Hi, When you use pjsua API, pjsua_create activates input and output media. On iPod touch/iPhone, when micro is activated CPU increases to 80%. So is it possible to deactivate input media (micro) when there are no call, and activate input media when the call is established ? For example in callback 'on_call_media_state' when the media_status equals PJSUA_CALL_MEDIA_ACTIVE (establishing) If it's possible where should I closed media input when call is hang up ? Thanks Samuel