The new telephone for use in areas with explosive atmospheres of zone 2 and 22. Its housing is made of impactresistant and shockproof Polycarbonate and approved for Zone 2 and 22 according ATEX. Within ranges of the chemical and petrochemical industry combustible atmospheres result again and again from process engineering operational sequence. Caused e.g. by gas, steam or nebula. Its striking signal colour ensures the FernTel 3 / Zone 2 cannot be missed whenever a telephone is urgently needed in Zone 2 and 22.