This Recommendation describes 1 Gbit/s point-to-point Ethernet based optical access system for the optical access services including Optical Distribution Network (ODN) specification@ physical layer specification and Operation@ Administration and Maintenance (OAM) specification. For an effective use of optical fibres cited in [ITU-T G.985]@ this Recommendation specifies only a single fibre bi-directional transmission system@ dual-fibre systems being out of the scope of this Recommendation. This Recommendation describes the case of a single domain managed ONT and related OLT requirements. The case of a dual domain managed ONT and related OLT requirements are for future study.