The QXCOMM SoftK56 Data Fax Voice is a type of modem device that was commonly used in computers for dial-up internet connections, faxing, and voice communication over the phone line. This modem uses a software-based approach (as opposed to a hardware modem) for its operation, which is why it is referred to as a SoftK56 modem. The K56 indicates that it is a 56kbps modem, which was the maximum speed for dial-up connections before broadband became widespread.

To use this modem with a Windows-based computer, you'll need the correct Windows driver. The driver enables the operating system to communicate with the modem hardware and provides functionality for data (internet), faxing, and voice features.