Hi, As someone wondered in http://permalink.gmane.org/gmane.comp.voip.pjsip/14083 and Ming suggested a fix in ticket http://trac.pjsip.org/repos/ticket/1175 We couldn't have a clue about the frustrated comments about RemoteControlEvent, my program runs well without it /* Make sure that your application can receive remote control * events by adding the code: * [[UIApplication sharedApplication] * beginReceivingRemoteControlEvents]; * Otherwise audio unit will fail to restart while your * application is in the background mode. */ /** * As in iOS SDK 4 or later, audio route change property listener is * no longer necessary. Just make surethat your application can receive * remote control events by adding the code: * [[UIApplication sharedApplication] * beginReceivingRemoteControlEvents]; * Otherwise audio route change (such as headset plug/unplug) will not be * processed while your application is in the background mode. */ What do all these things mean ? -- Khoa Pham HCMC University of Science Faculty of Information Technology -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20130508/7ba97505/attachment-0001.html>