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The audio file used to broadcast must be a .wav file set at PCM 8 KHz, 16 Bit, Mono. This format is the global standard for traditional telephone networks.
IMPORTANT: Please make sure that you do not have any silence in the beginning of your recording. The silence will likely to cause people to hang up. You can use an audio file editing tool, such as GoldWave, to remove the initial silence.
You can specify the broadcast time to prevent outbound calls during inappropriate times, such as late in the evening. To set the time, select Broadcast --> Options from the main menu.
An ongoing broadcast will be automatically stopped once it reachs the blocked time.