Appendix A - Call Control Scenarios
401
When a transferred call is disconnected, the network informs the TBCT controllerby sending a NOTIFY message with the Network Call Reference Value. Theapplication receives the GCEV_EXTENSION event (with ext_id =GCIS_EXEV_NOTIFY) event.The following figures provide line diagrams that illustrate the operation of thisfeature. Figure 7 shows the invocation of TBCT with notification in which bothcalls answered.
Controller Network User
A
UserB
FACILITY
(Invoke)
UserA andB connected
FACILITY
(Returnreult:
Invoke:Transfers:
activetransfers.
availabletransfers:
Invoke:Set C allTab)
DISCONNECT
(CR = call # 1 )
RELEASE
RELEASE
COMPLETE
RELEASE
RELEASE
COMPLETE
NOTIFY
(No t ific a tio n :
TransferredCall
Clearing:
CallTag:
No tifica tio n :
Transfers:
activetransfers,
availabletransfers)
NOTIFY
(calltra n s fer active )
NOTIFY
(calltra n s fe r active )
Calltransferred
.
.
.
TransferredCallCleared
DISCONNECT
Figure 7. TBCT Invocation with Notification (Both Calls Answered)