IEC 61756-1-2019 PDF

Full title and description

Fibre optic interconnecting devices and passive components - Interface standard for fibre management systems - Part 1: General and guidance. IEC 61756-1:2019 (Edition 2.0) provides definitions, interface rules and guidance for fibre management system (FMS) interfaces and includes criteria and an example method to identify the minimum bending radius for stored fibres; it applies to both single-mode and multimode fibres and does not cover liquid, gas or dust sealing at cable entry areas.

Abstract

IEC 61756-1:2019 is the second edition of Part 1 of the IEC 61756 series. It updates and replaces the 2006 edition by adding figures and definitions (protective housing, closure, wall box, street cabinets, optical distribution frame modules), tables of fusion-splice and mechanical-splice protector dimensions, a method and example for minimum bending radius calculation, and additional clauses on factors relevant to fibre management systems. The document gives manufacturers, designers and system integrators guidance to create consistent physical and functional interfaces within fibre management systems.

General information

• Status: Published – International Standard (current edition, replaces IEC 61756-1:2006).
• Publication date: 27 November 2019.
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 33.180.01 (Fibre optics).
• Edition / version: Edition 2.0 (2019).
• Number of pages: 62 pages.

Key bibliographic and lifecycle metadata (publication date, edition, ICS and page count) are provided on the IEC webstore product entry for IEC 61756-1:2019.

Scope

IEC 61756-1:2019 specifies general information and guidance for the interface of fibre management systems used in optical networks. It defines terminology and rules for creating FMS interfaces, provides criteria and an example calculation for the minimum bending radius of stored fibres, and addresses physical, geometrical and mechanical interface aspects necessary for direct exchange of optical signals between incoming and outgoing fibre cables. The standard applies to single-mode and multimode fibres and excludes sealing requirements at cable entries or cable element endings.

Key topics and requirements

• Definitions and rules for creating fibre management system (FMS) interfaces (protective housing, closure, wall box, street cabinet, ODF modules).
• Criteria and worked example for identifying the minimum bending radius for stored fibres (including method and annex example).
• Dimensions and guidance for fusion splice protectors and mechanical splices (tabulated values).
• Guidance on the interface between protective housings and fibre management systems (figures added in the 2019 edition).
• Applicable to both single-mode and multimode fibre applications; excludes liquid/gas/dust sealing at cable entries.

The listed topics reflect the technical changes and content additions introduced in the 2019 (second) edition.

Typical use and users

Typical users include fibre management system and cabinet manufacturers, optical distribution frame and closure designers, telecom equipment vendors, system integrators, network architects, installers and commissioning teams, test laboratories and procurement/specification authors. The standard is used to harmonize mechanical and functional interfaces, reduce integration issues between equipment from multiple suppliers, and to ensure safe handling and storage of fibres with controlled bend radii.

Related standards

IEC 61756-1:2019 is part of the IEC 61756 family concerned with fibre management interfaces and is published alongside regional adoptions (for example EN IEC 61756-1:2020), national translations and technical variants (e.g., DIN/BS adoptions). It formally cancels and replaces IEC 61756-1:2006. For interoperability and performance requirements of passive fibre components, related IEC and EN standards such as performance and test series for fibre interconnecting devices (for example parts of the IEC 61753 and IEC 61754 series) are commonly referenced alongside IEC 61756-1 in procurement and design documents.

Keywords

fibre management system, FMS interface, optical distribution frame, minimum bending radius, fusion splice protector, mechanical splice, protective housing, closure, wall box, street cabinet.

FAQ

Q: What is this standard?

A: IEC 61756-1:2019 is Part 1 of the IEC 61756 series — an interface standard that provides general guidance and definitions for fibre management systems used in optical networks.

Q: What does it cover?

A: It covers definitions, rules for creating FMS interfaces, guidance on physical and geometrical interface aspects, tables for splice protector dimensions, a method and example to determine minimum bending radius for stored fibres, and figures showing interfaces between protective housings and FMS components. It does not address liquid/gas/dust sealing at cable entries.

Q: Who typically uses it?

A: Manufacturers of fibre management equipment, cabinet and closure designers, system integrators, network planners, installers, test labs and procurement/specification authors use this standard to ensure consistent interfaces and safe fibre handling.

Q: Is it current or superseded?

A: IEC 61756-1:2019 is the current (second) edition published on 27 November 2019; it cancels and replaces IEC 61756-1:2006. The IEC webstore lists the 2019 edition as Edition 2.0 with a stability date noted by IEC.

Q: Is it part of a series?

A: Yes — it is Part 1 of the IEC 61756 series (fibre optic interconnecting devices and passive components — interface standard for fibre management systems); other IEC/EN standards covering related performance, dimensional and test requirements (for example IEC 61753 and IEC 61754 series) are commonly used together with IEC 61756-1.

Q: What are the key keywords?

A: Key keywords include fibre management system, FMS interface, minimum bending radius, protective housing, closure, splice protector, optical distribution frame, single-mode, multimode.