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Work item:
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G.989.3 (2021) Amd.2
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Subject/title:
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40-Gigabit-capable passive optical networks (NG-PON2): Transmission convergence layer specification - Amendment 2
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Status:
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Consented on 2025-03-28 [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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2025-03 (Medium priority)
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Liaison:
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-
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Supporting members:
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Verizon, Calix, Futurewei, Nokia
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Summary:
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Recommendation ITU-T G.989.3 specifies the transmission convergence layer of 40 Gigabit-capable passive optical network (NG-PON2) systems providing optical access for residential, business, mobile backhaul and other applications.
An NG-PON2 system supports multiple wavelength channels and enables flexibility to add capacity as the demand grows to 100 Gbit/s and beyond. An NG-PON2 system may contain a set of time and wavelength division multiplexing (TWDM) channels, or a set of point-to-point wavelength division multiplexing (PtP WDM) channels, or both. The TWDM channels operate at the nominal line rates of 9.95328 and 2.48832 Gbit/s in both downstream and upstream directions. The PtP WDM channels support nominal line rate classes of 1.25 Gbit/s, 2.5 Gbit/s and 10 Gbit/s, depending on the PtP WDM client.
The transmission convergence (TC) layer is the protocol layer of the NG-PON2 system that is positioned between the physical media dependent (PMD) layer and service clients. It builds on Recommendation ITU‑T G.987.3, with modifications for NG-PON2 specific features.
This Recommendation forms an integral part of the ITU-T G.989 series of Recommendations (ITU‑T G.989, ITU-T G.989.1 and ITU-T G.989.2) that, together with the ONU management and control interface (OMCI) Recommendation, ITU-T G.988, specifies a coherent set of access transmission systems. The NG-PON2 system is also a member of the ITU-T G.9802 family.
Amendment 2 to ITU-T Recommendation G.989.3(2021) implements the TC layer consistency updates across the ITU-T PON specifications and provides routine maintenance fixes.
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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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First registration in the WP:
2024-10-01 14:28:11
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Last update:
2025-04-09 14:49:39
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