This specification defines the construction, mechanical and optical requirements for optical trunk cable for use on the railway for telecommunication and control purposes. The cable will generally be installed in ground level troughing, although installation in duct routes will. As an important tool to ensure driving safety, realize information transmission and improve transportation efficiency, the railway communication network is constantly innovated along with the rapid development of modern railway technology. 56 was approved by ITU-T Study Group 6 (2001-2004) under the ITU-T Recommendation A. The ITU Telecommunication. Big Data, IoT and digitalisation have long since been part of the rail and aviation sectors – whether in the form of signalling technology or inflight entertainment. Data transfer over high-performance optical fibre cables has three core properties which are of particular value in these challenging. These radio systems connect trains with the traffic control systems in the railway's own data centers via state-of-the-art railway control systems and new digital signal boxes.
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