The ITU-T G.984 series recommendation describes a flexible optical fiber access network capable of supporting the bandwidth requirements of business and residential services and covers systems with nominal line rates of 2.4 Gbps in the downstream direction and 1.2 Gbps and 2.4 Gbps 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.
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