They are used for data telecommunication in Industrial automation systems, networking and electronic control systems. They can be produced according to their needs with PVC, PE, HFFR outer sheath, armoured and screened or unscreened. CAT 5e Cables that are tested according to ISO Class D standards used in data transmission systems which reaches up to the speed of 155 Mbit/Sec. They are particularly preferred in management, research and development buildings, offices where there are many terminals. Maximum run length of cables should not exceed 90 m according to ISO/IEC11801 and EN 20173. Data cables that are used in longer distances in comparison to RS 232-422 also produced armoured, unarmoured depending on the end use it can also be produced for indoor and outdoor purposes.