This isn’t talked about much, I haven’t heard of a system that sounds like this, the speaker strobe also looks to be rare (I think it’s a federal signal or 90s E90)
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This may be an older Honeywell system.
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Probably an FCI. Honeywell fell off (when it came to making original things) after their FS90 panel which had voice evacuation capabilities. The thing is it has different slow whoops, one of them is long (around 7 seconds), and the other is long but a bit shorter.
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