The FernTel 3 Z2 Telephone for applications in potentially explosive areas of zone 2 and 22. The telephone comprises a housing made of impact-resistant thermoplastic and is certified according to ATEX. In the field of the chemical and petrochemical industry potentially explosive atmospheres occur during production procedures caused by e.g. gases, vapours or mist. Its striking signal colours ensure that the FernTel 3 Z2 cannot be missed whenever a telephone is urgently needed within potentially explosive areas of zone 2 or 22. The impact-resistant thermoplatic housing as well as the use of stainless steel screws add further special advantages to the FernTel 3 Z2. Moreover, the telephone may effortlessly be converted from a wall-mounted device to a desk telephone and vice versa.