1、 International Telecommunication Union ITU-T G.994.1TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 3(01/2014) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital sections and digital line system Metallic access networks Handshake procedures for digital subscribe
2、r line transceivers Amendment 3: Codepoints for ITU-T G.998.4 extensions and exchange of transfer ID Recommendation ITU-T G.994.1 (2012) Amendment 3 ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS G.100G.199
3、 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 CARRIER TELEPHONE SYSTEMS ON RADIO-RELAY OR SATELLITE LINKS AND INTERCON
4、NECTION 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.899 DIGITAL SECTIONS AND DIGITAL LINE SYSTEM G.900G.999 General G.900G.
5、909 Parameters for optical fibre 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
6、Digital line systems G.950G.959 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.999MULTIMEDIA QUALITY OF SERVICE AND
7、PERFORMANCE GENERIC AND USER-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. R
8、ec. ITU-T G.994.1 (2012)/Amd.3 (01/2014) i Recommendation ITU-T G.994.1 Handshake procedures for digital subscriber line transceivers Amendment 3 Codepoints for ITU-T G.998.4 extensions and exchange of transfer ID Summary Amendment 3 to Recommendation ITU-T G.994.1 (2012) covers the following functi
9、onalities: 1. Additional codepoints for the support of ITU-T G.998.4 Annex D in conjunction with ITU-T G.993.2. 2. Additional codepoints for the exchange of transceiver ID. History Edition Recommendation Approval Study Group Unique ID*1.0 ITU-T G.994.1 1999-07-02 15 11.1002/1000/4720 1.1 ITU-T G.994
10、.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 2004-02-22 15 11.1002/1000/7080 4.2 ITU-T G.994.1 (2003) Amd. 2 2004-
11、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) Amd. 1 2007-11-22 15 11.1002/1000/9167 5.2 ITU-T G.994.1 (2007) Amd. 2
12、 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 ITU-T G.994.1 (2007) Amd. 6 2010-11-29 15 11.1002/1000/11018 5.7 ITU-T
13、 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 11.1002/1000/11644 6.1 ITU-T G.994.1 (2012) Amd. 1 2012-10-29 15 11.1002/1000/1179
14、7 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 _ *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, ht
15、tp:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T G.994.1 (2012)/Amd.3 (01/2014) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication St
16、andardization 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 Assembly (WTSA),
17、 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 which fall with
18、in 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 with this Recommen
19、dation 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 language such a
20、s “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 RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendat
21、ion 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 date of approval
22、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 represent the latest information and are therefore strongly urged to consult the TSB patent da
23、tabase at http:/www.itu.int/ITU-T/ipr/. ITU 2014 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 (2012)/Amd.3 (01/2014) 1 Recommendation ITU-T G.994.1 Handshake procedures for digital subscri
24、ber line transceivers Amendment 3 Codepoints for ITU-T G.998.4 extensions and exchange of transfer ID 1) Codepoints for the support of ITU-T G.998.4 Annex D in conjunction with ITU-T G.993.2 Modify Table 11.68.0.1 as follows: Table 11.68.0.1 Standard information field ITU-T G.993.2 SPar(2) coding Oc
25、tet 2 Bits ITU-T G.993.2 SPar(2)s Octet 2 8 7 6 5 4 3 2 1 x x x x x x x 1 Annex A US0 x x x x x x 1 x Annex B US0 x x x x x 1 x x Annex C US0 x x x x 1 x x x ITU-T G.993.5 x x x 1 x x x x ITU-T G.998.4 extensionsReserved for allocation by ITU-T x x 1 x x x x x Reserved for allocation by ITU-T x x 0
26、0 0 0 0 0 No parameters in this octet Add new Table 11.68.11 after Table 11.68.10: Table 11.68.11 Standard information field ITU-T G.993.2 ITU-T G.998.4 extensions NPar(3) coding Octet 1 Bits ITU-T G.993.2 ITU-T G.998.4 extensions NPar(3)s Octet 1 8 7 6 5 4 3 2 1 x x x x x x x 1 ITU-T G.998.4 Annex
27、D support x x x x x x 1 x Reserved for allocation by ITU-T x x x x x 1 x x Reserved for allocation by ITU-T x x x x 1 x x x Reserved for allocation by ITU-T x x x 1 x x x x Reserved for allocation by ITU-T x x 1 x x x x x Reserved for allocation by ITU-T x x 0 0 0 0 0 0 No parameters in this octet 2
28、 Rec. ITU-T G.994.1 (2012)/Amd.3 (01/2014) 2) Codepoints for the exchange of transceiver ID Modify Table 9 as follows: Table 9 Identification field SPar(1) coding Octet 1 Bits SPar(1)s Octet 1 8 7 6 5 4 3 2 1 x x x x x x x 1 Net data rate upstream (Note 1) x x x x x x 1 x Net data rate downstream (N
29、ote 1) x x x x x 1 x x Data flow characteristics upstream (Note 2) x x x x 1 x x x Data flow characteristics downstream (Note 2) x x x 1 x x x x xTU-R splitter information (Note 3) x x 1 x x x x x xTU-C splitter information (Note 3) x 1 x x x x x x Transceiver IDReserved for allocation by ITU-T x 0
30、0 0 0 0 0 0 No parameters set in this octet NOTE 1 In a CLR, CL or MP message, the data rates indicated in this Recommendation are of informative nature and do not imply any requirements on the net data rate during data mode. The data rate values are set and used by layers higher than the xTU-x alth
31、ough an xTU-x may monitor the information. The data rate values are useful to help the higher layers to select between the various ITU-T G.99x.x transceivers based upon information indicated by an application layer. In an MS message: If the xTU-x is capable of supporting the information, it shall re
32、spond with an ACK. If the xTU-x is either not capable of supporting the information or the negotiation of this information, it shall respond with a NAK-NS. NOTE 2 In a CLR, CL or MP message, the latencies indicated in this Recommendation are of informative nature and do not imply any requirements on
33、 the latency during data mode. The latency values are set and used by layers higher than the xTU-x although an xTU-x may monitor the information. The latency values are useful to help the higher layers to select between the various ITU-T G.99x.x transceivers and coding parameters based upon informat
34、ion indicated by an application layer. In an MS message: If the xTU-x is capable of supporting the information, it shall respond with an ACK. If the xTU-x is either not capable of supporting the information or the negotiation of this information, it shall respond with a NAK-NS. NOTE 3 Splitter infor
35、mation is only conveyed by an xTU-x if it has the capability of determining the local splitter information. Splitter information is only a capabilities indication and shall not be included in an MP or MS message. Rec. ITU-T G.994.1 (2012)/Amd.3 (01/2014) 3 Add the following new tables after Table 9.
36、11: Table 9.13 Identification field Transceiver ID NPar(2) Octet 1 Bits Transceiver ID NPar(2)s Octet 1 8 7 6 5 4 3 2 1 x x x x x x x 1 Reserved for allocation by ITU-T x x x x x x 1 x Reserved for allocation by ITU-T x x x x x 1 x x Reserved for allocation by ITU-T x x x x 1 x x x Reserved for allo
37、cation by ITU-T x x x 1 x x x x Reserved for allocation by ITU-T x x 1 x x x x x Reserved for allocation by ITU-T x x 0 0 0 0 0 0 No parameters in this octet Table 9.14 Identification field Transceiver ID SPar(2) Octet 1 Bits Transceiver ID SPar(2)s Octet 1 8 7 6 5 4 3 2 1 x x x x x x x 1 Network si
38、de transceiver ID x x x x x x 1 x Remote side transceiver ID x x x x x 1 x x Reserved for allocation by ITU-T x x x x 1 x x x Reserved for allocation by ITU-T x x x 1 x x x x Reserved for allocation by ITU-T x x 1 x x x x x Reserved for allocation by ITU-T x x 0 0 0 0 0 0 No parameters in this octet
39、 Table 9.14.1 Identification field Network side transceiver ID NPar(3) coding Octet 1 Bits Network side transceiver ID NPar(3)s Octet 1 8 7 6 5 4 3 2 1 x x x x x x x x Network side transceiver ID (bits 30 to 25) Table 9.14.1.1 Identification field Network side transceiver ID NPar(3) coding Octet 2 B
40、its Network side transceiver ID NPar(3)s Octet 2 8 7 6 5 4 3 2 1 x x x x x x x x Network side transceiver ID (bits 24 to 19) Table 9.14.1.2 Identification field Network side transceiver ID NPar(3) coding Octet 3 Bits Network side transceiver ID NPar(3)s Octet 3 8 7 6 5 4 3 2 1 x x x x x x x x Networ
41、k side transceiver ID (bits 18 to 13) 4 Rec. ITU-T G.994.1 (2012)/Amd.3 (01/2014) Table 9.14.1.3 Identification field Network side transceiver ID NPar(3) coding Octet 4 Bits Network side transceiver ID NPar(3)s Octet 4 8 7 6 5 4 3 2 1 x x x x x x x x Network side transceiver ID (bits 12 to 7) Table
42、9.14.1.4 Identification field Network side transceiver ID NPar(3) coding Octet 5 Bits Network side transceiver ID NPar(3)s Octet 5 8 7 6 5 4 3 2 1 x x x x x x x x Network side transceiver ID (bits 6 to 1) Table 9.14.2 Identification field Remote side transceiver ID NPar(3) coding Octet 1 Bits Remote
43、 side transceiver ID NPar(3)s Octet 1 8 7 6 5 4 3 2 1 x x x x x x x x Remote side transceiver ID (bits 30 to 25) Table 9.14.2.1 Identification field Remote side transceiver ID NPar(3) coding Octet 2 Bits Remote side transceiver ID NPar(3)s Octet 2 8 7 6 5 4 3 2 1 x x x x x x x x Remote side transcei
44、ver ID (bits 24 to 19) Table 9.14.2.2 Identification field Remote side transceiver ID NPar(3) coding Octet 3 Bits Remote side transceiver ID NPar(3)s Octet 3 8 7 6 5 4 3 2 1 x x x x x x x x Remote side transceiver ID (bits 18 to 13) Table 9.14.2.3 Identification field Remote side transceiver ID NPar
45、(3) coding Octet 4 Bits Remote side transceiver ID NPar(3)s Octet 4 8 7 6 5 4 3 2 1 x x x x x x x x Remote side transceiver ID (bits 12 to 7) Table 9.14.2.4 Identification field Remote side transceiver ID NPar(3) coding Octet 5 Bits Remote side transceiver ID NPar(3)s Octet 5 8 7 6 5 4 3 2 1 x x x x
46、 x x x x Remote side transceiver ID (bits 6 to 1) Printed in Switzerland Geneva, 2014 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 human factors Series F Non-
47、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 other multimedia signals Ser
48、ies K Protection against interference Series L Construction, installation and protection of cables and other elements of outside plant Series M Telecommunication management, including TMN and network maintenance Series N Maintenance: international sound programme and television transmission circuits
49、 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 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 s
