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.997.1 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 1 (12/2017) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital sections and digital line system Metallic access networks Physical
2、 layer management for digital subscriber line transceivers Amendment 1 Recommendation ITU-T G.997.1 (2016) Amendment 1 ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS G.100G.199 GENERAL CHARACTERISTICS COMMO
3、N 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 CARRIER TELEPHONE SYSTEMS ON RADIO-RELAY OR SATELLITE LINKS AND INTERCONNECTION WITH METALLIC LINES G.
4、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.899 DIGITAL SECTIONS AND DIGITAL LINE SYSTEM G.900G.999 General G.900G.909 Parameters for optical fib
5、re cable systems G.910G.919 Digital sections at hierarchical bit rates based on a bit rate of 2048 kbit/s G.920G.929 Digital line transmission systems on cable at non-hierarchical bit rates G.930G.939 Digital line systems provided by FDM transmission bearers G.940G.949 Digital line systems G.950G.95
6、9 Digital section and digital transmission systems for customer access to ISDN G.960G.969 Optical fibre submarine cable systems G.970G.979 Optical line systems for local and access networks G.980G.989 Metallic access networks G.990G.999 MULTIMEDIA QUALITY OF SERVICE AND PERFORMANCE GENERIC AND USER-
7、RELATED ASPECTS G.1000G.1999 TRANSMISSION MEDIA CHARACTERISTICS G.6000G.6999 DATA OVER TRANSPORT GENERIC ASPECTS G.7000G.7999 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.997.1 (2016)/Amd.
8、1 (12/2017) i Recommendation ITU-T G.997.1 Physical layer management for digital subscriber line transceivers Amendment 1 Summary Recommendation ITU-T G.997.1 specifies the physical layer management for asymmetric digital subscriber line (ADSL) and very high speed digital subscriber line 2 (VDSL2) t
9、ransmission systems. It specifies means of communication on a transport transmission channel defined in the physical layer Recommendations ITU-T G.992.1, ITU-T G.992.2, ITU-T G.992.3, ITU-T G.992.4, ITU-T G.992.5 and ITU-T G.993.2. It specifies network elements (NE) content and syntax for configurat
10、ion, fault and performance management. The revision of this Recommendation includes the management information base (MIB) elements for the physical layer management of Recommendation ITU-T G.993.2 and additional MIB elements for the physical layer management of Recommendations ITU-T G.992.3 and ITU-
11、T G.992.5. The 2016 edition of this Recommendation integrates ITU-T G.997.1 (2012) and all its amendments and corrigenda; it did not add any new technical material. Amendment 1 includes: Management parameters for the support of G.993.5 Annex B (Vectored Long Reach VDSL) and ITU-T G.993.2 Annex D (Un
12、vectored Long Reach VDSL) Management parameters for the support of G.993.5 Annex A (Mitigating strong FEXT) Add missing parameter INM_INPEQ_FORMAT for the support of INM in ITU-T G.993.2. ii Rec. ITU-T G.997.1 (2016)/Amd.1 (12/2017) History Edition Recommendation Approval Study Group Unique ID* 1.0
13、ITU-T G.997.1 1999-07-02 15 11.1002/1000/4723 2.0 ITU-T G.997.1 2003-05-22 15 11.1002/1000/6283 2.1 ITU-T G.997.1 (2003) Amd. 1 2003-12-14 15 11.1002/1000/7081 2.2 ITU-T G.997.1 (2003) Amd. 2 2005-01-13 15 11.1002/1000/7492 3.0 ITU-T G.997.1 2005-09-06 15 11.1002/1000/8550 4.0 ITU-T G.997.1 2006-06-
14、06 15 11.1002/1000/8768 4.1 ITU-T G.997.1 (2006) Cor. 1 2006-12-14 15 11.1002/1000/8994 4.2 ITU-T G.997.1 (2006) Amd. 1 2006-12-14 15 11.1002/1000/8995 4.3 ITU-T G.997.1 (2006) Amd. 2 2007-11-22 15 11.1002/1000/9168 4.4 ITU-T G.997.1 (2006) Amd. 3 2008-08-22 15 11.1002/1000/9389 5.0 ITU-T G.997.1 20
15、09-04-22 15 11.1002/1000/9676 5.1 ITU-T G.997.1 (2009) Cor. 1 2009-11-13 15 11.1002/1000/10417 5.2 ITU-T G.997.1 (2009) Amd. 1 2010-06-11 15 11.1002/1000/10416 5.3 ITU-T G.997.1 (2009) Amd. 2 2010-11-29 15 11.1002/1000/11016 5.4 ITU-T G.997.1 (2009) Amd. 3 2011-06-22 15 11.1002/1000/11130 5.5 ITU-T
16、G.997.1 (2009) Cor. 2 2011-10-29 15 11.1002/1000/11397 5.6 ITU-T G.997.1 (2009) Amd. 4 2011-12-16 15 11.1002/1000/11398 5.7 ITU-T G.997.1 (2009) Amd. 5 2012-02-13 15 11.1002/1000/11504 6.0 ITU-T G.997.1 2012-06-13 15 11.1002/1000/11645 6.1 ITU-T G.997.1 (2012) Amd. 1 2012-12-07 15 11.1002/1000/11798
17、 6.2 ITU-T G.997.1 (2012) Amd. 2 2013-04-22 15 11.1002/1000/11893 6.3 ITU-T G.997.1 (2012) Amd. 3 2013-08-29 15 11.1002/1000/11996 6.4 ITU-T G.997.1 (2012) Amd. 4 2015-02-13 15 11.1002/1000/12374 6.5 ITU-T G.997.1 (2012) Amd. 5 2015-11-06 15 11.1002/1000/12566 6.6 ITU-T G.997.1 (2012) Amd. 6 2016-03
18、-29 15 11.1002/1000/12798 6.7 ITU-T G.997.1 (2012) Cor. 1 2016-11-13 15 11.1002/1000/13108 6.8 ITU-T G.997.1 (2012) Amd. 7 2017-12-07 15 11.1002/1000/13336 7.0 ITU-T G.997.1 2016-11-13 15 11.1002/1000/13346 7.1 ITU-T G.997.1 (2016) Amd. 1 2017-12-07 15 11.1002/1000/13514 _ * To access the Recommenda
19、tion, 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. Rec. ITU-T G.997.1 (2016)/Amd.1 (12/2017) iii FOREWORD The International Telecommunication Union (ITU) is the United
20、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 questions and issuing Recommendati
21、ons 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 on these topics. The approva
22、l 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 expression “Administration
23、“ 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 applicability) and compliance
24、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 the Recommendation is requ
25、ired 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 applicability of claimed Intellect
26、ual 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 received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However
27、, 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 2018 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior
28、 written permission of ITU. iv Rec. ITU-T G.997.1 (2016)/Amd.1 (12/2017) Table of Contents Page 1 Scope . 1 2 References . 1 3 Definitions 2 4 Abbreviations and acronyms 3 5 Overview . 6 5.1 Physical layer management mechanisms . 7 6 OAM communications channel 8 6.1 Requirements on the physical medi
29、a dependent (PMD) layer for the bit-oriented clear embedded operations channel (EOC) 9 6.2 Requirements on the PMD layer for the message-oriented clear EOC 10 6.3 Data link layer 10 6.4 The SNMP protocol 13 7 Management information base (MIB) elements . 15 7.1 Failures . 18 7.2 Performance monitorin
30、g functions . 20 7.3 Configuration functions 33 7.4 Inventory information . 72 7.5 Test, diagnostic and status parameters . 74 7.6 Network management elements partitioning 98 Appendix I Processing examples 143 I.1 Illustration of transmitter processing 143 I.2 Illustration of receiver processing 144
31、 Appendix II Downstream power back-off 145 II.1 Introduction 145 II.2 Description of the DPBO method . 146 Bibliography. 149 Rec. ITU-T G.997.1 (2016)/Amd.1 (12/2017) 1 Recommendation ITU-T G.997.1 Physical layer management for digital subscriber line transceivers Amendment 1 Editorial note: This is
32、 a complete-text publication. Modifications introduced by this amendment are shown in revision marks relative to Recommendation ITU-T G.997.1 (2016). 1 Scope This Recommendation specifies the physical layer management for asymmetric digital subscriber line (ADSL) and very high speed digital subscrib
33、er line 2 (VDSL2) transmission systems based on the usage of indicator bits and embedded operations channel (EOC) messages defined in the ITU-T G.992.x series of ITU-T Recommendations and in ITU-T G.993.2, and the clear embedded operations channel defined in this Recommendation. It specifies network
34、 management elements content for configuration, fault, and performance management. The mechanisms to provide operations, administration and maintenance (OAM) functions, and to generate OAM flows F1, F2 and F3, will depend on the transport mechanism of the physical layer transmission system as well a
35、s on the supervision functions contained within the physical layer termination functions of equipment. This Recommendation specifies only flow F3 transmission path level. For interrelationships of this Recommendation with other Recommendations of the ITU-T G.99x-series, see ITU-T G.995.1. 2 Referenc
36、es 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 publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users o
37、f 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 currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendati
38、on does not give it, as a stand-alone document, the status of a Recommendation. ITU-T G.992.1 Recommendation ITU-T G.992.1 (1999), Asymmetric digital subscriber line (ADSL) transceivers. ITU-T G.992.2 Recommendation ITU-T G.992.2 (1999), Splitterless asymmetric digital subscriber line (ADSL) transce
39、ivers. ITU-T G.992.3 Recommendation ITU-T G.992.3 (2005), Asymmetric digital subscriber line transceivers 2 (ADSL2). ITU-T G.992.4 Recommendation ITU-T G.992.4 (2002), Splitterless asymmetric digital subscriber line transceivers 2 (splitterless ADSL2). ITU-T G.992.5 Recommendation ITU-T G.992.5 (200
40、5), Asymmetric digital subscriber line (ADSL) transceivers Extended bandwidth ADSL2 (ADSL2plus). ITU-T G.993.2 Recommendation ITU-T G.993.2 (2011), Very high speed digital subscriber line transceivers 2 (VDSL2). 2 Rec. ITU-T G.997.1 (2016)/Amd.1 (12/2017) ITU-T G.993.5 Recommendation ITU-T G.993.5 (
41、2010), Self-FEXT cancellation (vectoring) for use with VDSL2 transceivers. ITU-T G.994.1 Recommendation ITU-T G.994.1 (2003), Handshake procedures for digital subscriber line (DSL) transceivers. ITU-T G.995.1 Recommendation ITU-T G.995.1 (2001), Overview of digital subscriber line (DSL) Recommendati
42、ons. ITU-T G.998.4 Recommendation ITU-T G.998.4 (2010), Improved impulse noise protection for DSL transceivers. ITU-T I.432.x Recommendations ITU-T I.432.x-series, B-ISDN user-network interface Physical layer specification. ITU-T I.610 Recommendation ITU-T I.610 (1999), B-ISDN operation and maintena
43、nce principles and functions. ITU-T T.35 Recommendation ITU-T T.35 (2000), Procedure for the allocation of ITU-T defined codes for non-standard facilities. IETF RFC 1157 IETF RFC 1157 (1990), A Simple Network Management Protocol (SNMP). 3 Definitions This Recommendation defines the following terms:
44、3.1 accumulation period: Period of time used by the network management system (NMS) to accumulate sufficient number of parameter samples. 3.2 anomaly: An anomaly is a discrepancy between the actual and desired characteristics of an item. The desired characteristic may be expressed in the form of a s
45、pecification. An anomaly may or may not affect the ability of an item to perform a required function. 3.3 bearer channel: As defined in the respective Recommendation (also referred to as “frame bearer“ in various digital subscriber line (DSL) Recommendations). 3.4 clear embedded operations channel (
46、EOC): An octet oriented data channel multiplexed in the physical layer transmission frame structure. 3.5 defect: A defect is a limited interruption in the ability of an item to perform a required function. It may or may not lead to maintenance action depending on the results of additional analysis.
47、Successive anomalies causing a decrease in the ability of an item to perform a required function are considered a defect. 3.6 failure: A failure is the termination of the ability of an item to perform a required function. NOTE After failure, the item has a fault. Analysis of successive anomalies or
48、defects affecting the same item can lead to the item being considered as “failed“. 3.7 full initialization: Any type of initialization procedure defined in respective Recommendations, except short initialization. 3.8 masked subcarrier: A subcarrier that is not transmitted during initialization and s
49、howtime. 3.9 MEDLEY set: A set of subcarriers used during the digital subscriber line (DSL) initialization. This set is defined in the respective Recommendations. 3.10 net data rate: Net data rate is defined in the ITU-T G.992.x-series Recommendations and in ITU-T G.993.2. Rec. ITU-T G.997.1 (2016)/Amd.1 (12/2017) 3 3.11 short initialization: Shortened type of initialization procedure, as specified in clause 7.2.1.3.3. Short initialization includes fast retrain, as spec
