The Sportster External 33.6 Faxmodem is designed for people that need excellent reliability and consistent performance for legacy dial-up connectivity. All of the features needed to eliminate the challenges associated with making solid analog connections, like simple Plug and Play installation, powerful controller-based processing, support for all major operating systems, and more are also built in. No other modem brand offers the combination of feature-rich performance, value, and reliability of USRobotics.