272 ITU‐T's Technical Reports and Specifications interoperability, management, and response of these systems across the demand and operational range. Some reference values for the metrics defined in ITU‐T are available in L.1340: \"Informative values on the energy efficiency of telecommunication equipment27\". The growing demand for Internet connections from both governments and citizens is driving the rapid increase in worldwide deployment of broadband and ultra‐broadband networks. Depending on the specific geographic, demographic and economic conditions, such networks can be either fixed (based on FTTx architectures and implementing technologies such as ADSL, ADSL2plus, VDSL2, GPON, GEPON, etc.) or mobile (based on HSPA, LTE, UMTS, etc.). The increasing deployment of broadband and ultra‐broadband networks has a real impact on energy consumption and, in more general terms, on the carbon footprint. To address the critical issue of energy efficiency, it is essential that particular attention be given to the choice of specific technologies during the planning phase. An informed choice of available energy‐efficient telecommunication equipment is fundamental to reducing energy consumption while guaranteeing the desired level of quality of service (QoS) and reliability. Recommendation ITU‐T L.1340 provides informative values on the energy efficiency of different types of telecommunication network equipment and small networking equipment used in both the fixed and mobile networks. Informative values for digital subscriber line access multiplexer (DSLAM), multi‐service access code (MSAN) and optical line termination (OLT) equipment28: This clause defines the informative values with respect to the energy efficiency metrics defined for the specific technologies used by DSLAM, MSAN and OLT equipment. More precisely, this clause covers the: DSLAM equipment and MSAN equipment implementing ADSL2plus, VDSL2 and POTS technologies. OLT equipment implementing the gigabit passive optical network (GPON), gigabit Ethernet passive optical network (GEPON) and point‐to‐point (PtP) technologies. For these equipment typologies, the most commonly used metric is the Pport, which considers the number of ports at a fixed load as a functional unit. Where: PEQ is the power (in Watts) of a fully equipped wireline network equipment with all its line cards working in a specific profile or state (e.g., all VDSL2 subscriber lines in L0 state, all ADSL2plus ____________________ 27 Recommendation 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. 28 ITU‐T L.1340 \"Informative values on the energy efficiency of telecommunication equipment\"