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ITU-T Recommendations

Green ICT Standards and Supplements


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Rec. No.TitleSummaryStatusApproval Date
L Suppl. 1 ITU-T L.1310 – Supplement on energy efficiency for telecommunication equipmentTelecommunication technologies play a large and increasing role in modern society; we depend increasingly on constant streams of information in our work and free time for data access and entertainment. Every day, more people access high speed networks via wired and wireless channels, and the amount of energy to deliver all those new services is also growing rapidly. Without an increase of energy efficiency, this would lead to a dramatic increase in energy use for all new services and customers. Scaling existing technological solutions is not enough. Not only do we need to implement changes in energy efficiency but we also have to implement them rapidly. 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. Approved2013-02-07
L Suppl. 2 ITU-T L.1410 – Case studiesSupplement 2 to ITU-T L-series Recommendations has been developed to provide examples to assess the life cycle environmental impact of ICT goods, networks and services (GNS) based on Recommendation ITU-T L.1410. This Supplement focuses on illustrating the results of reduced greenhouse gas (GHG) emissions that have been achieved through increased efficiency in ICT services. These results represent a small number of the many examples that are expected to supplement Recommendation ITU-T L.1410 in the future. This Supplement is intended for implementers and organizations developing ICT services, and persons responsible for the deployment of sustainable ICT services, including office workers, policy makers and those in academia.Approved2013-12-13
L Suppl. 3 ITU-T L.1430 – Guidance on practical application of ITU-T L.1430 to a real-time navigation serviceThe real-time navigation service (RNS) is composed of satellite navigation system-based software which provides real-time information of the optimal route to the destination according to traffic conditions throughout the travel as well as the available parking spaces nearby. The transport sector is expected to save on energy consumption by adopting RNS. Based on the experiences from a Korean study, Supplement 3 to the L-series Recommendations describes how to indirectly estimate energy consumption reduction and greenhouse gas (GHG) abatement potential related to RNS. Future revisions may look into direct estimation methods. This Supplement is bounded to Recommendation ITU-T L.1430, but gives further guidance on boundary setting, GHG accounting and baseline scenario development, and on measurement, verification and monitoring methods from the information and communication technology (ICT) based RNS project perspective. Whereas Recommendation ITU-T L.1430 focuses on the net environmental impact of ICT services from the entire life cycle perspective, this Supplement describes only the environmental impact of RNS during the use stage compared to one in a baseline scenario.Approved2013-12-13
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 devicesRecommendation ITU-T L.1002 defines the requirements, and provides guidelines on the 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. Approved2016-10-14
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.1006 Test suites for assessment of the external universal power adapter solutions for stationary information and communication technology devicesRecommendation ITU-T L.1006 describes the general test suites applicable to the universal power adapter solution (UPA) designed for ICT devices for stationary (non-portable) use defined in Recommendation ITU-T L.1001. It considers the creation of specific test suites to assess certain functional aspects of the energy efficiency, interworking, safety and electromagnetic compatibility (EMC) of universal power adapter solution (UPA) designed for ICT devices for stationary (non portable) use. Such testing is required to guarantee a minimum quality level of the universal charging solution (UCS) in conformance with the target basic configuration of UPA described in Recommendation ITU-T L.1001. With regard to electromagnetic compatibility (EMC) and safety aspects, additional requirements to those listed in Recommendation ITU-T L.1001 are necessary for a product to be available for use by the general public.Approved2016-12-14
L.1007 Test suites for assessment of the external universal power adapter solutions for portable information and communication technology devicesRecommendation ITU-T L.1007 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 power adapter (UPA) solution designed for information and communication technology (ICT) devices for portable use. Such testing is required to guarantee a minimum quality level of the UPA in conformance with the target basic configuration of the UPA described in Recommendation ITU-T L.1002.Approved2016-12-14
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.1020 Circular economy: Guide for operators and suppliers on approaches to migrate towards circular ICT goods and networksThis Recommendation suggests approaches of circular economy (CE) for information and communication technology (ICT) goods and networks. It focuses particularly on the next steps in improving circularity in the operators' supply chain. The Recommendation provides a guide on how operators could work with their supply chain to improve CE aspects for ICT goods and networks but it does not provide metrics. The objective of the guide is to provide options to improve circularity and to enable operators and their suppliers to create business models for the promotion of circular networks for an optimum solution that uses all the loops of circularity - from sharing to recycling. Approved2018-01-13
L.1021 Extended producer responsibility - Guidelines for sustainable e-waste managementThis Recommendation offers a description of the extended producer responsibility (EPR) system in dealing with e-waste. It expands on the different existing forms of EPR globally, not only in theoretical terms, but also with a practical view on their feasibility, challenges and pre-requisites. It presents the definition of the EPR system, in addition to the roles and responsibilities of the different stakeholders, the different types of EPR as well as how and why they could be used in certain contexts and not in others. The funding mechanism behind every mode and the organizational structure expected to be in place are also presented. The Recommendation concludes with many best practices from the international arena including developed, developing and emerging economies, as well as the challenges faced in some cases. Approved2018-04-06
L.1030 E-waste management framework for countriesRecommendation ITU-T L.EWFrame provides a management framework for e- waste to countries. The document includes in a summarized way the different steps that countries need to adopt in order to put in place an e-waste management system. The different steps of the e waste management system described in the document are and will be further elaborated in detailed Recommendations. In addition, the document provides highlights concerning the environmental cost of improper handling of e-waste as well as the economic opportunities that could emerge from the sustainable management of e- waste.Approved2018-06-13
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 buildings and inside Telecom/ICT systems, as 400VDC power feeding interfaces standardized in [ITU-T L.1200] is used more, increasing power density of ICT equipment, energy efficiency, simplified reliable power feeding architecture, costs optimisation, etc. Recommendation ITU-T L.1203 assists the progressive introduction of up to 400VDC installations in cohabitation with the existing -48V and AC distribution.Approved2016-02-22
L.1204 Extended 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.1205 Interfacing of renewable energy or distributed power sources to up to 400 VDC power feeding systemsThe up to 400 volt DC (VDC) power solutions feeding the power interface of ICT/telecom equipment as defined by the ITU-T L.1200 series, are well adapted to the straightforward use of renewable energy or distributed power sources through new simple direct current (DC) nano or micro grids. Recommendation ITU-T L.1205 defines the coupling of local or remote renewable energy into an up to 400 VDC power system without reducing DC performances defined in Recommendation ITU-T L.1202 mainly for efficiency and reliability. The main advantages are saving of fossil fuel (as a source of primary energy consumption), reduction of greenhouse gas (GHG) emissions and increased resilience. Additional site interconnection by a DC grid can even bring more optimization. One other big benefit is that compared to alternating current (AC), with 400 VDC there is no synchronization required between the various inputs, which keeps the architecture simple.Approved2016-12-14
L.1206 Impact on ICT equipment architecture of multiple AC, -48VDC or up to 400 VDC power inputsRecommendation ITU-T L.1206 discusses multiple power supply interfaces to ICT equipment operated by dual power input feeds with combination of standardized -48 V direct current, alternating current source or direct current source up to 400 V interfaces. Operational voltage and interface characteristics are detailed in ITU-T Recommendations and ETSI relevant standards. It also includes some details on the power architecture within the ICT equipment between the ICT power interface and the ICT end load. Approved2017-07-29
L.1207 Progressive migration of a telecommunication/information and communication technology site to 400 VDC sources and distribution Recommendation ITU-T L.1207 gives explanation, requirements and guidance for boosting the spread of up to 400 V direct current (400 VDC) power systems and distribution to information and communication technology (ICT) equipment. It includes 400 VDC remote powering up to 400 VDC of distributed ICT equipment, the option of interconnection of local renewable energy sources and their connection to DC power nanogrids and other users, extending the resilience capability of the telecommunications network and ICT sites to grid failures and climate change.Approved2018-05-14
L.1220 Innovative energy storage technology for stationary use - Part 1: Overview of energy storageWith the increase of new technologies of energy storage there is need for a global overview of an energy storage system for use in stationary information and communication technology (ICT) installation in network, data centre and customer premises equipment (CPE), and simple evaluation of acceptable duration and characterization methods for this specific purpose. This Recommendation introduces an open series of documents for different families of technologies (battery systems, super-capacitor systems, etc.) that will be enriched progressively as new technologies emerge that may have a possible significant impact in the field of energy storage. Identified parts of the Recommendation series innovative energy storage technology for stationary use are: - Part 1: Overview of energy storage - Part 2: Battery - Part 3: Super-capacitor technology Approved2017-08-13