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ITU-T Recommendations

Green ICT Standards and supplements


This webpage provides references to the latest ITU-T Recommendations on ICTs, the environment and climate change.
ITU-T L.1000: Universal power adapter and charger solution for mobile terminals and other hand-held ICT devices Download here Recommendation ITU-T L.1000 provides high level requirements for a universal power adapter and charger solution that will reduce the number of power adapters and chargers produced and recycled by widening their application to more devices and increasing their lifetime. The solution also aims to reduce energy consumption. The longer life cycle and possibility of avoiding device duplication reduces the demand on raw materials and waste. The universal power adapter and charger solution is designed to serve the vast majority of mobile terminals and other ICT devices. 13 June 2011
ITU-T L.1001: External universal power adapter solutions for stationary information and communication technology devices ​Download here ​Recommendation ITU-T L.1001 provides requirements for a universal power adapter solution (UPA) for stationary information and communication technology (ICT) devices that will reduce the number of produced power adapters by widening their application to more devices, enabling their reuse and increasing their lifetime. The solution also aims to reduce energy consumption. The longer life cycle and possibility of avoiding device duplication reduces the demand on raw materials and limits the amount of e-waste. The universal power adapter solution for stationary ICT equipment is designed to serve the vast majority of ICT devices. ​29 November 2012
ITU-T L.1100: Procedure for recycling rare metals in information and communication technology goods Download here ​Recommendation ITU-T L.1100 provides information on the recycling procedures of rare metals in information and communication technology (ICT) goods. It also defines a communication format for providing recycling information of rare metals contained in ICT goods.
​22 February 2012
ITU-T L.1200: Direct current power feeding interface up to 400 V at the input to telecommunication and ICT equipment Download here ​This Recommendation specifies the direct current (DC) interface between the power feeding system and ICT equipment connected to it. It also describes normal and abnormal voltage ranges, and immunity test levels for ICT equipment to maintain the stability of telecommunication and data communication services. The specified interface is operated from a DC power source of up to 400 V to allow increased power consumption and equipment power density, in order to obtain higher energy efficiency and reliability with less material usage than using a lower voltage such as -48 VDC or AC UPS power feeding solutions. ​29 May 2012
ITU-T L.1300: Best practices for green data centres Download here ​Recommendation ITU-T L.1300 describes best practices aimed at reducing the negative impact of data centres on the climate. It is commonly recognized that data centres will have an ever-increasing impact on the environment in the future. The application of the best practices defined in this Recommendation can help owners and managers to build future data centres, or improve existing ones, to operate in an environmentally responsible manner. Such considerations will strongly contribute to a reduction in the impact of the information and communication technology (ICT) sector on climate change. ​29 November 2011
ITU-T L.1310: Energy efficiency metrics and measurement methods for telecommunication equipment ​​Download here ​Recommendation ITU-T L.1310 contains the definition of energy efficiency metrics test procedures, methodologies and measurement profiles required to assess the energy efficiency of telecommunication equipment. Metrics and measurement methods are defined for telecommunication network equipment and small networking equipment. These metrics allow for comparisons of equipments within the same class e.g. equipments using the same technologies. Comparisons of equipments in different classes are out of the scope of this Recommendation. ​6 November 2012
ITU-T L.1310: Supplement on energy efficiency for telecommunication equipment Download here This Supplement on energy efficiency for telecommunication equipment reviews the concepts for energy efficiency in application to networking devices; it presents a concept of place in a network as a base for classification, describes a process for creating a single metric for energy efficiency which reflects the qualities of equipment scalability with traffic levels and provides testing topologies and traffic pattern descriptions. ​7 February 2013
ITU-T L.1400: Overview and general principles of methodologies for assessing the environmental impact of information and communication technologies Download here ​Recommendation ITU-T L.1400 presents the general principles on assessing the environmental impact of information and communication technologies (ICT) and outlines the different methodologies that are being developed: This Recommendation also provides some examples of opportunities to reduce the environmental load due to ICT. ​22 February 2011
ITU-T L.1410: Methodology for the assessment of the environmental impact of information and communication technology goods, networks and services Download here ​Recommendation ITU-T L.1410 deals with the assessment of the environmental impact of information and communication technology (ICT) goods, networks and services. It is organized in two parts:
Part I (clause 5) – ICT life cycle assessment: framework and guidance.
Part II (clause 6) – Comparative analysis between ICT and a reference product system (baseline scenario); framework and guidance.
Part I deals with the life cycle assessment (LCA) methodology applied to ICT goods, networks and services (ICT GNS). Part II deals with comparative analysis based on LCA results of an ICT GNS product system and a referenced product system.
​8 March 2012
ITU-T L.1420: Methodology for energy consumption and greenhouse gas emissions impact assessment of information and communication technologies in organizations Download here ​This Recommendation provides specific guidance on energy and greenhouse gas (GHG) impacts.
Recommendation ITU-T L.1420 presents the methodology to be followed if an organization intends to claim compliance with this Recommendation when assessing its information and communication technology (ICT) related energy consumption and/or greenhouse gas (GHG) emissions.
This Recommendation can be used to assess energy consumption and GHG emissions generated over a defined period of time for the following purposes: for assessment of related impact from ICT organizations or for assessment of impact from ICT related activities within non-ICT organizations.
​6 February 2012