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ITU-T Recommendations

Green ICT Standards and Supplements


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Rec. No.TitleSummaryStatusApproval Date
L.1000 Universal power adapter and charger solution for mobile terminals and other hand-held ICT devicesRecommendation 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.Approved2011-06-13
L.1001 External universal power adapter solutions for stationary information and communication technology devicesRecommendation 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 power adapters that are produced by widening their application by more devices, thus enabling their reuse and increasing their life expectancy. The solution also aims to reduce energy consumption. The longer the 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. Approved2012-11-29
L.1002 External universal power adapter solutions for portable information and communication technology devicesThis Recommendation ITU-T L.1002 defines requirements, and provides guidelines on environmental aspects, of universal power adapter solutions (UPA) designed for use with portable information and communication technology ICT devices. It is complementary to Recommendations ITU-T L.1000 and ITU-T L.1001 and aims to cover the widest possible range of ICT devices for portable use within identified voltage and power ranges. It firstly describes basic configurations of UPAs, consisting of a power adapter block with a detachable input cable and a detachable output cable to the ICT device. Then, it defines different general recommendations for UPAs and their interfaces, including cables, connectors, voltage, current, ripple noise, energy efficiency, no-load power, safety, electromagnetic compatibility, resistibility and eco-environmental specifications. All the recommendations have been set with the aim to reduce e-waste and increase usability.Consented / DeterminedNot yet approved
L.1005 Test suites for assessment of the universal charger solutionRecommendation ITU-T L.1005 considers the creation of specific test suites to assess certain functional aspects of the: energy efficiency, interworking, safety and electromagnetic compatibility (EMC) of the universal charger solution (UCS). Such testing is required to guarantee a minimum quality level of the UCS in conformance with the target basic configuration of the UCS and charger described in Recommendation ITU-T L.1000.Approved2014-02-13
L.1010 Green battery solutions for mobile phones and other hand-held information and communication technology devicesRecommendation ITU-T L.1010 defines a minimum set of parameters necessary to identify green battery solutions that should be considered by developers/manufacturers to reduce the future environmental impact of battery use. The provision of so-called green batteries is to extend the lifetime of handsets, reduce global resources consumption and preserve the environment. The compliance in terms of supporting green information and communication technology (ICT) efforts will be considered including the use of scarce resources, recycling and reuse. The existing environmental schemes available in different regions and international standards will be considered.Approved2014-02-13
L.1100 Procedure for recycling rare metals in information and communication technology goodsRecommendation 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.Approved2012-02-22
L.1101 Measurement methods to characterize rare metals in information and communication technology goodsInformation and communication technology (ICT) goods, which consist of many parts and modules, are comprised of relatively small quantities of rare metals and larger quantities of major materials (e.g., iron, nonferrous metals, plastics, glasses, and engineering ceramics). They are usually produced through complex production procedures. To achieve successful recycling systems, the rare metals information provided by manufacturers should be accurate. However, many measurement and characterization methods may be used to obtain information on rare metals for elements of ICT goods. Each method has its own intrinsic advantages and disadvantages in the analysis of the information of such elements. The element separation capabilities and quantitative resolutions differ according to the measurement methods used and there are no standardized measurement methods to define the quantities and qualities of rare metals. However, IEC 62321 provides some guidelines for X-ray fluorescence (XRF) and inductively coupled plasma mass spectrometry (ICP-MS) measurement methods to perform qualitative and quantitative analysis of unknown samples and harmful materials. Based on the guidelines of IEC 62321, Recommendation ITU-T L.1101 provides reference characterization procedures for efficient recycling of rare metals by using XRF and ICP-MS measurement methods.Approved2014-03-22
L.1102 Use of printed labels for communicating information on rare metals in information and communication technology goodsRecommendation ITU-T L.1102 describes printed label methods to provide information on rare metals contained in information and communication technology (ICT) goods, and includes requirements specified in Recommendations ITU-T L.1100 and ITU-T L.1101 on the disclosure of rare metals information to consumers and recyclers.Approved2016-07-14
L.1200 Direct current power feeding interface up to 400 V at the input to telecommunication and ICT equipmentRecommendation ITU-T L.1200 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.Approved2012-05-29
L.1201 Architecture of power feeding systems of up to 400 VDCRecommendation ITU-T L.1201 describes the architecture of power feeding systems of up to 400 VDC for information and communication technology (ICT) equipment in telecommunication centres, data centres and customer premises. It describes aspects such as configuration, redundancy, power distribution and monitoring, in order to construct safe, reliable and manageable power feeding systems. It can be used also as an architecture reference model for further Recommendations e.g., on the performance of DC power feeding systems.Approved2014-03-01
L.1202 Methodologies for evaluating the performance of an up to 400 VDC power feeding system and its environmental impactRecommendation ITU-T L.1202 is provided as a complement to Recommendation ITU-T L.1201, which describes the architecture of direct current (DC) power systems with an up to 400 VDC information and communication technology (ICT) equipment interface. The up to 400 VDC ICT equipment interface is described in Recommendation ITU-T L.1200. Recommendation ITU-T L.1202 provides a framework for assessing performances of up to 400 VDC power feeding systems and the savings incurred when compared to other power feeding systems such as the -48 VDC power system and the AC uninterruptable power system (UPS) commonly used in information and communication technology (ICT) sites. This Recommendation deals with performance factors such as efficiency, reliability/availability and environmental impact. Approved2015-04-22
L.1203 Colour and marking identification of up to 400 VDC power distribution for information and communication technology systemsThis Recommendation ITU-T L.1203 defines the requirements and guidelines for DC power distribution identification by colour and marking in Telecom/ICT installations (wire, cables, electric distribution boards, interconnections, etc…). It avoids confusion and errors between the different AC and DC power interfaces and distributions used in the building and inside Telecom/ICT systems, as 400VDC power feeding interface standardized in [ITU-T L.1200] is more used for many reasons among which, increased power density of ICT equipment, energy efficiency, simplified reliable power feeding architecture, costs optimisation. Recommendation ITU-T L.1203 is helping for a progressive introduction of up to 400VDC installations in cohabitation with existing -48V and AC distribution.Approved2016-02-22
L.1204 Extented architecture of power feeding systems of up to 400 VDCRecommendation ITU-T L.1204 describes the extended architecture of power feeding systems of up to 400 volts DC (VDC) for information and communication technology (ICT) equipment in telecommunication centres, data centres and customer premises. It describes aspects such as configuration, redundancy, power distribution and monitoring, in order to construct safe, reliable and manageable power feeding systems. This Recommendation can be used also as an architecture reference model for future Recommendations e.g. on the performance of DC power feeding systems. This Recommendation describes extended power feeding architectures using up to 400 VDC e.g. hybrid redundant DC and AC power feeding based on Recommendation ITU-T L.1201. Approved2016-06-29
L.1300 Best practices for green data centresRecommendation 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.Approved2014-06-29
L.1301 Minimum data set and communication interface requirements for data centre energy managementRecommendation ITU-T L.1301 establishes a minimum data set necessary to manage data centres and telecommunication rooms in an environmentally responsible manner. The Recommendation specifies the communication interface and defines the parameters to be communicated depending on the equipment used in data centres, such as power systems (alternating current (AC)/direct current (DC) and uninterruptible power supply (UPS) and energy distribution), cooling systems and information and communication technology (ICT) equipment. Approved2015-05-07
L.1302 Assessment of energy efficiency on infrastructure in data centres and telecom centresRecommendation ITU-T L.1302 contains the energy efficiency assessment methodology for data centre and telecom centre, test equipment accuracy requirements, assessment period, assessment conditions and calculation methods. For data centre and telecom centre, it was divided into assessment methods for whole data centre /telecom centre efficiency and partial data centre/telecom centre. As main energy consuming infrastructure in data centre/telecom centre are power feeding system (power supply system) and cooling system, both system energy efficiency measurement methodologies are covered in this Recommendation. It will take advantage of methodologies and best practices currently in used or in development in networks and data centre/telecom centre. This recommendation aimed at reducing the negative impact of data centre and telecom centre through providing the methodologies of energy efficiency assessment. It is commonly recognized that data centre and telecom centre will have an ever-increasing impact on the environment in the future. The application of the assessment methods defined in this Recommendation can help owners and managers to build future data centres/telecom centres, or improve existing ones, to operate in an environmentally responsible manner. Approved2015-11-29
L.1310 Energy efficiency metrics and measurement methods for telecommunication equipmentRecommendation 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. Energy efficiency metrics and measurement methods are defined for telecommunication network equipment and small networking equipment. These metrics allow for the comparison of equipment within the same class, e.g., equipment using the same technologies. The comparison of equipment in different classes is out of the scope of this Recommendation.Approved2014-08-22
L.1320 Energy efficiency metrics and measurement for power and cooling equipment for telecommunications and data centresRecommendation ITU-T L.1320 contains the general definition of metrics, test procedures, methodologies and measurement profiles required to assess the energy efficiency of power and cooling equipment for telecommunications and data centres. More detailed measurement procedures and specifications can be developed in future related ITU-T Recommendations. Metrics and measurement methods are defined for power equipment, alternating current (AC) power feeding equipment (such as AC uninterruptible power supply (UPS), direct current (DC/AC) inverters), DC power feeding equipment (such as AC/DC rectifiers, DC/DC converters), solar equipment, wind turbine equipment and fuel cell equipment. In addition, metrics and measurement methods are defined for cooling equipment such as air conditioning equipment, outdoor air cooling equipment and heat exchanging cooling equipment.Approved2014-03-22
L.1321 Reference operational model and interface for improving energy efficiency of ICT network hostsRecommendation ITU-T L.1321 describes a reference operational model and interface for improving energy efficiency of ICT network hosts. The operational model and interface specify network proxy operation to support IPv4 ARP and DHCP in order to promote the deployment of network proxy.Approved2015-03-01
L.1330 Energy efficiency measurement and metrics for telecommunication networksRecommendation ITU-T L.1330 provides a set of metrics for the assessment of energy efficiency (EE) of telecommunication (TLC) mobile networks, together with proper measurement methods. Such metrics are of extremely high importance to operators, given that the optimization of the energy performance of a single piece of equipment does not guarantee the overall maximum energy efficiency of a complex network formed by several interconnected equipments. Hence, through the metrics reported in this Recommendation, a better comprehension of network energy efficiency will be gained, not only for "total" networks, but also for "partial" networks, definable through either geographic or demographic boundaries. In a future step, energy efficiency of TLC fixed networks will be provided. Approved2015-03-01
L.1340 Informative values on the energy efficiency of telecommunication equipmentRecommendation ITU-T L.1340 provides informative values on the energy efficiency of different types of telecommunication network equipment and small networking equipment in use in both the fixed and mobile networks. These values are related to energy efficiency metrics, test procedures, methodologies and measurement profiles that have been defined in Recommendation ITU-T L.1310. These informative values are intended to be a valued reference resource for those in the process of choosing the most energy-efficient technologies for network upgrade and deployment and, in so doing, reducing the carbon footprint of the Information and Communication Technology (ICT) sector.Approved2014-02-13
L.1350 Energy efficiency metrics of base station siteRecommendation ITU-T L.1350 contains basic definitions of energy efficiency metrics, to evaluate the energy efficiency of a base station site including the energy consumption for: " All the telecom equipment inside the base station site. " The entire infrastructure, including cooling systems, monitoring systems (for power consumption, equipment running status, environment parameters, etc.), fire protection and lighting systems for all the sites. " Energy losses due to AC/DC rectifiers, generator and cable losses. The following energy factors will be considered for the evaluation: " electric energy from a public grid " full consumption of the generator for emergency purposes " renewable energy including local or dedicated grid power. Measurement methodologies for the parameters considered in the metrics proposed are contained in other ITU-T Recommendations of the same series. Consented / DeterminedNot yet approved
L.1400 Overview and general principles of methodologies for assessing the environmental impact of information and communication technologiesRecommendation 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: • Assessment of the environmental impact of ICT goods, networks, and services • Assessment of the environmental impact of ICT projects • Assessment of the environmental impact of ICT in organizations • Assessment of the environmental impact of ICT in cities • Assessment of the environmental impact of ICT in countries or group of countries. This Recommendation also provides some examples of opportunities to reduce the environmental load due to ICT.Approved2011-02-22
L.1410 Methodology for environmental life cycle assessments of information and communication technology goods, networks and servicesRecommendation ITU-T L.1410 deals with environmental life cycle assessments (LCAs) of information and communication technology (ICT) goods, networks and services. It is organized in two parts: • Part I: ICT life cycle assessment: framework and guidance • Part II: "Comparative analysis between ICT and 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. Part II deals with comparative analysis based on LCA results of an ICT goods, networks and services product system, and a reference product system.Approved2014-12-07
L.1420 Methodology for energy consumption and greenhouse gas emissions impact assessment of information and communication technologies in organizationsRecommendation 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.Approved2012-02-06