General

The present document describes the principles for powering of Telecommunications Equipment (TE) in access 
networks (both traditional copper based and Next Generation fibre and/or hybrid based) and contains requirements for 
the powering systems, laying down: 
• the characteristics of the input and output interfaces of the power units; the recommendations for TE power 
protection, also regarding network integrity and public services availability requirements; 
• the management data, necessary to guarantee the required availability of the network and provided public 
services and to ensure the maintenance of the TE power units. 
The present document takes into account the innovative characteristics of fibre-based access network equipment and 
considers the intrinsic limitations of local power plants and power distribution when ICT equipment is installed inside 
telecom centre, local exchanges, street cabinets or inside buildings: it goes from "complete integration of the power 
plant in the TE" to "remote power feeding from a distant power plant". 
The present document provides detailed information in annex A on the improved reliability of public electric power grid 
and on the improved reliability and availability of new fibre-based NGA network. It should be considered that, for street 
cabinet TE, the local power scenario is common, and, in that case, the main power supply availability characteristics are 
mainly based on electrical energy provider's performance. 
The present document applies to the powering of all equipment of the access network (copper, fibre or radio networks) 
located inside or outside telecommunications centres or local exchanges, differentiating the applicable and sustainable 
power protection requirements. The access network is defined as the part of the telecommunications network, which 
comprises the network termination (passive or active) that is installed inside customer premises and the first exchange 
that can be also the broadband local exchange.