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.8201 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Corrigendum 1 (01/2015) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Packet over Transport aspects Synchronization, quality and availability t
2、argets Error performance parameters and objectives for multi-operator international paths within optical transport networks Corrigendum 1 Recommendation ITU-T G.8201 (2011) Corrigendum 1 ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHO
3、NE CONNECTIONS AND CIRCUITS G.100G.199 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
4、-RELAY OR SATELLITE LINKS AND INTERCONNECTION 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
5、LINE SYSTEM G.900G.999 MULTIMEDIA QUALITY OF SERVICE AND 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 Ethernet over Transport aspects G.8000G.8099
6、MPLS over Transport aspects G.8100G.8199 Synchronization, quality and availability targets G.8200G.8299 Service 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.8201 (2011)/Cor.1 (01/2015) i Recommendation ITU-T
7、 G.8201 Error performance parameters and objectives for multi-operator international paths within optical transport networks Corrigendum 1 Summary Corrigendum 1 to Recommendation ITU-T G.8201 (2011) removes the contribution of the IAE and PLM defects to ODUk tandem connection and ODUkP path terminat
8、ion near-end severely errored second in alignment with the specification of the near-end defect second performance variable in Recommendation ITU-T G.798. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T G.8201 2003-09-13 13 11.1002/1000/6979 2.0 ITU-T G.8201 2011-04-13 15 11
9、.1002/1000/11141 2.1 ITU-T G.8201 (2011) Cor. 1 2015-01-13 15 11.1002/1000/12387 _ * 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.
10、ITU-T G.8201 (2011)/Cor.1 (01/2015) 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 o
11、f 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 topi
12、cs 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 prep
13、ared 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 ma
14、y 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 e
15、xpress 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 Pr
16、operty 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
17、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.itu.int/ITU-T/ipr/. ITU 2015
18、 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.8201 (2011)/Cor.1 (01/2015) 1 Recommendation ITU-T G.8201 Error performance parameters and objectives for multi-operator international paths within
19、optical transport networks 1) Clause 7.1.2: Defects Modify Table 7-1 as follows: Table 7-1 Defects resulting in a near-end severely errored second Near-end defects (Notes 2, 3, 4) Path termination Non-intrusive monitor Tandem connection OCI (Note 1) OCI (Note 1) AIS AIS IAE LCK LCK LTC PLM TIM TIM N
20、OTE 1 Paths not actually completed, e.g., during path set-up, will contain the ODUk-OCI (open connection indication) signal. NOTE 2 The above defects are path defects only. Section defects such as OCh LOS, OTUk LOF, OTUk AIS, OTUk TIM, and OTM LOS give rise to an AIS defect in the path layers. NOTE
21、3 When a near-end SES is caused by a near-end defect as defined above, the far-end performance event counters are not incremented, i.e., an error-free period is assumed. When a near-end SES results from 15% errored blocks, the far-end performance evaluation continues during the near-end SES. This ap
22、proach does not allow reliable evaluation of far-end data if the near-end SES is caused by a defect. It should be noted in particular that the evaluation of far-end events (such as SES or unavailability) can be inaccurate in the case where far-end SESs occur in coincidence with near-end SESs caused
23、by a defect. Such inaccuracies cannot be avoided, but are negligible in practice because of the low probability of the occurrence of such phenomena. NOTE 4 Refer to ITU-T G.798 for defects contributing to performance monitoring in each trail termination sink function. Printed in Switzerland Geneva,
24、2015 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-telephone telecommunication services Series G Transmission systems and media, dig
25、ital 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 Series K Protection against interference Series L Construction, installation and pro
26、tection 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 and subjective
27、 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 and next-generation networks Series Z Languages and general software aspects for telecommunication systems
