vicidial.org

i want to save my voip cost by avoiding the voice mail. i want to proceed to nest call before it starts the voice mail message. so what should i set the the dial timeout , is 19 second good for 4 bells

I have no clue how it works in your corner of the world, but here in Canada, every ring is 6 seconds, and most phones go to voicemail after 4 or 5 rings depending on provider.