Explore three essential telecommunications standards that shape today's connectivity and smart utility management: prEN IEC 60794-1-117:2025 for testing bending stiffness in optical fibre cables, SIST EN 13757-3:2025 covering application protocols for meter communications, and SIST. Explore three essential telecommunications standards that shape today's connectivity and smart utility management: prEN IEC 60794-1-117:2025 for testing bending stiffness in optical fibre cables, SIST EN 13757-3:2025 covering application protocols for meter communications, and SIST. Supplement 47 to ITU-T G-series Recommendations provides information on the general transmission characteristics of single-mode optical fibres and cables specified in the ITU-T G. 65x-series of Recommendations related to the practical use condition. It covers the environmental and length-related. ANSI/TIA‑568. 11 Optical Fiber Systems Subcommittee and published in September, 2022. Scope: This Standard specifies performance, transmission, and test and measurement requirements for premises optical fiber cable. This article explores three cornerstone telecommunications standards: prEN IEC 60794-1-117:2025, SIST EN 13757-3:2025, and SIST EN IEC 60794-2-20:2025. These standards underpin reliable connectivity, robust fibre networks, and smart metering—crucial as businesses roll out new technologies and scale. The International Telecommunication Union (ITU) plays a crucial role in this by providing a series of recommendations that serve as global standards. This work materialized through the development of good practices, procedures and specifications documents, reflecting a certain state of the art at a given time, and the result of a consensus of all stakeholders (op lable. Industry standards for optical fiber cables, components, systems and applications continually evolve and progress in an effort to ensure interoperability, performance, uniform testing and support for the latest technologies, bandwidth demand and industry initiatives.