Hi! Do you mean *void(* pjsip_inv_callback::on_media_update)(pjsip_inv_session<http://www.pjsip.org/pjsip/docs/html/structpjsip__inv__session.htm>*inv_ses, pj_status_t<http://www.pjsip.org/pjlib/docs/html/group__PJ__BASIC.htm#gab43ba3167bd2a2ab4580509dbf79200e>status) * method? from http://www.pjsip.org/pjsip/docs/html/structpjsip__inv__callback.htm#aafbe25fa41f5aa57dfe5a42bf025f2d How can be this call back initiated to come to method *static void pjsua_call_on_media_update(pjsip_inv_session *inv,* * pj_status_t status)* in pjsua stack? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20120727/1e2bb7c5/attachment-0001.html>