| Performance requirements for passive optical nodes: Sealed closures for outdoor environments |
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Recommendation ITU-T L.201 refers to passive optical nodes in outdoor environments. It deals with the design of the closure housing as well as the fibre organizer or fibre management system, taking into account mechanical and environmental characteristics as well as the characteristics of the optical fibre organizer.
The following new elements have been added in this revision:
– A new clause 6.3 on closure materials with detailed test requirements for UV-light exposure and the fungal resistance of polymer materials and a material test requirement for the ageing of polymer materials by humidity;
– A new clause 6.5 on cable attachment and termination with recommendations for the electrical grounding of the metallic elements of the cables;
– A test programme for the performance evaluation of sealed optical closures in the outdoor ground level (OG) environment.
The following changes were made to harmonize the performance tests with [IEC 61753-1]:
– Sealing tests are done with 20 kPa overpressure for OG and outdoor above ground (OA) closures.
– Pass-fail criteria of pressure loss during test have been added to mechanical sealing tests for OG and OA closures.
– Reduced loads for the cable axial tension test for small diameter cables and microduct tubes.
– Reduced loads for the cable axial compression test for small diameter cables.
– The duration of the cycles in cable torsion and cable bending test have been added.
– The location for impact test has been added for rectangular shaped closures.
– The free fall test has been removed (it has been replaced by a more reproduceable shock test).
– In the assembly and disassembly test the duration is reduced to 5 cycles.
– Resistance to solvents and contaminating fluids: immersion in diesel with duration of 1 h and 24 h drying time and added immersion in petroleum jelly for 5 days has been added. Kerosene immersion has been removed.
– The duration of the change of temperature has been reduced to 12 cycles.
– Water immersion test at 1 m for 7 days for OG closures has been added. |
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| Citation: |
https://handle.itu.int/11.1002/1000/14636 |
| Series title: |
L series: Environment and ICTs, climate change, e-waste, energy efficiency; construction, installation and protection of cables and other elements of outside plant
L series: Environment and ICTs, climate change, e-waste, energy efficiency; construction, installation and protection of cables and other elements of outside plant
L.200-L.299: Optical infrastructures
L.200-L.249: Infrastructure including node elements (except cables) |
| Approval date: |
2021-05-29 |
| Approval process: | AAP |
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Status: |
In force |
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Maintenance responsibility: |
ITU-T Study Group 15 |
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Further details: |
Patent statement(s)
Development history
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ITU-T Supplement
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Title
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Status
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Summary
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Table of contents
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Download
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L Suppl. 4 (04/2016)
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Guidelines for developing a sustainable e-waste management system
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In force
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here
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here
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here
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L Suppl. 5 (12/2014)
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Life-cycle management of ICT goods
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In force
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here
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here
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here
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L Suppl. 20 (10/2015)
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Green public ICT procurement
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In force
|
here
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here
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here
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L Suppl. 21 (04/2016)
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Implementation guidance for small- and medium-sized enterprises on information and communication technology supply chain due diligence concerning conflict minerals
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In force
|
here
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here
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here
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L Suppl. 27 (10/2016)
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Supplement on success stories on e-waste management
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In force
|
here
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here
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here
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L Suppl. 28 (10/2016)
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Circular economy in information and communication technology; definition of approaches, concepts and metrics
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In force
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here
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here
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here
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L Suppl. 32 (10/2016)
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Supplement for eco-specifications and rating criteria for mobile phones eco-rating programmes
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In force
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here
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here
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here
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L Suppl. 33 (10/2016)
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Assessment of energy consumption of information and communication technology services
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In force
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here
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here
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here
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L Suppl. 41 (05/2021)
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Requirements on energy efficiency measurement models and the role of artificial intelligence and big data
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In force
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here
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here
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here
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L Suppl. 42 (05/2021)
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Guidelines on the environmental efficiency of machine learning processes in supply chain management
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In force
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here
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here
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here
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L Suppl. 43 (05/2021)
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Smart energy saving of 5G base stations: Traffic forecasting and strategy optimization of 5G wireless network energy consumption based on artificial intelligence and other emerging technologies
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In force
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here
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here
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here
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L Suppl. 44 (05/2021)
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Guidelines on best practices and environment friendly policies for effective information and communication technology deployment methods
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In force
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here
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here
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here
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L Suppl. 46 (12/2021)
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Definitions and recent trends in circular cities
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In force
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here
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here
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here
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L Suppl. 47 (07/2022)
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Examples of resource saving within the information and communication technology sector
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In force
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here
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here
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here
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L Suppl. 49 (07/2022)
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Overview on adaptation to climate change for information and communication technology networks
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In force
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here
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here
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here
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L Suppl. 52 (10/2022)
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Computer processing, data management and energy perspective
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In force
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here
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here
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here
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L Suppl. 53 (10/2022)
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Guidelines on the implementation of environmental efficiency criteria for artificial intelligence and other emerging technologies
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In force
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here
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here
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here
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L Suppl. 54 (10/2022)
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Guidance for assessing the greenhouse gas emissions consequences of the financial effects generated by information and communication technology
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In force
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here
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here
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here
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L Suppl. 55 (10/2022)
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Environmental efficiency and impacts on United Nations Sustainable Development Goals of data centres and cloud computing
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In force
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here
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here
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here
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L Suppl. 56 (10/2022)
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Guidelines for connecting cities and communities with the Sustainable Development Goals
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In force
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here
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here
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here
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| Title |
Approved on |
Download |
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Guide on the use of ITU-T L-series Recommendations related to optical technologies for outside plant
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2022
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here
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Guide on the use of ITU-T L-series Recommendations related to optical technologies for outside plant
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2020
|
here
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Partnering for solutions: ICTs in Smart Water Management
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2014
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here
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Resilient pathways: the adaptation of the ICT sector to climate change
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2014
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here
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Greening ICT Supply Chains – Survey on Conflict Minerals Due Diligence Initiatives
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2012
|
here
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Review of Mobile Handset Eco-Rating Schemes
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2012
|
here
|
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Boosting Energy Efficiency through Smart Grids
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2012
|
here
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