title: How to Detect sip call forward to server's Voice mail?
body: <p>Am Using Pjsip libraries for SIP implementation . Using Pjsip lib i can able to make IP calls perfectly  . My problem is While I Make call if other End User Decline/not Reachable or No answer ,My call  will connect with Voice mail and get 200k(call connected state) from sip server as same like other end user Answering call.<br>
      Not Reachable Case i can differentiate 200 ok By missing 183 Session Progress Message. But noanswer and decline case I couldn't get the actual State of call .<br>
       is any way to find call connected state and Voice mail connected state ? </p>