Why there is no voice audible when the call-out operation is successful and the telephone receiver is picked up although I have recorded an audio message?
The program uses the WAV file recorded by the users. However, there are a variety of WAV formats. Usually Windows automatically sets the audio format at the default value CD quality, 24KHz and 32Bit, but the audio format that can be used by the surveillance system is Mono, 8KHz and 16Bit. Only this audio format can be played in the call-out operation.
