Hi, I'm making program to check tel. numbers for "correctness". Normal call looks like this(simplified): -> INVITE <- Session in progress with Session Description Call begins call to non-existing/busy number (usually): ->INVITE <- Session in progress with Session Description Call begins (after <1sec) <-404 Not Found / 486 Busy Call Ends But there are some calls which look like first one, and I can hear some audio information like "Number doesn't exist" repeated couple times, after this server send normal response code (like 404). Problem is i cant recognise this audio information's, so my question is: Can i somehow distinguish "normal call" from "audio information", or can i get response code faster ?
