The series of part 4 of the European Standard EN 50289 specifies the environmental test methods for cables used in analogue and digital communication systems. Part 4 of EN 50289 consists of the following documents: - Part 4-1 Environmental test methods - General requirements; - Part 4-2 Environmental test methods - Water penetration; - Part 4-3 Environmental test methods - Moisture permeation; - Part 4-4 Environmental test methods - Resistance to solvents and contaminating fluids; - Part 4-5 Environmental test methods - Climatic sequence; - Part 4-6 Environmental test methods - Temperature cycling; - Part 4-7 Environmental test methods - Damp heat steady state; - Part 4-8 Environmental test methods - Nuclear radiation; - Part 4-9 Environmental test methods - Pneumatic resistance: - Part 4-10 Environmental test methods - Ageing; - Part 4-11 Environmental test methods - A horizontal integrated fire test method; - Part 4-12 Environmental test methods - Acid gas evolution; - Part 4-13 Environmental test methods - Smoke generation; - Part 4-14 Environmental test methods - Lightning; - Part 4-15 Environmental test methods - Toxic gas emission; - Part 4-16 Environmental test methods - Fire resistance. Further test details (e.g. temperature, duration) and/or test requirements are given in the relevant cable standard.