Hi, Thanks for all the guidance and now I am able to compile and Link the new version. I have also compiled symbian_audio as I want to transmit voice on call using symbian platform. But the problem is still the voice is not being transmitted. It is showing no errors as such. It is creating the sound device and ports but m still not able to transmitt the voice. Can you suggest something in this regard. Thanks in advance Saurabh Agarwal Why delete messages? Unlimited storage is just a click away. Go to http://help.yahoo.com/l/in/yahoo/mail/yahoomail/tools/tools-08.html -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20071122/0e38228e/attachment.html