Hello, I have successfully compiled ipjsua app on iPod touch having iOS 5.1 sdk. The application runs perfectly well in foreground. I have issues in background mode that is as follows. when application is in background(on iPod touch), I am not able to receive incoming calls from ipjsua running on simulator. As soon as I bring ipjsua app(running on iPod touch) in foreground,the call gets connected to ipjsua(running on simulator). It seems that TCP port(SIP) gets blocked when application goes in background on IPOD touch. Please note that there is no sip server instance involved.I am making direct call to iPod touch from iPhone simulator by specifying SIP URI. Please help. Regards Rohit -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20120902/508a0cda/attachment-0001.html>