The USRobotics 56K Performance Pro Modem is controller-based for superior performance - with powerful communication processing functions built right into the modem itself. Quick Connect reduces your connection time to get you online quicker, and V.PCM Upstream provides 50% greater upload speeds - perfect for sending e-mail messages with large attachments. Internet Call Notification lets you screen incoming voice calls while online, so you won't miss the important ones, and Modem on Hold allows you to answer calls without losing your Internet connection - no second phone line is needed!