Not related to Fire alarms, but What school bell is this in my school?

Not Fire alarm related. My high school has a very interesting school bell and intercom. Page tone is about a high pitched chime (maybe?) and it is just weird and very hard to explain. Note the Fire alarm system is a Simplex Voice evac system with Truealerts. Intercom Loudspeakers are Penton and Atlas. I have a video here:

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