This release has few changes but some fairly important bugfixes. It fixes history logic and the instant messaging user interface. It improves the SIP core by adding a keep-alive for account registration and updating the Contact header from 200 OK.
This new version fixes several important bugs. Attended transfer is the main new feature. One can now drag and drop two calls on each other and select between transferring the call or creating a conference call.
Refactoring audio RTP session. Updated synchronization between the transport layer and audio layer. A better implementation of SIP early media playback. A configuration serialization engine. Default Evolution addressbook support and addressbook authentication support.