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Work item:
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G.9804.3 (2021) Amd.3
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Subject/title:
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50-Gigabit-capable passive optical networks (50G-PON): Physical media dependent (PMD) layer specification - Amendment 3
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Status:
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Consented on 2025-10-24 [Issued from previous study period]
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Approval process:
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AAP
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Type of work item:
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Recommendation
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Version:
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-
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Equivalent number:
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-
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Timing:
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2025-10 (No priority specified)
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Liaison:
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-
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Supporting members:
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-
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Summary:
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Recommendation ITU-T G.9804.3 describes a 50-Gigabit-capable passive optical network (50G PON) system in an optical access network for residential, business, mobile backhaul and other applications. This system operates over a point-to-multipoint optical access infrastructure at the nominal line rate of 50 Gbit/s in the downstream direction. In the upstream direction, 25 Gbit/s and 50 Gbit/s nominal line rates are defined. This Recommendation contains the references, the common definitions, acronyms, abbreviations and the specifications of the physical media dependent layer of the 50G-PON system.
Amendment 1 defines a third upstream wavelength "option 3" to support triple WDM coexistence with both GPON and XG(S)-PON, optical interface parameters of 50 Gbit/s upstream direction, optical interface parameters for non-MPM use cases, and the ONU out-of-band power spectral density requirements.
Amendment 2 defines the optical interface parameters of 50 Gbit/s upstream direction on further power budget classes besides N1 class.
Amendment 3 deprecates 12.44Gbit/s upstream line rate, defines several more power budgets specifications for the non-MPM use cases, applies narrow band wavelength option for 50G upstream in Option 2, and updates the OPL encoding.
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Comment:
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-
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Reference(s):
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Historic references:
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Contact(s):
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| ITU-T A.5 justification(s): |
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First registration in the WP:
2024-10-01 14:38:51
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Last update:
2025-10-28 13:58:31
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