I would be very against it calling the emergency services - as they tend to be costly when incorrectly called out - however alerting campus security/campus EMTs - that is a good thing. Any large facility worth it's salt is going to have an incident management process. Whilst I would expect the person in charge of the facility at the time to have a significant knowledge of those processes and procedures, from a risk management point of view the sooner you can get a patient from being checked over by a trained first aider, to "in the care of a trained EMT" the better. I used to be the tech manager for a theatre located in a casino in Australia. Our EMT's had advanced life support equipment - essentially the contents of an ambulance or a small ER - on site and there were always 2 EMT's on duty.My Red Cross first aid training suggests getting someone to find and bring the first aid kit and/or AED for almost any situation. That doesn't mean it's going to be used, just that it's immediately available if needed. I'm torn regarding the local alarm and the summoning emergency personnel. As someone responding to the situation, I'd err on the side of caution and call 911. But as a business, I understand that a number of false alarms can get you reprimanded or punished. I wouldn't want opening the cabinet to have the AED in a standby to cause more issues. Though at that level, I suppose the management that installed the thing can take responsibility for any issues.