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NFPA 1221 vs. NFPA 72 - Same / Different?

Question asked by jfoley on Aug 5, 2016
Latest reply on Aug 5, 2016 by psmith

Is NFPA 1221: "Standard for the Installation, Maintenance, and Use of Emergency Services Communications Systems"  intended to replace the relevant sections of NFPA 72? Why do they both exist, and what is the difference?