1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T L.207 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (03/2018) SERIES L: ENVIRONMENT AND ICTS, CLIMATE CHANGE, E-WASTE, ENERGY EFFICIENCY; CONSTRUCTION, INSTALLATION AND PROTECTION OF CABLES AND OTHER ELEMENTS OF OUTSIDE P
2、LANT Optical infrastructures Infrastructure including node elements (except cables) Passive node elements with automated ID tag detection Recommendation ITU-T L.207 ITU-T L-SERIES RECOMMENDATIONS ENVIRONMENT AND ICTS, CLIMATE CHANGE, E-WASTE, ENERGY EFFICIENCY; CONSTRUCTION, INSTALLATION AND PROTECT
3、ION OF CABLES AND OTHER ELEMENTS OF OUTSIDE PLANT OPTICAL FIBRE CABLES Cable structure and characteristics L.100L.124 Cable evaluation L.125L.149 Guidance and installation technique L.150L.199 OPTICAL INFRASTRUCTURES Infrastructure including node elements (except cables) L.200L.249 General aspects a
4、nd network design L.250L.299 MAINTENANCE AND OPERATION Optical fibre cable maintenance L.300L.329 Infrastructure maintenance L.330L.349 Operation support and infrastructure management L.350L.379 Disaster management L.380L.399 PASSIVE OPTICAL DEVICES L.400L.429 MARINIZED TERRESTRIAL CABLES L.430L.449
5、 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T L.207 (03/2018) i Recommendation ITU-T L.207 Passive node elements with automated ID tag detection Summary With the fast growth of fibre to the x (FTTx), rapid deployment and effective maintenance of a new passive fi
6、bre cable network i.e., optical distribution network (ODN) have become major challenges for telecommunications network operators. The global communications industry has been developing passive node elements with automated identifier (ID) tag detection to enable automated information collection on op
7、tical fibre connectivity for more efficient installation, operation and maintenance of optical fibre networks. Recommendation ITU-T L.207 focuses on hardware aspects of this type of passive node element and to describe the general features, characterization and performance specifications for node el
8、ements with automated ID tag detection, including environmental conditions, functional requirements, performance requirements, and mechanical and electrical or optical interface requirements. A product characterization checklist is included in an appendix. History Edition Recommendation Approval Stu
9、dy Group Unique ID* 1.0 ITU-T L.207 2018-03-16 15 11.1002/1000/13567 Keywords automated ID tag detection, optical fibre connectivity, passive fibre cable network. * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendati
10、ons unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T L.207 (03/2018) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telec
11、ommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization A
12、ssembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology
13、which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance wit
14、h this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory
15、language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTSITU draws attention to the possibility that the practice or implementation of th
16、is Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the dat
17、e of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult
18、 the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2018 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T L.207 (03/2018) iii Table of Contents Page 1 Scope . 1 2 References . 1 3 Definition
19、s 1 3.1 Terms defined elsewhere 1 3.2 Terms defined in this Recommendation . 1 4 Abbreviations and acronyms 2 5 Conventions 2 6 Background . 2 7 Deployment (environment) conditions . 3 7.1 Installed product . 3 7.2 Transport and storage . 3 7.3 Installation or intervention . 3 8 Functional requireme
20、nts . 3 8.1 Base functionalities 3 8.2 Functionalities concerning automated ID tag detection . 3 9 Automated ID tag detection performance requirements . 4 9.1 Resource information acquisition time . 4 9.2 Port state change response time 4 9.3 Alarm information reporting time 5 9.4 Port reading succe
21、ss rate 5 9.5 Power dissipation 5 10 Mechanical and electrical or optical interface requirements 5 Appendix I Performance evaluation criteria . 7 I.1 Mechanical performance evaluation . 7 I.2 Optical evaluation . 7 Appendix II Performance test programme 9 II.1 Introduction 9 II.2 Mechanical and opti
22、cal evaluation . 9 II.3 Electrical evaluation . 10 Appendix III Product characterization checklist . 11 Bibliography. 14 Rec. ITU-T L.207 (03/2018) 1 Recommendation ITU-T L.207 Passive node elements with automated ID tag detection 1 Scope This Recommendation addresses the general features, character
23、ization and performance requirements for passive node elements with identifier (ID) tag detection that supports automatic information collection on fibre connectivity. This Recommendation focuses on both indoor and outside plant deployment conditions and includes: functional requirements; automated
24、ID tag detection performance requirements; mechanical and electrical or optical interface requirements. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publica
25、tion, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the
26、currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T L.200 Recommendation ITU-T L.200/L.51 (2003), Passive node elements for fibre optic networks General
27、 principles and definitions for characterization and performance evaluation. ITU-T L.202 Recommendation ITU-T L.202/L.50 (2010), Requirements for passive optical nodes: Optical distribution frames for central office environments. ITU-T L.361 Recommendation ITU-T L.361/L.64 (2012), ID tag requirement
28、s for infrastructure and network elements management. 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the terms defined in ITU-T L.202, ITU-T L.200, and ITU-T L.361. 3.2 Terms defined in this Recommendation This Recommendation defines the following terms: 3.2.1 electrical interfac
29、e: The interface used to exchange information with the management system in real time online transactions through a data network. The interface should be based on a standard network interface, such as the Ethernet. 3.2.2 management system: Network system with an architecture that encompasses functio
30、nal modules for data collection, node management, fibre network and work order management. The operation support systems/business support systems (OSSs/BSSs) and other applications related to fibre infrastructure management provide various applications through a management system to a user who wants
31、 to use fibre infrastructure more efficiently. 2 Rec. ITU-T L.207 (03/2018) 3.2.3 fibre infrastructure management (FIM) tool: A personal digital assistant (PDA), a laptop personal computer (PC) or a smartphone with specialized software for use by a field operator or installer to access identifier (I
32、D) tag information and communicate with the management system. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: BSS Business Support System E Extreme EI Electrical Interface FIM Fibre Infrastructure Management FTTx Fibre To The x (curb/building/home) IC
33、 Indoor temperature Controlled ID Identification Data IN Indoor Non-temperature controlled ME Multiple Element MS Management System ODN Optical Distribution Network OI Optical Interface OPGW Optical Power Ground Wire OS Outdoor underground Sub-terrain OSS Operation Support System PC Personal Compute
34、r PDA Personal Digital Assistant SC Single Circuit SE Single Element SF Single Fibre SR Single Ribbon SNMP Simple Network Management Protocol 5 Conventions None. 6 Background With the fast growth of FTTx, management of a new passive fibre cable network i.e., optical distribution network (ODN) effici
35、ently and accurately has become a major issue and challenge for operators. The global communications industry has been developing passive node elements in which each port has the capability of automated ID tag detection when an optical fibre connector with an ID tag is inserted into a port to enable
36、 automated information collection on optical fibre connection. Rec. ITU-T L.207 (03/2018) 3 This Recommendation addresses passive node elements with automated ID tag detection capability along with the environmental conditions, functional requirements, performance requirements, and mechanical and el
37、ectrical or optical interface requirements. 7 Deployment (environment) conditions In addition to the optical functionality of the node in the network, performance requirements and test severity should also reflect the environmental conditions to which a product is exposed during its lifecycle. 7.1 I
38、nstalled product The conditions for an installed product should comply with the conditions for passive optical nodes (see clause 7.1 of ITU-T L.200) except for the OS (i.e., outdoor underground sub-terrain) environmental class. 7.2 Transport and storage The conditions for transport and storage shoul
39、d comply with the conditions for passive optical nodes (see clause 7.2 of ITU-T L.200). 7.3 Installation or intervention The conditions for installation or intervention should comply with the conditions for passive optical nodes (see clause 7.3 of ITU-T L.200). 8 Functional requirements In general,
40、passive node elements with ID tag detection should comply with the functional requirements defined in ITU-T L.200. In addition, they should also meet the functional requirements related to automated ID tag detection. 8.1 Base functionalities The node elements should comply with the functional requir
41、ements defined in clause 6 of ITU-T L.200. 8.2 Functionalities concerning automated ID tag detection The node elements should meet the functional requirements specified in 8.2.1 to 8.2.8 concerning ID tag detection. 8.2.1 Identifying each optical connector with unique ID information about the ID tag
42、 The ID information about each ID tag is universally unique, and is attached to identify each optical connector, including the optical connector of the pigtail and the patch cord. The ID tag should be changed or replaced without interrupting the optical signal transmission through the related optica
43、l fibre. 8.2.2 Reading and conditionally writing ID information from or to an ID tag The purpose of automated ID tag detection is to track and verify fibre connectivity, by reading the ID information from the ID tag when the fibre connector attached with the ID tag is inserted into a related port. A
44、dditionally, it should support writing ID information to the ID tag via the ports, and the writing operation should be implemented under control to assure the accuracy of the information. 8.2.3 Port management The automated ID tag detection for node elements is implemented by port management. When a
45、 fibre connector attached with the ID tag is inserted into a port, the port senses the change of port status to 4 Rec. ITU-T L.207 (03/2018) implement automated ID tag detection. Moreover, some additional functions associated with ID tag detection should be supported to facilitate the automated ID t
46、ag detection. a) Monitoring and indicating the port status including idle and occupied, sensing the change of port status when a fibre connector attached with ID tag is inserted into or drawn out of a port. b) Indicating the target port into which a fibre connector is to be inserted. c) Associated p
47、ort with ID information, which is the source to verify the correct fibre connectivity. d) Initiating reading and writing ID information when it is initiated manually or a fibre connector is inserted into a port. 8.2.4 Storage of information about the port and ID tags The element node should support
48、the storage of information about the port and ID tags, including the status of the port and the associations between the ports and ID tags. Then it can check whether unexpected changes of the optical fibre connectors and ports occur. 8.2.5 Alarm management Based on the capability of automated ID tag
49、 detection, monitoring the fibre connectivity is a critical function. The node elements should support indicating unexpected events, e.g., an unexpected fibre connector is inserted into or drawn out of a port. 8.2.6 Resource data collection In order to improve the efficiency of resource data collection, the node element should support resource data collection including the port status and ID information when it is initiated manually. 8.2.7 Visual field operation guidance In order to improve the accuracy and efficie
