9/11 Museum Alarms (EST)

Not sure if anyone cares but the 9/11 Memorial & Museum uses some kind of est system like est 3. I’d think they would also use firecom just like the wtc towers but I guess not. I don’t believe the WTC is related to the 9/11 museum instead running speareate from each other.
You can find the video here: Visiting The 9/11 Memorial & Museum In New York 4K - YouTube