The Ambient CLM Data Fax Voice Windows driver is typically a software package that allows a computer to communicate with a modem or other communication device that supports data, fax, and voice functions. This driver is part of the supporting software needed for devices that offer a combination of voice communication (like phone calls), faxing, and data transfer via a telephone line.

Here's a breakdown of what each function refers to:

1. Data: The modem can transmit data over a phone line, typically for internet connections.
2. Fax: The modem can send and receive fax documents.
3. Voice: The modem can be used for voice calls, allowing it to function as a phone line interface.

The "Ambient CLM" portion may refer to a specific manufacturer or chipset used for the modem (Ambient is a company that has historically produced communication hardware). The driver package allows the modem to interact with the Windows operating system.