some query regarding AMD

hello
i have implemented AMD in my dialer implementation its working but
its not upto the mark
i am using SIP trunk can someone guide be any specific setting for SIP
trunks so that i can achive best possible results
i basicaly want to know some brief on what parameter in AMD() i shall play around on SIP trunks
i have implemented AMD in my dialer implementation its working but
its not upto the mark
i am using SIP trunk can someone guide be any specific setting for SIP
trunks so that i can achive best possible results
i basicaly want to know some brief on what parameter in AMD() i shall play around on SIP trunks