Summary

Recommendation ITU-T G.987.2 describes a flexible optical fibre access network capable of supporting the bandwidth requirements of business and residential services, and covers one type of 10‑Gigabit‑capable passive optical network (XG-PON) system with asymmetric nominal line rate of 9.95328 Gbit/s in the downstream direction and 2.48832 Gbit/s in the upstream direction, hereinafter referred to as XG-PON1.

This Recommendation describes the physical layer requirements and specifications for the XG-PON physical media dependent (PMD) layer, together with XG-PON reach extender boxes and wavelength enhancement band for XG-PON. The transmission convergence (TC) layer and ONT management are described in other Recommendations in the ITU-T G.987.x-series of Recommendations. The control interface (OMCI) specifications are described in the ITU‑T G.987.x‑series of Recommendations.

This Recommendation describes a system that represents an evolutionary development from the systems described in the ITU-T G.984 series. To the greatest extent possible, this Recommendation maintains the requirements of Rec. ITU-T G.984.1 to ensure maximal continuity with existing systems and optical fibre infrastructure.