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ITU-T Recommendation G.984 is a family of recommendations that defines gigabit passive optical networks (GPON) for telecommunications access networks. The first version was ratified in 2003. The most recent version comprises four recommendations:
- G.984.1, Gigabit-capable Passive Optical Networks (GPON): General characteristics, 2008, with amendment 1 (2009) and 2 (2012)
- G.984.2, GPON: Physical Media Dependent (PMD) layer specification, 2003, with amendment 1 (2006) and 2 (2008).
- G.984.3, G-PON: Transmission convergence layer specification, 2008, with amendments 1 (2009), 2 (2009), 3 (2012) and erratum 1 (2010).
- G.984.4, G-PON: ONT management and control interface (OMCI) specification, 2008, with amendments 1 (2009), 2 (2009), 3 (2010), erratum 1 (2009), corrigendum 1 (2010), and an implementer's guide (2009).
- G.984.5 Enhancement Band, 2007, with amendment 1 (2009) Coexistence with future WDM PON technology on the same medium.
- G.984.6 Gigabit-capable passive optical networks (GPON): Reach extension (2008), with amendment 1 (2009) and 2 (2012)
- G.984.7 Gigabit-capable passive optical networks (GPON): Long reach (2010)
The GPON OMCI recommendation G.984.4 draws on G.983.2, which defines the BPON management model. However, G.984.4 removed all references to ATM. G.988 is a stand-alone OMCI recommendation and supersedes G.984.4 except for G-PON specifics that are not defined in G.988. Future work on the PON management model is expected to appear only in the GPON space.