DIN EN IEC 61280-4-2:2025-11

This part of 62180-4 is applicable to the measurements of attenuation and optical return loss of an installed optical fibre cabling plant using single-mode fibre. This cabling plant can include single-mode optical fibres, connectors, adapters, splices, and other passive devices. The cabling can be installed in a variety of environments including residential, commercial, industrial and data centre premises, as well as outside plant environments. This document is applicable to all single-mode fibre types including those designated by IEC 60793-2-50 as Class B fibres. The principles of this document can be applied to cabling plants containing branching devices (splitters) and at specific wavelength ranges in situations where passive wavelength selective components are deployed, such as WDM, CWDM and DWDM devices. This document is not intended to apply to cabling plants that include active devices such as fibre amplifiers or dynamic channel equalizers. The standard covers the fundamentals of measurement, the description of the measurement setup, calibration, as well as performance, documentation, and evaluation of the measurement. There are no restrictions on the scope of application of this document. The standard differs from DIN EN 61280-4-2 (VDE 0885-804-2):2015-05 as follows: a) addition of the equipment cord method; b) addition of test limit adjustment related to test cord grades; c) refinements on measurement uncertainties. This standard is part of the fundamental knowledge of optical fibre measurement techniques. Any technician entrusted with acceptance testing of installed transmission links is well advised to be familiar with and apply the content of this standard. The standard is suitable for verifying compliance with the requirements of the Gigabit Infrastructure Act (GIA 2024) and the specifications set forth in the corresponding national regulation.