In this session, discuss the addition of a reverse signal detection for inbuilding emergency services personnel. This function gives a proximity location or heatmap for the person within the building. The feature is important because it gives the user an alert of where the emergency services personnel are in the building including their vertical proximity location. This option can be added to existing public safety monitoring systems. There are a few paths to implementation; some released technology and some conceptional ideas will be discussed for all types of monitoring systems.