A fax modem (often called a dial-up fax modem) is a device that connects to your computer and telephone line. It can be used for data transmissions and for sending and receiving faxes. Fax Modems are available in easy to install USB type, internal (slot) that is installed inside the computer, and external powered models that plug into a serial port. In Microsoft Windows, go to Windows Control Panel and double-click the Phone & Modem settings. Click on the Modem tab to determine if a fax modem device is listed here. If you do not see any devices listed here then you do not have a fax modem installed on your computer. If a device is listed, verify if the model listed supports fax. FaxTalk will support many Class 1 and Class 2 type fax modems. If you are unsure, e-mail us with the name of the device listed and we will try to assist. NOTE: Cable and DSL modems that are supplied by your phone or cable company are not fax modems, and the fax built-in with some All-In-One printers are not considered fax modems so these cannot be used to send or receive faxes with the FaxTalk software.