Sip_Info it only name of parameter but the fuction is pjsua_call_make_call( current_acc, &tmp, 0, NULL,&msg_data , NULL); it is a function of sip-invite Attached is the photo capture for wireshark of this message invite _________________________________________________________________ Votre messagerie et bien plus o? que vous soyez. Passez ? Windows Live Hotmail, c'est gratuit ! https://signup.live.com/signup.aspx?id=60969 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20100628/9de06f31/attachment-0001.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: Capture-1.png Type: image/png Size: 191751 bytes Desc: not available URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20100628/9de06f31/attachment-0001.png>