The Conexant USB D400 V92 Modem is a USB-based external dial-up modem that allows you to connect to the internet via a telephone line. The modem uses V.92 technology, which supports faster connection speeds for dial-up internet services, along with features like faster upload speeds and the ability to pause or resume your internet connection without disconnecting.

The Conexant USB D400 V92 Modem Windows driver is the software that allows your computer to communicate with this modem, enabling it to send and receive data over the telephone line. Without the correct driver, the modem will not function properly on your Windows system.