Autodialer NOT play message for live pickup

This is a very common question:

How do I set the auto dialer to NOT leave the recorded message when someone picks up the phone?

Answer:

1) Use the message designer to design different messages for human vs. answering machine. For details, please select Help > Product Walkthrough… > Play different message for answering machine from the program main menu.

2). If you have release 4.5.0 beta or later, do not choose any audio files for human pickup. So when human pickup the phone, the system will hangup.

3). If you have release 4.3.1 or before, select a silent audio file for human pickup. The audio file may just contain half second of silence. So when human pickup, the system will play the silence for half second and hangup. (This is a work around for a bug in the system).