In order to make all these elements work together, the Act operation is inherited by the observers from the CORBA IObserver interface. When the Act operation is called for Alarm Observers, the alarm is activated.

on the Drawing toolbar. Click
the AlarmObserver and draw an inheritance line to
the IObserver and click to end the line.
on the Drawing toolbar.
Click the SDM class and then the IObserver class.
Type the name itsObservers in the area highlighted
on the line.
