Dialectic is meant to be used as a dialer in conjunction with an external telephone. Most modems (especially the ones that ship with Apple computers and the Apple external USB modem) do not support voice communications and, as such, Dialectic cannot overcome this limitation. If you wish to use your Mac as a telephone, you should look into the various softphone clients that allow you to use your Mac’s microphone & speakers to place phone calls over the Internet (this requires the use of a third-party VoIP service which may charge for calls). Dialectic can be configured to dial using many popular softphones.
