I have made one and currently in process of releasing it to open source. I will soon share it with source codes, meanwhile you can read some bits on design here: http://bobbbloggg.blogspot.com/2009/04/designing-managed-api-over-flat-native.html http://bobbbloggg.blogspot.com/2009/09/fluent-builder.html This is a .Net wrapper around pjsua-lib API providing a high-level softphone interface. It has an option of connecting all incoming calls to the conference. Best regards, RobertT. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20100826/6c631ceb/attachment.html>