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 G.870/Y.1352 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (11/2016) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital networks Optical transport networks SERIES Y: GLOBAL INFORMATION INFRASTR
2、UCTURE, INTERNET PROTOCOL ASPECTS, NEXT-GENERATION NETWORKS, INTERNET OF THINGS AND SMART CITIES Internet protocol aspects Transport Terms and definitions for optical transport networks Recommendation ITU-T G.870/Y.1352 ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS A
3、ND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS G.100G.199 GENERAL CHARACTERISTICS COMMON TO ALL ANALOGUE CARRIER-TRANSMISSION SYSTEMS G.200G.299 INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON METALLIC LINES G.300G.399 GENERAL CHARACTERISTICS OF INTERNATIONAL C
4、ARRIER TELEPHONE SYSTEMS ON RADIO-RELAY OR SATELLITE LINKS AND INTERCONNECTION WITH METALLIC LINES G.400G.449 COORDINATION OF RADIOTELEPHONY AND LINE TELEPHONY G.450G.499 TRANSMISSION MEDIA AND OPTICAL SYSTEMS CHARACTERISTICS G.600G.699 DIGITAL TERMINAL EQUIPMENTS G.700G.799 DIGITAL NETWORKS G.800G.
5、899 General aspects G.800G.809 Design objectives for digital networks G.810G.819 Synchronization, quality and availability targets G.820G.829 Network capabilities and functions G.830G.839 SDH network characteristics G.840G.849 Management of transport network G.850G.859 SDH radio and satellite system
6、s integration G.860G.869 Optical transport networks G.870G.879 DIGITAL SECTIONS AND DIGITAL LINE SYSTEM G.900G.999 MULTIMEDIA QUALITY OF SERVICE AND PERFORMANCE GENERIC AND USER-RELATED ASPECTS G.1000G.1999 TRANSMISSION MEDIA CHARACTERISTICS G.6000G.6999 DATA OVER TRANSPORT GENERIC ASPECTS G.7000G.7
7、999 PACKET OVER TRANSPORT ASPECTS G.8000G.8999 ACCESS NETWORKS G.9000G.9999 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T G.870/Y.1352 (11/2016) i Recommendation ITU-T G.870/Y.1352 Terms and definitions for optical transport networks Summary Recommendation ITU-T
8、G.870/Y.1352 provides terms, definitions and abbreviations used in optical transport network (OTN) Recommendations. In this edition, Recommendations (namely Source Recommendation per term) are identified that originally introduced OTN terms and are primarily responsible for the definitions of those
9、terms. For the OTN terms defined in the previous edition, this edition provides the pointers to the Sources Recommendations as a directory. Official definitions are now given in those Source Recommendations. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T G.870/Y.1352 2004-0
10、6-13 15 11.1002/1000/7337 1.1 ITU-T G.870/Y.1352 (2004) Amd. 1 2005-06-29 15 11.1002/1000/7338 2.0 ITU-T G.870/Y.1352 2008-03-29 15 11.1002/1000/9375 2.1 ITU-T G.870/Y.1352 (2008) Amd.1 2009-11-13 15 11.1002/1000/10402 3.0 ITU-T G.870/Y.1352 2010-07-29 15 11.1002/1000/10879 4.0 ITU-T G.870/Y.1352 20
11、12-02-13 15 11.1002/1000/11492 5.0 ITU-T G.870/Y.1352 2012-10-29 15 11.1002/1000/11789 5.1 ITU-T G.870/Y.1352 (2012) Cor. 1 2013-08-29 15 11.1002/1000/11985 6.0 ITU-T G.870/Y.1352 2016-11-13 15 11.1002/1000/13085 Keywords Directory, optical transport network, OTN, source recommendation, terminology,
12、 terms. _ * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T G.870/Y.1352 (11/2016) FOREWORD The International Telecommunication
13、 Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questio
14、ns and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations o
15、n 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 which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the
16、 expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or app
17、licability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with
18、 the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTSITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applica
19、bility of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had notreceived notice of intellectual property, protected by patents, which may be required to implemen
20、t this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2017 All rights reserved. No part of this publication may be reproduced, by any means
21、 whatsoever, without the prior written permission of ITU. Rec. ITU-T G.870/Y.1352 (11/2016) iii Table of Contents Page 1 Scope . 1 2 References . 1 3 Definitions 2 3.1 Terms defined elsewhere 2 3.2 Terms previously defined in this Recommendation . 4 Rec. ITU-T G.870/Y.1352 (11/2016) 1 Recommendation
22、 ITU-T G.870/Y.1352 Terms and definitions for optical transport networks 1 Scope This Recommendation contains a listing of the terms that are broadly used in the Recommendations associated with optical transport networks (OTNs). In the previous editions, ITU-T G.870 collected and defined major OTN t
23、erms. In this edition, the Recommendations that originally introduced and primarily describe those OTN terms are identified as the Source Recommendation. From this revision, the Source Recommendations are primarily responsible for the definitions of those terms. Official definitions are now provided
24、 by those Source Recommendations. For those OTN terms defined in the previous edition, this edition of ITU-T G.870 provides the pointers to the Source Recommendations as a directory. Some terms that were defined in the previous editions are now widely used in a general sense and there is no identifi
25、ed need to define them. Some terms are obsolete and are not recommended to be used. Abbreviations and acronyms, which the previous editions listed, are not included in this edition. It should be noted that the terms contained in this edition are based on the previous edition and are not exhaustive i
26、n OTN terminology. Directory document and/or service that indicate(s) the source Recommendations per OTN term are under study. OTN terms specific to synchronization or physical layer characteristics are not a part of this Recommendation. 2 References The following ITU-T Recommendations and other ref
27、erences contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to in
28、vestigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the 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
29、status of a Recommendation. ITU-T G.694.1 Recommendation ITU-T G.694.1 (2012), Spectral grids for WDM applications: DWDM frequency grid. ITU-T G.709 Recommendation ITU-T G.709/Y.1331 (2016), Interfaces for the optical transport network. ITU-T G.780 Recommendation ITU-T G.780/Y.1351 (2010), Terms and
30、 definitions for synchronous digital hierarchy (SDH) networks. ITU-T G.798 Recommendation ITU-T G.798 (2012), Characteristics of optical transport network hierarchy equipment functional blocks. ITU-T G.800 Recommendation ITU-T G.800 (2016), Unified functional architecture of transport networks. ITU-
31、T G.801.1 Recommendation ITU-T G.801.1/Y.1307 (2016), Ethernet service characteristics. 2 Rec. ITU-T G.870/Y.1352 (11/2016) ITU-T G.805 Recommendation ITU-T G.805 (2000), Generic functional architecture of transport networks. ITU-T G.806 Recommendation ITU-T G.806 (2009), Characteristics of transpor
32、t equipment Description methodology and generic functionality. ITU-T G.808 Recommendation ITU-T G.808 (2016), Terms and definitions for network protection and restoration. ITU-T G.872 Recommendation ITU-T G.872 (2016), Architecture of optical transport networks. ITU-T G.874 Recommendation ITU-T G.87
33、4 (2013), Management aspects of optical transport network elements. ITU-T G.7044 Recommendation ITU-T G.7044/Y.1347 (2011), Hitless adjustment of ODUflex(GFP). ITU-T G.7710 Recommendation ITU-T G.7710/Y.1701 (2007), Common equipment management function requirements. ITU-T G.7712 Recommendation ITU-T
34、 G.7712/Y.1703 (2008), Architecture and specification of data communication network. ITU-T G.8201 Recommendation ITU-T G.8201 (2011), Error performance parameters and objectives for multi-operator international paths within the optical transport network. ITU-T M.3010 Recommendation ITU-T M.3010 (200
35、0), Principles for a telecommunications management network. ITU-T M.3013 Recommendation ITU-T M.3013 (2000), Considerations for a telecommunications management network. ITU-T X.700 Recommendation ITU-T X.700 (1992), Management framework for Open Systems Interconnection (OSI) for CCITT applications.
36、3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 adaptation: ITU-T G.805. 3.1.2 adaptation function: ITU-T G.806. 3.1.3 adapted information: ITU-T G.805. 3.1.4 administrative domain: ITU-T G.805. 3.1.5 atomic function: ITU-T G.806. 3.1.6
37、 automatic protection switching (APS): ITU-T G.780. 3.1.7 block: ITU-T G.780. 3.1.8 characteristic information (CI): ITU-T G.805. 3.1.9 connection: ITU-T G.805. 3.1.10 connection function (C): ITU-T G.806. 3.1.11 connection point (CP): ITU-T G.806. 3.1.12 connection supervision: ITU-T G.805. Rec. IT
38、U-T G.870/Y.1352 (11/2016) 3 3.1.13 data communications channel (DCC): ITU-T G.780. 3.1.14 defect: ITU-T G.806. 3.1.15 errored block (EB): ITU-T G.780. 3.1.16 embedded communication channel (ECC): ITU-T G.7712. 3.1.17 failure: ITU-T G.806. 3.1.18 fault: ITU-T G.806. 3.1.19 function: ITU-T G.806. 3.1
39、.20 layer: ITU-T G.780. 3.1.21 link connection: ITU-T G.805. 3.1.22 managed object: ITU-T X.700. 3.1.23 management application function (MAF): ITU-T G.780. 3.1.24 management information (MI): ITU-T G.806. 3.1.25 member: ITU-T G.806. 3.1.26 message communication function: ITU-T M.3013. 3.1.27 multipl
40、ex section (MS): ITU-T G.780. 3.1.28 multiplex section overhead (MSOH): ITU-T G.780. 3.1.29 network: ITU-T G.805. 3.1.30 network connection (NC): ITU-T G.805. 3.1.31 network element: ITU-T M.3010. 3.1.32 network element function (NEF): ITU-T M.3010. 3.1.33 network node interface (NNI): ITU-T G.780.
41、3.1.34 operations systems function (OSF): ITU-T M.3010. 3.1.35 path: ITU-T G.806. 3.1.36 path overhead (POH): ITU-T G.780. 3.1.37 process: ITU-T G.806. 3.1.38 reference point: ITU-T G.780. 3.1.39 section: ITU-T G.806. 3.1.40 signal degrade (SD): ITU-T G.806. 3.1.41 signal fail (SF): ITU-T G.806. 3.1
42、.42 subnetwork: ITU-T G.805. 3.1.43 subnetwork connection (SNC): ITU-T G.805. 3.1.44 synchronous transport module (STM): ITU-T G.780. 3.1.45 telecommunications management network: ITU-T M.3010. 3.1.46 trail: ITU-T G.805. 3.1.47 trail termination function (TT): ITU-T G.806. 4 Rec. ITU-T G.870/Y.1352
43、(11/2016) 3.2 Terms previously defined in this Recommendation The previous editions of this Recommendation defined the following terms. The latest definitions are now given in the Recommendations associated with the terms as below. Some terms are now widely used in a general sense and there is no id
44、entified need to define them. Some terms are obsolete and are not recommended to be used. 3.2.1 1+1 (protection) architecture: ITU-T G.808. 3.2.2 1:n (protection) architecture (n 1): ITU-T G.808. 3.2.3 (1:1)n protection architecture: ITU-T G.808. 3.2.4 access function (AC): ITU-T G.798. 3.2.5 active
45、 transport entity: ITU-T G.808. 3.2.6 adaptation management: Widely used in a general sense. 3.2.7 APS-byte pass-through: ITU-T G.808. 3.2.8 APS channel: ITU-T G.808. 3.2.9 APS protocol: 1-phase: ITU-T G.808. 3.2.10 APS protocol: 2-phase: ITU-T G.808. 3.2.11 APS protocol: 3-phase: ITU-T G.808. 3.2.1
46、2 bridge: ITU-T G.808. 3.2.12.1 permanent bridge: ITU-T G.808. 3.2.12.2 broadcast bridge: ITU-T G.808. 3.2.12.3 selector bridge: ITU-T G.808. 3.2.13 CBRx: ITU-T G.798. 3.2.14 CBR2G5: Refer to the description in ITU-T G.798. 3.2.15 CBR10G: Refer to the description in ITU-T G.709. 3.2.16 CBR40G: Refer
47、 to the description in ITU-T G.709. 3.2.17 central frequency: Refer to the description in ITU-T G.694.1. 3.2.18 clear (CLR): ITU-T G.808. 3.2.19 clear lockout of normal traffic signal #i: ITU-T G.808. 3.2.20 connection monitoring end-point (CMEP): ITU-T G.709. 3.2.21 connectivity supervision: Widely
48、 used in a general sense. 3.2.22 continuity supervision: Widely used in a general sense. 3.2.23 crossing APS-bytes: ITU-T G.808. 3.2.24 detection time: ITU-T G.808. 3.2.25 do not revert normal traffic signal #i (DNR #i): ITU-T G.808. 3.2.26 effective frequency slot: ITU-T G.872. 3.2.27 end-to-end ov
49、erhead/OAM (e): Widely used in a general sense. 3.2.28 entity: Widely used in a general sense. 3.2.29 escalation: Widely used in a general sense. 3.2.30 exercise signal #i (EX): ITU-T G.808. Rec. ITU-T G.870/Y.1352 (11/2016) 5 3.2.31 extra traffic signal: ITU-T G.808. 3.2.32 forced switch for extra traffic signal (FS #ExtraTrafficSignalNumber):
