The AOpen FM56-USB2 Modem is an external USB modem, typically used for dial-up internet access or faxing, with a maximum speed of 56 Kbps (hence the "56" in the name). It is a USB-based modem, meaning it connects to your computer via a USB port rather than the traditional serial or parallel ports used by older modems.
To use the AOpen FM56-USB2 Modem with a Windows computer, you need the correct Windows driver. The driver enables your computer to recognize and communicate with the modem, allowing you to connect to the internet or send/receive faxes.