1、 International Telecommunication Union ITU-T G.8251TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Corrigendum 1(02/2012) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Packet over Transport aspects Quality and availability targets The control of jitter and wander within the
2、optical transport network (OTN) Corrigendum 1 Recommendation ITU-T G.8251 (2010) Corrigendum 1ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS G.100G.199 GENERAL CHARACTERISTICS COMMON TO ALL ANALOGUE CARRIER
3、-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.400G.449 COORDINATION OF
4、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 MULTIMEDIA QUALITY OF SERVICE AND PERFORMANCE GENERIC AND USER-RELATED
5、 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 Ethernet over Transport aspects G.8000G.8099 MPLS over Transport aspects G.8100G.8199 Quality and availability targets G.8200G.8299Service
6、 Management G.8600G.8699 ACCESS NETWORKS G.9000G.9999 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T G.8251 (2010)/Cor.1 (02/2012) i Recommendation ITU-T G.8251 The control of jitter and wander within the optical transport network (OTN) Corrigendum 1 Characteristi
7、cs of optical transport network hierarchy equipment functional blocks Summary Corrigendum 1 to Recommendation ITU-T G.8251 (2010) contains corrections to typographical errors in Appendix IV. History Edition Recommendation Approval Study Group 1.0 ITU-T G.8251 2001-11-29 15 1.1 ITU-T G.8251 (2001) Co
8、r. 1 2002-06-13 15 1.2 ITU-T G.8251 (2001) Amd. 1 2002-06-13 15 1.3 ITU-T G.8251 (2001) Cor. 2 2008-05-22 15 1.4 ITU-T G.8251 (2001) Amd.2 2010-01-13 15 2.0 ITU-T G.8251 2010-09-22 15 2.1 ITU-T G.8251 (2010) Amd. 1 2011-04-13 15 2.2 ITU-T G.8251 (2010) Cor. 1 2012-02-13 15 2.3 ITU-T G.8251 (2010) Am
9、d. 2 2012-02-13 15 ii Rec. ITU-T G.8251 (2010)/Cor.1 (02/2012) 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 (IT
10、U-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), which meets every four
11、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 within ITU-Ts purview, the n
12、ecessary 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 Recommendation is voluntary. How
13、ever, 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 as “must“ and the negativ
14、e 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 Recommendation may involve the use
15、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 of this Recommendation,
16、ITU had not 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 database at http:/www.
17、itu.int/ITU-T/ipr/. ITU 2012 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.8251 (2010)/Cor.1 (02/2012) 1 Recommendation ITU-T G.8251 The control of jitter and wander within the optical transport
18、network (OTN) Corrigendum 1 1 Scope This corrigendum contains corrections to typographical errors in an equation and clarifying text in Appendix IV of Recommendation ITU-T G.8251 (2010). 2 Corrections in Appendix IV Change Equation IV.2-31 from: 2411+=pH (IV.2-31) To: 2411+pH (IV.2-31) Modify the se
19、ntence following Equation IV.2-31 as follows: The approximate gain peaking, Hp, in Equation (IV.2-31), is a pure fraction (i.e., the gain peaking in dB is approximately equal to 20 times the log to base 10 of Hp 1 in Equation (IV.2-31). Printed in Switzerland Geneva, 2012 SERIES OF ITU-T RECOMMENDAT
20、IONS 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-telephone telecommunication services Series G Transmission systems and media, digital systems and networks Series
21、 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 Series K Protection against interference Series L Construction, installation and protection of cables and other elem
22、ents 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 and subjective and objective assessment method
23、s 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 and next-generation networks Series Z Languages and general software aspects for telecommunication systems
