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ITU-T G.709/Y.1331 (2020) Amd. 2 (02/2022)

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Recommendation ITU-T G.709/Y.1331 defines the requirements for the optical transport network (OTN) interface signals of the optical transport network, in terms of:
– OTN hierarchy
– functionality of the overhead in support of multi-wavelength optical networks
– frame structures
– bit rates
– formats for mapping client signals.
Edition 6.3 of this Recommendation adds specifications for OTUk, k=0, references to specific bit patterns that may appear in Status and Payload Type overhead fields during the presence of the FlexO Squelch text pattern [ITU-T G.709.1], a clarification of the ODU Locked maintenance signal and an enhancement of the introductory text in Annex L.
Citation: https://handle.itu.int/11.1002/1000/14894
Series title: G series: Transmission systems and media, digital systems and networks
  G.700-G.799: Digital terminal equipments
  G.700-G.709: General
Y series: Global information infrastructure, Internet protocol aspects, next-generation networks, Internet of Things and smart cities
  Y.1000-Y.1999: Internet protocol aspects
  Y.1300-Y.1399: Transport
Approval date: 2022-02-13
Approval process:AAP
Status: In force
Maintenance responsibility: ITU-T Study Group 15
Further details: Patent statement(s)
Development history