On Sat, Aug 8, 2009 at 3:33 PM, Jose Suarez<jsuarez at padirac.com.ar> wrote: > Why the pjsua_call_make_call function need to retrieve the > audio device? When I execute the pjsua example it fails because the > following error: "Error retrieving default audio device parameters: Unable > to find dafult audio device"? If I want to make a Call using SIP why does it > need an audio device? So If I want to do a lot of call simultaneusly I need > one audio device for each thread??? How can I configure that?? No. You don't need it. http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/2008-August/004096.html