Hello, I set NULL also Default. But i get same error. Code: ==== pjsua_media_config media_cfg; pjsua_media_config_default(&media_cfg); ... status = pjsua_init(&cfg, &log_cfg, &media_cfg); // tried NULL too if (status != PJ_SUCCESS) error_exit("Error in pjsua_init()", status); Error: ==== 14:08:58.485 tsx0x9512664 State changed from Null to Calling, event=TX_MSG 14:08:58.485 pjsua_acc.c Registration sent 14:08:58.485 pjsua_media.c Error retrieving default audio device parameters: Unable to find default audio device (PJMEDIA_EAUD_NODEFDEV) [status=420006] 14:08:58.485 APP Error making call: Unable to find default audio device (PJMEDIA_EAUD_NODEFDEV) [status=420006] 14:08:58.492 pjsua_core.c Shutting down... 14:08:58.492 pjsua_pres.c Shutting down presence.. 14:08:58.492 pjsua_media.c Shutting down media.. Please advise. Thank you Regards -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20100804/2eeace6f/attachment.html>