tanx for youe great help, now, my freeradius can Authorizes users by PHP script, also start and stop accounting. but reply(Authentication) and nas control( checking secret key) done via freeradius,1)I want to add these items to php too. I did these testes by ntradping, but I want to run this freeradius for voip aaa (quintum tenor), 2)is there any simulator like ntradping for voice packets. 3) am I need any new freeradius's plugin to work with quintum(tenor)? 4) where can I find any good Document, specialy talks about voip aaa with freeradius (executes external php scripts for AAA). Best __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com