How to set automatically leave a message on the answering machine line?

How to set automatically leave a message on the answering machine line?

Please set it from the ‘Voice Activity Detection’ tab under Ecsow Skype Dialer Options. The ‘Enable voice activity detection’ option and ‘Leave a message on the answering machine line’ option must be checked. And you should record/specify the voice message file.(Notes: Voice message must be 16kHz, mono wave format file.)