3.3.1.5.2 Awaiting Open Response
The following events are processed in this state:
Receiving an XAUSER_XACT_MTAG_OPENED Message (section 3.3.5.3.1)
Receiving an XAUSER_XACT_MTAG_OPEN_NOT_FOUND Message (section 3.3.5.3.2)
Connection Disconnected (section 3.3.5.3.7)