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 A.12 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Corrigendum 2 (02/2016) SERIES A: ORGANIZATION OF THE WORK OF ITU-T Identification and layout of ITU-T Recommendations Corrigendum 2: Update to the title of the Y-series
2、Recommendation ITU-T A.12 (2008) Corrigendum 2 Rec. ITU-T A.12 (2008)/Cor.2 (02/2016) i Recommendation ITU-T A.12 Identification and layout of ITU-T Recommendations Corrigendum 2 Update to the title of the Y-series Summary Recommendation ITU-T A.12 provides information on the designation of letter s
3、eries for ITU-T Recommendations. Corrigendum 2 corrects the title of the Y-series of Recommendations to reflect the new area of responsibility for ITU-T Study Group 20. This corrigendum also reflects the TSAG (02/2016) decision to make mandatory the identification of keywords. History Edition Recomm
4、endation Approval Study Group Unique ID* 1.0 ITU-T A.12 2000-10-06 TSAG 11.1002/1000/5279 2.0 ITU-T A.12 2004-10-14 TSAG 11.1002/1000/7422 3.0 ITU-T A.12 2008-10-30 TSAG 11.1002/1000/9643 3.1 ITU-T A.12 (2008) Cor.1 2015-06-05 TSAG 11.1002/1000/12526 3.2 ITU-T A.12 (2008) Cor.2 2016-02-05 TSAG 11.10
5、02/1000/12786 Keywords ITU-T Recommendations layout, letter series designations. _ * 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.
6、ITU-T A.12 (2008)/Cor.2 (02/2016) 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 Standardization Sector (ITU-T) is a permanent organ of
7、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), which meets every four years, establishes the topics
8、 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 within ITU-Ts purview, the necessary standards are prepar
9、ed 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 Recommendation is voluntary. However, the Recommendation may
10、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 as “must“ and the negative equivalents are used to exp
11、ress 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 this Recommendation may involve the use of a claimed Intellectual Prop
12、erty 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 of this Recommendation, ITU had not received notice of
13、 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 database at http:/www.itu.int/ITU-T/ipr/. ITU 2016 A
14、ll rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T A.12 (2008)/Cor.2 (02/2016) 1 Recommendation ITU-T A.12 Identification and layout of ITU-T Recommendations Corrigendum 2 Update to the title of the Y-se
15、ries Editorial note: This is a complete-text publication. Modifications introduced by this corrigendum are shown in revision marks relative to Recommendation ITU-T A.12 (2008) plus its Corrigendum 1. 1 Scope The Telecommunication Standardization Advisory Group (TSAG) periodically reviews the methods
16、 of identifying and laying out Recommendations as well as the Authors Guide for drafting ITU-T Recommendations, prepared and updated by the Telecommunication Standardization Bureau (TSB), providing thus detailed guidelines on format and style. This Recommendation provides principles that are applied
17、 in identifying and laying out Recommendations. 2 Identification and layout of Recommendations 2.1 All Recommendations of the ITU Telecommunication Standardization Sector (ITU-T) shall be numbered. The number of each Recommendation shall have a letter prefix referring to the series as well as a numb
18、er identifying the particular subject in that series. The numbering shall be done in a manner that permits clear, unequivocal identification and facilitates electronic storage of information concerning the Recommendation. The Recommendation number shall be associated on the cover with the date of ap
19、proval in the format YYYY. The month may be added if required for uniqueness. 2.2 The scope of the series identified by the letter shall be as follows: A Organization of the work of ITU-T B Not allocated C Not allocated D General tariff principles E Overall network operation, telephone service, serv
20、ice operation and human factors F Non-telephone telecommunication services G Transmission systems and media, digital systems and networks H Audiovisual and multimedia systems I Integrated services digital network J Cable networks and transmission of television, sound programme and other multimedia s
21、ignals K Protection against interference L Environment and ICTs, climate change, e-waste, energy efficiency; construction, installation and protection of cables and other elements of outside plant M Telecommunication management, including TMN and network maintenance N Maintenance: international soun
22、d-programme and television-transmission circuits O Specifications of measuring equipment P Telephone transmission quality, telephone installations, local line networks Q Switching and signalling 2 Rec. ITU-T A.12 (2008)/Cor.2 (02/2016) R Telegraph transmission S Telegraph services terminal equipment
23、 T Terminals for telematic services U Telegraph switching V Data communication over the telephone network W Not allocated X Data networks, open system communications and security Y Global information infrastructure, Internet protocol aspects, and next-generation networks, Internet of Things and smar
24、t cities Z Languages and general software aspects for telecommunication systems 2.3 Recommendations in each series shall be classified in sections, according to subject. 2.4 The title of each Recommendation should be concise (preferably no more than one line) but unique, meaningful and unambiguous.
25、The details identifying the precise intent and coverage should be contained in the text where possible (e.g., under “Scope“ clause). 2.5 The date of formal approval of the Recommendation, the study group(s) responsible for its approval and a record of revisions shall be clearly indicated. 2.6 The au
26、thor of a new or revised Recommendation shall provide, in front of the main body of the Recommendation, a summary and a set of keywords as outlined in the “Authors Guide for drafting ITU-T Recommendations“. The author may also provide other up-front elements, such as background information and keywo
27、rds, as provided for in the Authors Guide. 2.7 The “Authors Guide for drafting ITU-T Recommendations“ should be applied in drafting new Recommendations and, wherever practicable, in revising existing Recommendations. Printed in Switzerland Geneva, 2016 SERIES OF ITU-T RECOMMENDATIONS Series A Organi
28、zation 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-telephone telecommunication services Series G Transmission systems and media, digital systems and networks Series H Audiovisual and m
29、ultimedia systems Series I Integrated services digital network Series J Cable networks and transmission of television, sound programme and other multimedia signals Series K Protection against interference Series L Environment and ICTs, climate change, e-waste, energy efficiency; construction, instal
30、lation 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 Series O Specifications of measuring equipment Series P Terminals
31、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 security Series Y Global information infrastructure, Internet protocol aspects, next-generation networks, Internet of Things and smart cities Series Z Languages and general software aspects for telecommunication systems
