The paper deals with the impact of the quality of service of the electric distribution networks on the newgeneration telecommunication network, which provide the main Italian towns with ultra-broadband services.Telecom Italia has adopted the fibre to the cabinet architecture for its ultra-broadband services, involvingtens of thousands of active nodes installed in street cabinets, initially powered through remote DC feedingfrom Telecom central stations. The increased push towards ultra-broadband coverage requires more energyhungry equipment so feeding from local electrical distribution network has been adopted.

The paperaddresses in particular the evaluation and characterization of sequence of voltage dips, which could disruptthe service to clients through the reboot of the ultra-broadband devices installed in the street cabinets, inorder to acquire useful input to set a suitable compensation strategy for them (short term storage devices,including super-capacitors), to compensate the most frequent voltage disturbances. The engineering solutionadopted by Telecom Italia is based on both the results of RSE statistical analysis and the supplyrequirements/capabilities of telecom devices to bepowered.