Hi, I am trying to implement conference manager. Scenario is as follows; Participant wants to perform 'call hold' through reinvite. Participant A ------>(reinvite) *conference manager* ----------->(reinvite) Participant B ----------->(reinvite) Participant C (200 ok)<------------- Partcipant B (200 ok)<-------------- Participant C (200 ok)<--------- Conference manager will respond with 200 ok only after receiving 200 ok from both participant B and C. If for some reason 200 ok is not received from either participant A or C, then conference manager should respond with "486 One or more participant is temporarily unavailable" error code. I am not able to find a way to send error code for a reinvite ? In case of sdp negotiation failure or any other failure, pjsip responds with "488 Not acceptable here" by itself. But here, this error code will send incorrect message to participant. -kindly guide. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20120127/6ad648d8/attachment.html>