Verizon Fios User Manual page 178

EnviRonmEntaL paRamEtERS
Operating Temperature: 5° C to 40° C (41° F to 104° F)
Storage Temperature:
Operating Humidity:
Storage Humidity:
-5° C to 50° C (23° F to 122° F)
5% to 85%
5% to 93% (non-condensing)