diff --git a/sessionmanager/fssessionmanager.go b/sessionmanager/fssessionmanager.go
index fb2ae547f..5dd3e4ca1 100644
--- a/sessionmanager/fssessionmanager.go
+++ b/sessionmanager/fssessionmanager.go
@@ -119,10 +119,12 @@ func (sm *FSSessionManager) OnChannelHangupComplete(ev Event) {
 	s := sm.GetSession(ev.GetUUID())
 	if sm.sessionDelegate != nil {
 		sm.sessionDelegate.OnChannelHangupComplete(ev, s)
+		s.SaveMOperations()
 	} else {
 		log.Print("HangupComplete")
 	}
 	if s != nil {
+
 		s.Close()
 	}
 }
diff --git a/sessionmanager/session.go b/sessionmanager/session.go
index 5304ce761..756296f13 100644
--- a/sessionmanager/session.go
+++ b/sessionmanager/session.go
@@ -104,3 +104,12 @@ func (s *Session) Disconnect() {
 func (s *Session) String() string {
 	return fmt.Sprintf("%v: %s -> %s", s.callDescriptor.TimeStart, s.callDescriptor.Subject, s.callDescriptor.DestinationPrefix)
 }
+
+// 
+func (s *Session) SaveMOperations() {
+	go func() {
+		for _, cc := range s.CallCosts {
+			log.Print(cc)
+		}
+	}()
+}