scope:

IEC 61756-1:2019 covers general information on fibre management system interfaces. It includes the definitions and rules under which a fibre management system interface is created and it provides also criteria to identify the minimum bending radius for stored fibres. This document allows both single-mode and multimode fibre to be used. Liquid, gas or dust sealing requirements at the cable entry area or cable element ending are not covered in this document. This second edition cancels and replaces the first edition published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - addition of figures to show the interface between protective housing and fibre management system; - addition of definitions for protective housing, closure, wall box, street cabinets and optical distribution frame modules; - addition of table with dimensions of fusion splice protectors and mechanical splices; - addition of method to identify the minimum bending radius for stored fibres; - addition of clause for other factors relevant to fibre management systems; - addition of annex A for example of calculating the minimum bending radius of stored fibres in a fibre management system. Keywords: fibre management system interfaces, minimum bending radius for stored fibres