pfs/Async supports Hayes-compatible modems. In many cases, your modem appears on a predefined list used during setup that provides a number of parameters needed to control your modem. If your modem does not appear, you can define a new modem to pfs/Async with its own setup parameters.
pfs/Async does not work with all modems. In particular, software modems, sometimes called winmodems, do not work with pfs/Async. Also, some internal hardware modems have wider variations than external hardware modems, and may not work, even if advertised as Hayes-compatible.
Access the pfs/Async Modem Settings window by displaying the Setup menu and selecting the Modem option. On the pfs/Async Modem Settings window, specify the Make and Model of your modem by highlighting the modem Make and then highlighting the modem Model from the list on the right. This allows pfs/Async to use the correct modem-dependent setup strings, answer commands, etc. The Comm Port you selected and defined previously displays in the small text box at the bottom of the window and cannot be changed on this window.
In addition to selecting the correct modem, you can make selections from the Utilities menu on the pfs/Async Modem Settings window. From the Utilities menu, you can add a new modem, delete an existing modem, or edit the settings for a modem. There is also an option called Pack Database that allows you to restructure the modem.dat file that contains a list of modems and their settings.