The Conexant 56K PCI Soft Modem is a modem that connects to a computer via a PCI slot and allows it to access the internet or send/receive faxes using a standard telephone line. The term "Soft Modem" refers to the fact that it relies on software to handle many of the functions that were traditionally handled by hardware in older modems. This reduces the amount of hardware required and allows for a lower-cost modem.

The Windows driver for the Conexant 56K PCI Soft Modem is the software that allows the operating system to communicate with the modem, enabling it to function correctly. Without the correct driver, the modem may not work properly or at all.