... V9.2/K56Flex 5,600bps Transmission Protocol Product description56K USB Modem, offers universal Plug-and-play USB interface and supports hot ... ), V.34 (33.6Kbps) protocol standardsFeaturesComply with external USB 56K Modem, supports hot plug and can be used by laptops and ... /K56Flex 5600bps transmission protocol DCE speed rate is up to 56,000bps and DTC speed rate is up to 115,200bps ...