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Phone line requirements for Fire Alarm Systems

Question asked by bpellegrin on Mar 1, 2018
Latest reply on Mar 1, 2018 by cdafd

I currently work at a University that has 126 fire alarm systems.  Some as old as 1980 and others were replaced as recently as 3 weeks ago.  When discussing phone line options it is my understanding that effective in 2013 the code mandates that 2 phone lines cannot be used.  One has to be an alternate source of communication.  If someone could explain the requirements it would help.