The SoftK56 DataFax ICH Modem Windows driver is a software package designed for K56 data/fax modems based on the Intel ICH (Integrated Controller Hub) chipset. These modems were commonly used in the late 1990s and early 2000s for dial-up internet connectivity and sending/receiving faxes. The driver allows the operating system (Windows) to communicate properly with the modem hardware, enabling its full functionality.

The SoftK56 modem driver supports K56flex, a type of modem protocol, and allows the modem to connect to the internet over dial-up lines, use fax software, and perform other related functions.