The Conexant RD01-D850 56 Mbps Modem from Dell Inspiron Desktop is a high-performance modem card with external interfaces for DSL/Phone and Ethernet/Network cards. It features a maximum downstream data rate of 56 Mbps and utilizes V.92 and V.90 56k technology for reliable connectivity. With error correction capabilities and data compression features, this internal modem card offers fast and efficient data transfer for various networking needs. Built by Conexant, a trusted brand in computer components, the RD01-D850 modem is a reliable choice for enhancing your desktop's connectivity options.