands down the best modem available</li><li>Features 56Kbps RS-232 (Serial Port) ITU V.92/V.90 up to 56 Kbps downloads Data: V.92, V.90, V.34, V.32bis, V.32, V.22bis, V.22, V.23, and V.21 ITU V.34 at 33.6 Kbps or 28.8 Kbps V.32 at 19.2 Kbps.</li><li>Includes USR3453C modem, power supply, serial cable, phone cable, Installation and Documentation CD, Quick Start Guide.</li></ul><br><br>The best modem, hands down. U.S. Robotics USR3453C External V.Everything Courier Global Business Modem 56Kbps RS-232 (Serial Port) ITU V.92/V.90 up to 56 Kbps downloads Data: V.92, V.90, V.34, V.32bis, V.32, V.22bis, V.22, V.23, and V.21 ITU V.34 at 33.6 Kbps or 28.8 Kbps V.32 at 19.2 Kbps. Includes USR3453C modem, power supply, serial cable, phone cable, Installation and Documentation CD, Quick Start Guide.

US Robotics USR courier 56k v90 v92 external business fax/modem rs-232 rohs USR3453C