Dear Sir, Same PC running: A) SIP server B) Media Server C) Media Server proxy Sip phone D) PJSIP client user agent Senario: 1. I want to shutdown B and C 2. PJSIP client two instance i want to make 3. Same PC only one user agent i can use? Because it shows error, where i wanted two PJSIP user agent test - Please checkout the screen shot. http://i.imgur.com/Q6XZu.png 22:52:24.272 pjsua_media.c Error retrieving default audio device parameters: Unable to find default audio device (PJMEDIA_EAUD_NODEFDEV) [status=420006] 22:52:24.272 APP Error making call: Unable to find default audio device (PJMEDIA_EAUD_NODEFDEV) [status=420006] Note: Media Server and Media Server Client's can be used for multi instance no matter. For example client 1 connected to sip 1, client 2 connected to sip 2, sharing same media in/out. possible? Thank you Best regards Shamun -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20100801/e86ab3b1/attachment.html>