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ITU-T G.657 (11/2016)
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ITU-T G.657 (11/2016)
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用于接入网的弯曲损耗不敏感单模光缆的特性
在全球范围内,宽带接入网使用的通用传输网正在迅速发展。这些技术之一是能够提供大容量传输媒体以满足高速和宽带服务发展需求的单模光纤技术。 根据网络要求敷设并运行单模光纤和光缆方面的经验很多,描述其特性的ITU-T G.652建议书适用于这些经验。尽管如此,在光接入网内的特定用法会对光纤和光缆增加种种改进其最佳性能特性的要求。与一般传送网的用法不同的主要原因在于接入网内的网络分配和引入光缆的密度大。有限的空间和大量的操作处理,要求运营商友好的光纤性能和低弯曲敏感性。另外,也要改进在空间有限、拥挤的电信局站内布缆的方法。但是,通用传统网络的某些领域亦空间有限,在这些领域弯曲式的优化布线具有优势。ITU-T G.657建议书的目标是提出与现有ITU-T G.652单模光纤和光缆相比,弯曲性能有大幅改进的建议,以为优化提供支持。实现此目标的方式是引入两类单模光纤。一种是A类,它与ITU-T G.652单模光纤完全匹配,并且也能部署在通用传输网及接入网。另一种是B类,它未必与ITU-T G.652匹配,但是,在很小的弯曲半径能有小的微弯损耗值,主要用于建筑物内或附近的建筑物(例如建筑物外部的垂直主干布线)。这些B类光纤在接入网中与ITU-T G.657.A(和ITU-T G.652.D)的系统匹配。
ITU-T G.657建议书的第四版,针对所有应用(接入网及通用传输网)修改了A类光纤的使用方式,使用了弯曲特性得以改善的ITU-T G.652.D光纤。
Citation:
https://handle.itu.int/11.1002/1000/13078
Series title:
G series: Transmission systems and media, digital systems and networks
G.600-G.699: Transmission media and optical systems characteristics
G.650-G.659: Optical fibre cables
Approval date:
2016-11-13
Approval process:
AAP
Status:
Superseded
Observation:
The file initially posted on 13 February 2017 was replaced on 11 May 2017 to update the History section.
Maintenance responsibility:
ITU-T Study Group 15
Further details:
Patent statement(s)
Development history
[
7 related work items in progress
]
Editions
Related Supplement(s)
Related technical papers and reports
Ed.
ITU-T Recommendation
Status
Summary
Table of Contents
Download
5
G.657 (08/2024)
In force
here
-
here
4
G.657 (11/2016)
Superseded
here
here
here
3
G.657 (10/2012)
Superseded
here
here
here
2.1
G.657 (2009) Amd. 1 (06/2010)
Superseded
here
here
here
2
G.657 (11/2009)
Superseded
here
here
here
1
G.657 (12/2006)
Superseded
here
here
here
ITU-T Supplement
Title
Status
Summary
Table of contents
Download
G Suppl. 4 (12/1972)
Certain methods of avoiding the transmission of excessive noise between interconnected systems
In force
-
-
here
G Suppl. 5 (10/1984)
Measurement of the load of telephone circuits under field conditions
In force
-
-
here
G Suppl. 7 (12/1972)
Loss-frequency response of channel-translating equipment used in some countries for international circuits
In force
here
here
here
G Suppl. 8 (12/1972)
Method proposed by the Belgian telephone administration for interconnection between coaxial and symmetric pair systems
In force
-
-
here
G Suppl. 17 (10/1984)
Group-delay distortion performance of terminal equipment
In force
-
-
here
G Suppl. 19 (10/1984)
Digital crosstalk measurement (method used by the Administrations of France, the Netherlands and Spain)
In force
-
-
here
G Suppl. 22 (10/1984)
Mathematical models of multiplex signals
In force
-
-
here
G Suppl. 26 (10/1984)
Estimating the signal load margin of FDM wideband amplifier equipment and transmission systems
In force
-
-
here
G Suppl. 27 (10/1984)
Interference from external sources
In force
-
-
here
G Suppl. 28 (10/1984)
Application of transmultiplexers, FDM codecs, data-in-voice (DIV) systems and data-over-voice (DOV) systems during the transition from an analogue to a digital network
In force
-
-
here
G Suppl. 32 (11/1988)
Transfer of alarm information on 60-channel transmultiplexing equipment
In force
-
-
here
G Suppl. 34 (11/1988)
Temperature in underground containers for the installation of repeaters
In force
-
-
here
G Suppl. 35 (11/1988)
Guidelines concerning the measurement of wander
In force
-
-
here
G Suppl. 36 (11/1988)
Jitter and wander accumulation in digital networks
In force
-
-
here
G Suppl. 39 (02/2016)
Optical system design and engineering considerations
In force
here
here
here
G Suppl. 40 (07/2024)
Optical fibre and cable Recommendations and standards guideline
In force
here
-
here
G Suppl. 41 (07/2024)
Design guidelines for optical fibre submarine cable systems
In force
here
-
here
G Suppl. 42 (10/2018)
Guide on the use of the ITU-T Recommendations related to optical fibres and systems technology
In force
here
here
here
G Suppl. 43 (02/2011)
Transport of IEEE 10GBASE-R in optical transport networks (OTN)
In force
here
here
here
G Suppl. 44 (06/2007)
Test plan to verify B-PON interoperability
In force
here
here
here
G Suppl. 45 (09/2022)
Power conservation in optical access systems
In force
here
here
here
G Suppl. 46 (05/2009)
G-PON interoperability test plan between optical line terminations and optical network units
In force
here
here
here
G Suppl. 47 (09/2012)
General aspects of optical fibres and cables
In force
here
here
here
G Suppl. 48 (06/2010)
10-Gigabit-capable passive optical networks: Interface between media access control with serializer/deserializer and physical medium dependent sublayers
In force
here
here
here
G Suppl. 49 (09/2020)
Rogue optical network unit (ONU) considerations
In force
here
here
here
G Suppl. 50 (09/2011)
Overview of digital subscriber line Recommendations
In force
here
here
here
G Suppl. 51 (06/2017)
Passive optical network protection considerations
In force
here
here
here
G Suppl. 52 (09/2012)
Ethernet ring protection switching
In force
here
here
here
G Suppl. 53 (12/2014)
Guidance for Ethernet OAM performance monitoring
In force
here
here
here
G Suppl. 54 (07/2015)
Ethernet linear protection switching
In force
here
here
here
G Suppl. 55 (12/2023)
Radio-over-fibre (RoF) technologies and their applications
In force
here
here
here
G Suppl. 56 (02/2016)
OTN transport of CPRI signals
In force
here
here
here
G Suppl. 57 (07/2015)
Smart home profiles for 6LoWPAN devices
In force
here
here
here
G Suppl. 59 (02/2018)
Guidance on optical fibre and cable reliability
In force
here
here
here
G Suppl. 60 (09/2016)
Ethernet linear protection switching with dual node interconnection
In force
here
here
here
G Suppl. 62 (02/2018)
Gfast certification
In force
here
here
here
G Suppl. 64 (02/2018)
PON transmission technologies above 10 Gb/s per wavelength
In force
here
here
here
G Suppl. 65 (10/2018)
Simulations of transport of time over packet networks
In force
here
here
here
G Suppl. 66 (09/2020)
5G wireless fronthaul requirements in a passive optical network context
In force
here
here
here
G Suppl. 67 (07/2019)
Application of optical transport network Recommendations to 5G transport
In force
here
here
here
G Suppl. 68 (12/2023)
Synchronization operations, administration and maintenance requirements
In force
here
here
here
G Suppl. 69 (09/2020)
Migration of a pre-standard network to a metro transport network
In force
here
here
here
G Suppl. 70 (09/2020)
Supplement on sub 1 Gbit/s services transport over optical transport network
In force
here
here
here
G Suppl. 71 (12/2023)
Optical line termination capabilities for supporting cooperative dynamic bandwidth assignment
In force
here
here
here
G Suppl. 72 (04/2021)
Modelling consideration for optical media networks
In force
here
here
here
G Suppl. 73 (10/2021)
Influencing factors on quality of experience for multiview video (MVV) services
In force
here
here
here
G Suppl. 74 (12/2021)
Network slicing in a passive optical network context
In force
here
here
here
G Suppl. 75 (12/2021)
5G small cell backhaul/midhaul over TDM-PON
In force
here
here
here
G Suppl. 76 (12/2021)
Optical transport network security
In force
here
here
here
G Suppl. 77 (06/2022)
Supplement 77 to ITU-T G-series of Recommendations - Influencing factors on quality of experience (QoE) for video customized alerting tone (CAT) and video customized ringing signal (CRS) services
In force
here
here
here
G Suppl. 78 (09/2022)
Use case and requirements of fibre-to-the-room for small business applications
In force
here
here
here
G Suppl. 79 (12/2023)
Latency control and deterministic capability over a PON system
In force
here
here
here
G Suppl. 80 (07/2024)
Use case and requirements of fibre-based in-premises networking for home application (FIP4H)
In force
here
-
here
G Suppl. 81 (07/2024)
Practical aspects of PON security
In force
here
-
here
G Suppl. 82 (07/2024)
Enhanced optical line termination with information technology functions
In force
here
-
here
G Suppl. 83 (07/2024)
Supplement on the use of options in PTP profile with full timing support from the network
In force
here
-
here
Title
Approved on
Download
Optical fibres, cables and systems
2024
Roadmap for QoS and QoE in the ITU-T Study Group 12 context (TR-RQ)
2023
here
Optical fibre, cable, and components for space division multiplexing transmission
2022
here
Considerations on the use of GNSS as a primary time reference in telecommunications
2020
here
Use of G.hn in industrial applications
2020
here
Technical Report on Optical fibres, cables and systems
2015
here
Optical fibres, cables and systems
2009
here
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