Not sure exactly what you are trying to do, but if you are looking for correct answer supervision, you would set answer delay to 90 or more along with the other supervision parameters as documented in the answer supervision document on quintum’s web site.
As for the false ring tone, without seeing the config, I cannot say for sure, but 80% of the time, it is the origination device that is providing the false ring tone.
MikeM
mike_voip@hotmail.com