I downloaded the PJSIP stack pjproject-1.0-rc2 from www.pjsip.org and built it (without any modification to the PJSIP stack) using Carbide. I am using S60 3rd edition FP2 emulator software for loading and running the same. The call setup i am trying to make is as follows. s60 emulator on PC1 <---> PC3 Running registration server <---> s60 emulator on PC2 When I do make a call, the SIP signaling goes through fine (I got to know this cause i captured packets using ethereal). However, the next part, i.e. the transfer of audio, is not happening. Can you please let me know If any modification is required to get the audio part working? If not, what else is required? Thanks for your help.... -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080912/593b39aa/attachment.html