Following the 9/11 terrorist attacks, first responders realized that radio coverage was severely lacking in some buildings—which can be a critical problem during life-threatening situations. This created a push for changes to the National Fire Protection Association (NFPA) code, requiring more robust and consistent radio coverage in buildings. A Public Safety/First Responder Radio Enhancement System can be installed when certain areas of your facility or building do not meet the minimum inbound and outbound signal strengths established by the NFPA.