Hi, Thanks for your reply.I got what is happening in that scenario. Could you please tell me how the Astrisk pbx identifies a confernce? What is the sequence of sip messages supported by the astrisk pbx conference? Any help will be highly appreciated. preethy -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20080307/d356253e/attachment.htm