Inženjering uzajamnog uticaja okoline i opreme (EE) — Uslovi okoline i ispitivanja uticaja okoline na telekomunikacionu opremu — Deo 1-3: Klasifikacija uslova okoline — Stacionarna upotreba na lokacijama zaštićenim od vremenskih uticaja
Environmental Engineering (EE); Environmental conditions and environmental tests for telecommunications equipment; Part 1: Classification of environmental conditions; Sub-part 3: Stationary use at weatherprotected locations