Can I use PhoneDeck to dial a number and talk using headphones and a microphone?
No. This is a modem-specific feature. Modems are not normally connected to the sound card, so you won’t be able to speak through the microphone or hear the other party through the speakers. You can only use the phone handset as you normally do. Some modems come with a headset and a microphone, which you connect to the modem itself, not the soundcard. This depends entirely on the particular brand of the modem you have, and PhoneDeck cannot do anything in this regard. You’ll hear sound from the modem’s internal beeper until you click the button in the dialer window (you can change the modem speaker volume in the Options dialog box, on the “Modem” tab). After that, the call is routed through the telephone.