This ATIS Standard sets forth guidelines to assist the service providers, network designers, and system integrators in choosing appropriate electrical protection methods for G.fast communications circuits. It describes protector characteristics that may impact G.fast systems for outside plant, intra- and inter-building applications, and the services provided over these links. This document describes protectors in their non-operating state and their effect on these services and also considers the effects of protector response to a surge event and how that operation may affect these services. This is a subtending document and is intended to be used with the Broadband umbrella document ATIS-0600012, Electrical Protection Considerations for Broadband Systems.