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.994.1 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Corrigendum 1 (10/2016) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital sections and digital line system Metallic access networks Handsh
2、ake procedures for digital subscriber line transceivers Corrigendum 1 Recommendation ITU-T G.994.1 (2012) Corrigendum 1 ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS G.100G.199 GENERAL CHARACTERISTICS COMM
3、ON 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 fi
5、bre 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.9
6、59 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.994.1 (2012)/Cor
8、.1 (10/2016) i Recommendation ITU-T G.994.1 Handshake procedures for digital subscriber line transceivers Corrigendum 1 Summary Corrigendum 1 to Recommendation ITU-T G.994.1 (2012) includes: Correct the number of RFI bands for ITU-T G.9701. History Edition Recommendation Approval Study Group Unique
9、ID* 1.0 ITU-T G.994.1 1999-07-02 15 11.1002/1000/4720 1.1 ITU-T G.994.1 (1999) Cor. 1 2000-04-04 15 11.1002/1000/5139 2.0 ITU-T G.994.1 2001-02-09 15 11.1002/1000/5364 3.0 ITU-T G.994.1 2002-07-29 15 11.1002/1000/6119 4.0 ITU-T G.994.1 2003-05-22 15 11.1002/1000/6281 4.1 ITU-T G.994.1 (2003) Amd. 1
10、2004-02-22 15 11.1002/1000/7080 4.2 ITU-T G.994.1 (2003) Amd. 2 2004-06-13 15 11.1002/1000/7351 4.3 ITU-T G.994.1 (2003) Amd. 3 2005-01-13 15 11.1002/1000/7495 4.4 ITU-T G.994.1 (2003) Amd. 4 2006-01-13 15 11.1002/1000/8549 5.0 ITU-T G.994.1 2007-02-13 15 11.1002/1000/8993 5.1 ITU-T G.994.1 (2007) A
11、md. 1 2007-11-22 15 11.1002/1000/9167 5.2 ITU-T G.994.1 (2007) Amd. 2 2008-04-13 15 11.1002/1000/9388 5.3 ITU-T G.994.1 (2007) Amd. 3 2009-03-22 15 11.1002/1000/9675 5.4 ITU-T G.994.1 (2007) Amd. 4 2009-06-29 15 11.1002/1000/9891 5.5 ITU-T G.994.1 (2007) Amd. 5 2010-04-22 15 11.1002/1000/10415 5.6 I
12、TU-T G.994.1 (2007) Amd. 6 2010-11-29 15 11.1002/1000/11018 5.7 ITU-T G.994.1 (2007) Amd. 7 2011-04-13 15 11.1002/1000/11129 5.8 ITU-T G.994.1 (2007) Cor. 1 2011-10-29 15 11.1002/1000/11417 5.9 ITU-T G.994.1 (2007) Amd. 8 2011-12-16 15 11.1002/1000/11416 6.0 ITU-T G.994.1 2012-06-13 15 11.1002/1000/
13、11644 6.1 ITU-T G.994.1 (2012) Amd. 1 2012-10-29 15 11.1002/1000/11797 6.2 ITU-T G.994.1 (2012) Amd. 2 2013-08-29 15 11.1002/1000/11994 6.3 ITU-T G.994.1 (2012) Amd. 3 2014-01-13 15 11.1002/1000/12093 6.4 ITU-T G.994.1 (2012) Amd. 4 2014-12-05 15 11.1002/1000/12094 6.5 ITU-T G.994.1 (2012) Amd. 5 20
14、15-02-13 15 11.1002/1000/12373 6.6 ITU-T G.994.1 (2012) Amd. 6 2015-08-29 15 11.1002/1000/12564 6.7 ITU-T G.994.1 (2012) Amd. 7 2016-06-13 15 11.1002/1000/12797 6.8 ITU-T G.994.1 (2012) Cor. 1 2016-10-29 15 11.1002/1000/13063 * To access the Recommendation, type the URL http:/handle.itu.int/ in the
15、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.994.1 (2012)/Cor.1 (10/2016) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of teleco
16、mmunications, 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 Recommendations on them with a view to standardizing telecomm
17、unications 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 approval of ITU-T Recommendations is covered by the proc
18、edure 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“ is used for conciseness to indicate both a tele
19、communication 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 with the Recommendation is achieved when all of t
20、hese 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 required of any party. INTELLECTUAL PROPERTY RIGHTSIT
21、U 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 Intellectual Property Rights, whether asserted by ITU memb
22、ers 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, implementers are cautioned that this may not re
23、present 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 whatsoever, without the prior written permission of ITU. Rec. ITU-T G.994.1 (2
24、012)/Cor.1 (10/2016) 1 Recommendation ITU-T G.994.1 Handshake procedures for digital subscriber line transceivers Corrigendum 1 1) Correct the number of RFI bands for ITU-T G.9701 Modify Tables 11.70.4.4j-4, 11.70.4.4j-3, 11.70.4.4j-2, 11.70.4.4j-1 as follows: Table 11.70.4.4j-4 Standard information
25、 field ITU-T G.9701 RFI bands NPar(3) coding Octet 4j 3 (j = 1 to 1632) Bits ITU-T G.9701 RFI bands NPar(3)s Octet 4j 3 (j = 1 to 1632) 8 7 6 5 4 3 2 1 x x x x x x x x End sub-carrier index of band j (bits 12 to 7) Table 11.70.4.4j-3 Standard information field ITU-T G.9701 RFI bands NPar(3) coding O
26、ctet 4j 2 (j = 1 to 1632) Bits ITU-T G.9701 RFI bands NPar(3)s Octet 4j 2 (j = 1 to 1632) 8 7 6 5 4 3 2 1 x x x x x x x x End sub-carrier index of band j (bits 6 to 1) Table 11.70.4.4j-2 Standard information field ITU-T G.9701 RFI bands NPar(3) coding Octet 4j 1 (j = 1 to 1632) Bits ITU-T G.9701 RFI
27、 bands NPar(3)s Octet 4j 1 (j = 1 to 1632) 8 7 6 5 4 3 2 1 x x x x x x x x Start sub-carrier index of band j (bits 12 to 7) Table 11.70.4.4j-1 Standard information field ITU-T G.9701 RFI bands NPar(3) coding Octet 4j (j = 1 to 1632) Bits ITU-T G.9701 RFI bands NPar(3)s Octet 4j (j = 1 to 1632) 8 7 6
28、 5 4 3 2 1 x x x x x x x x Start sub-carrier index of band j (bits 6 to 1) Printed in Switzerland Geneva, 2017 SERIES OF ITU-T RECOMMENDATIONS Series A Organization of the work of ITU-T Series D General tariff principles Series E Overall network operation, telephone service, service operation and hu
29、man factors Series F Non-telephone telecommunication services Series G Transmission systems and media, digital systems and networks Series H Audiovisual and multimedia systems Series I Integrated services digital network Series J Cable networks and transmission of television, sound programme and oth
30、er multimedia signals Series K Protection against interference Series L Environment and ICTs, climate change, e-waste, energy efficiency; construction, installation and protection of cables and other elements of outside plant Series M Telecommunication management, including TMN and network maintenan
31、ce Series N Maintenance: international sound programme and television transmission circuits Series O Specifications of measuring equipment Series P Terminals and subjective and objective assessment methods Series Q Switching and signalling Series R Telegraph transmission Series S Telegraph services
32、terminal equipment Series T Terminals for telematic services Series U Telegraph switching Series V Data communication over the telephone network Series X Data networks, open system communications and security Series Y Global information infrastructure, Internet protocol aspects and next-generation networks, Internet of Things and smart cities Series Z Languages and general software aspects for telecommunication systems
