Other tools NBS offers a range of tools for specification and collaboration National BIM Library The most trusted BIM Library in the UK, certified to the internationally-recognised NBS BIM Object Standard Uniclass 2015 A dynamic and unified classification system for the construction industry covering all sectors Construction Information Service (CIS) A comprehensive online collection of construction related standards, regulations, technical advice and articles Plug-ins NBS provides a range of tools to help connect your CAD model to your specification model
Platform Resources Support Events About TheNBS.com Manufacturers Uniclass 2015 Get in touch

Platform

NBS Chorus Features and pricing Book a demonstration Sign in to NBS Chorus Other tools National BIM Library Uniclass 2015 Construction Information Service (CIS) Plug-ins

Resources

Knowledge Sample Specification Case studies Authors

Support

Training Downloads and updates

About

About NBS Newsroom

Platform

NBS Chorus Features and pricing Book a demonstration Sign in to NBS Chorus Other tools National BIM Library Uniclass 2015 Construction Information Service (CIS) Plug-ins

Resources

Knowledge Sample Specification Case studies Authors

Support

Training Downloads and updates

About

About NBS Newsroom

Recommendation ITU-T K20 Resistibility of telecommunication equipment installed in a telecommunications centre to overvoltages and overcurrents

Publication Year

2018

Document Status

Withdrawn

Abstract

Specifies resistibility requirements and test procedures for telecommunication equipment that is attached to or installed within a telecommunication centre.

Document History

Superseded by the 11/2019 edition. Supersedes the 2011 edition.

Publisher Information

International Telecommunication Union

ITU is the United Nations specialized agency for information and communication technologies, responsible for allocating global radio spectrum and satellite orbits, developing technical standards to ensure network and technologies' interconnectivity, and works to improve access to ICTs to underserved communities worldwide.

Place des Nations
1211 Geneva 20
ITU
Switzerland

Website: https://www.itu.int
Email: itumail@itu.int
Tel: +41 22 730 5111