A) Smart Things doesn’t dial the Police department. It does have integration with Scout security monitoring comany. (Optional)
B) You can set an action to activate a Siren from any individual or a group of motion sensors to activate a Siren. But do you have multiple Sirens or do you have one for the entire house? Also, motion sensors can give off falls Alarms. So you may need to setup multiple motion sensors to monitor a single zone from different angles. For this, there is a multi motion sensor app developed by one of the ST community developers. Smart Zone motion detector (Zone Motion Manager) 2.0.1 release.
C) You can use SmartTiles; anothe community app to give different apartments different access.
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