Building codes across North America are somewhat uniform in the requirement of 'UNMONITORED' fire alarm systems including 'Pull Station's, 'Audible Alert' (Bells Sirens), 'Detection Device's (Smoke Detectors, Sprinkler Heads) in most multi use buildings including apartments, schools, library's, office buildings, warehouse's etc.
Unfortunately MOST PEOPLE make the ASSUMPTION the presence of these devices indicate they are connected to
A FIRE DEPARTMENT...