[SR-Users] Concurrent calls after forked invite

Hello, I have two UACs registered to kamailio v4.0.4 with the same URI. (bob(a)example.com) Then a third registered UAC (alice(a)example.com) sends an invite to bob(a)example.com. Both bob UACs accept the call and respond with a 200 Ok. The statefull proxy now takes the first one and cancels the second one. In my case I need both responses to be send back to alice through the proxy. I want the Invite to be forked in parallel (works) and both calls to get connected concurrently (does not work). Is there such a feature in the statefull proxy? Can this be done using a stateless proxy? I stumbled on some proposal about a "New Dialog Module Design" [1]. This is excetly what I'm looking for. Is this still just a proposal? Thanks! Lukas PS: I also posted this question in stackoverflow [2] [1] http://www.kamailio.org/dokuwiki/doku.php/modules-new-design:dialog-module-… [2] http://stackoverflow.com/questions/32519551/kamailio-concurrent-calls-after…