Hi, I am working on Presence management on a SIP client. I have something working based on SUBSCRIBE / NOTIFY mechanism and Asterisk hints. I know that an other solution could be implemented using peer to peer SUBSCRIBE / PUBLISH mechanism. I would like to understand the advantage and drawback of each solution. My main concern is the case of a complex VOIP environment such as Asterisk server to server connection. As example if we have : [client A] <----------> [Asterisk 1] <-----------> [Asterisk 2] <----------->[client B] Using hints and SUBSCRIBE / NOTIFY would it be possible for client A to be notified of client B presence modification ? If client A can call client B, it would make sense to have SUBSCRIBE / PUBLISH with peer to peer mechanism working. Am I right ? Thanks for your advice, Eloi -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.digium.com/pipermail/asterisk-users/attachments/20130702/d4197ef7/attachment.htm>