A smoke and temperature detection system , comprising: a plurality of fiber optic cables terminating in a plurality of nodes disposed to monitor a smoke condition at one or more protected spaces: a temperature detection fiber optic cable , the temperature detection fiber optic cable having a plurality of fiber Bragg gratings arrayed along the temperature detection fiber optic cable; a control system operably connected to the plurality of fiber optic cables and to the temperature detection fiber optic cable, including: a first light source configured to transmit a first light signal along the plurality of fiber optic cables; a second light source configured to transmit a second light signal along the temperature detection fiber optic cable; a first light sensitive device configured to receive a scattered light signal from the plurality of fiber optic cables ; and a second light sensitive device configured to receive a reflected light signal from the fiber Bragg gratings ; wherein the control system is configured to detect a temperature at the fiber Bragg gratings based on one or more properties of the reflected light signal received at the second light sensitive device ; wherein the control system is configured to analyze the scattered light signal detected at the first light sensitive device to monitor the smoke condition; wherein the plurality of fiber Bragg gratings are disposed at the plurality of nodes ; and wherein the plurality of fiber Bragg gratings are arranged along the temperature detection fiber optic cable between the nodes . a temperature detection fiber optic cable , the temperature detection fiber optic cable having a plurality of fiber Bragg gratings arrayed along the temperature detection fiber optic cable; a control system operably connected to the plurality of fiber optic cables and to the temperature detection fiber optic cable, including: a first light source configured to transmit a first light signal along the plurality of fiber optic cables; a second light source configured to transmit a second light signal along the temperature detection fiber optic cable; a first light sensitive device configured to receive a scattered light signal from the plurality of fiber optic cables ; and a second light sensitive device configured to receive a reflected light signal from the fiber Bragg gratings ; wherein the control system is configured to detect a temperature at the fiber Bragg gratings based on one or more properties of the reflected light signal received at the second light sensitive device ; wherein the control system is configured to analyze the scattered light signal detected at the first light sensitive device to monitor the smoke condition; wherein the plurality of fiber Bragg gratings are disposed at the plurality of nodes ; and wherein the plurality of fiber Bragg gratings are arranged along the temperature detection fiber optic cable between the nodes . a first light source configured to transmit a first light signal along the plurality of fiber optic cables; a second light source configured to transmit a second light signal along the temperature detection fiber optic cable; a first light sensitive device configured to receive a scattered light signal from the plurality of fiber optic cables ; and a second light sensitive device configured to receive a reflected light signal from the fiber Bragg gratings ; wherein the control system is configured to detect a temperature at the fiber Bragg gratings based on one or more properties of the reflected light signal received at the second light sensitive device ; wherein the control system is configured to analyze the scattered light signal detected at the first light sensitive device to monitor the smoke condition; wherein the plurality of fiber Bragg gratings are disposed at the plurality of nodes ; and wherein the plurality of fiber Bragg gratings are arranged along the temperature detection fiber optic cable between the nodes . <EOS>