Summary

This Recommendation describes a flexible optical fibre access network capable of supporting the bandwidth requirements of business and residential services and covers systems with nominal line rates of 1.2 Gbit/s and 2.4 Gbit/s in the downstream direction and 155 Mbit/s, 622 Mbit/s, 1.2 Gbit/s and 2.4 Gbit/s in the upstream direction. Both symmetrical and asymmetrical (upstream/downstream) Gigabit-capable Passive Optical Network (GPON) systems are described. This Recommendation proposes the general characteristics for GPON based on operators' service requirements.

This Recommendation aims to improve on the G.983.1 system by reconsidering a supporting service, security policy, nominal bit-rate, and so on. In order to insure maximal continuity with existing systems and optical fibre infrastructure, this Recommendation maintains some requirements of ITU-T Rec. G.983.1.