This action allows the system to trigger alarm output action scripts, for example, triggering a siren, upon the occurrence of an event. To learn how to configure alarm output action scripts see How to add output events.
On this screen select the camera or I/O Device that contains the alarm output action script you want to activate. Then select the event and drag it to the list below, as shown in the figure above.
You can output actions from several devices and the system will call all actions simultaneously, but you must choose only 1 action per device.