The Conexant D480 MDC V9x Modem is a hardware device that allows computers to connect to the internet or communicate with other systems via traditional telephone lines, typically using dial-up connections. This modem, manufactured by Conexant, is capable of supporting speeds up to 56 kbps, which was common for dial-up internet connections in the past.

The Conexant D480 MDC V9x Modem Windows Driver is software that enables your computer's operating system (Windows) to properly communicate with and control the modem. This driver ensures that your system can send and receive data through the modem, establish connections, and make use of the features provided by the device (e.g., dial-up networking, faxing, etc.).