1、 International Telecommunication Union ITU-T G.806TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Corrigendum 1(10/2012) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital networks General aspects Characteristics of transport equipment Description methodology and generic
2、functionality Corrigendum 1 Recommendation ITU-T G.806 (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 COMMON TO ALL ANALOGUE CARRIER-TRANSMISSION SYST
3、EMS 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 RADIOTELEPHONY AND
4、 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 General aspects G.800G.809Design objectives for digital networks G.810G.819 Quality and availability targets G.820G.829 Network capabilities
5、 and functions G.830G.839 SDH network characteristics G.840G.849 Management of transport network G.850G.859 SDH radio and satellite systems integration G.860G.869 Optical transport networks G.870G.879 DIGITAL SECTIONS AND DIGITAL LINE SYSTEM G.900G.999 MULTIMEDIA QUALITY OF SERVICE AND PERFORMANCE G
6、ENERIC 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. Rec. ITU-T G.8
7、06 (2012)/Cor.1 (10/2012) i Recommendation ITU-T G.806 Characteristics of transport equipment Description methodology and generic functionality Corrigendum 1 Summary Corrigendum 1 to Recommendation ITU-T G.806 (2012) clarifies: Degraded threshold (DEGTHR) for higher rate interfaces than STM-16. Wait
8、 To Restore (WTR) timer value. History Edition Recommendation Approval Study Group 1.0 ITU-T G.806 2000-10-06 15 1.1 ITU-T G.806 (2000) Amd. 1 2003-03-16 15 2.0 ITU-T G.806 2004-02-06 15 2.1 ITU-T G.806 (2004) Amd. 1 2004-06-13 15 2.2 ITU-T G.806 (2004) Cor. 1 2004-08-22 15 2.3 ITU-T G.806 (2004) Co
9、r. 2 2005-01-13 15 3.0 ITU-T G.806 2006-03-29 15 3.1 ITU-T G.806 (2006) Amd. 1 2008-11-22 15 4.0 ITU-T G.806 2009-01-13 15 4.1 ITU-T G.806 (2009) Amd. 1 2011-06-22 15 5.0 ITU-T G.806 2012-02-13 15 5.1 ITU-T G.806 (2012) Cor. 1 2012-10-29 15 ii Rec. ITU-T G.806 (2012)/Cor.1 (10/2012) FOREWORD The Int
10、ernational 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 ITU. ITU-T is responsible for studying technical,
11、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 for study by the ITU-T study groups which, in tur
12、n, 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 prepared on a collaborative basis with ISO and IEC. NOTE
13、 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 contain certain mandatory provisions (to ensure, e
14、.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 express requirements. The use of such words does not
15、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 of a claimed Intellectual Property Right. ITU takes no position concerning the
16、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 intellectual property, protected by patents, whi
17、ch 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 2013 All rights reserved. No part of this publication m
18、ay be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T G.806 (2012)/Cor.1 (10/2012) 1 Recommendation ITU-T G.806 Characteristics of transport equipment Description methodology and generic functionality Corrigendum 1 The following corrections should be made
19、 to Recommendation ITU-T G.806 (2012). 1) Clause 6.2.3.1.2, Excessive error (dEXC) and degraded signal defects (dDEG) assuming bursty distribution of errors Update Note 2 as indicated below: NOTE 2 When using percentage, for higher rate interfaces, 1% is equal to a large number of blocks. For exampl
20、e, in an STM-16 interface, 1% is equal to a step of 30720 blocks in the interval for the multiplex section. For higher rate interfaces, provisioning values less than 1% need to be supported. 2) Clause 7, Information flow (XXX_MI) across the XXX_MP reference points Update Table 7-1 as indicated below
21、: Table 7-1 Generic command, configuration, provisioning and reporting information flow over the XXX_MP reference points Management point Process within atomic function Input (“Set“) Output (“Get“) TT_So_MP Trace identifier Transmitted trail trace identifier (MI_TxTI) value TT_Sk_MP Termination poin
22、t/port mode Termination point mode control (MI_TPmode: MON, NMON) Port mode control (MI_Portmode: MON, (AUTO), NMON) Continuity supervision Signal loss fault cause (MI_cLOS, MI_cUNEQ, MI_cLTC) Connectivity supervision Expected trail trace identifier (MI_ExTI) value Misconnected traffic defect detect
23、ion control (MI_TIMdis: true, false) Enable/disable AIS insertion on dTIM detection (MI_TIMAISdis: true, false) Accepted (received) trail trace identifier value (MI_AcTI) Misconnected traffic fault cause (MI_cTIM) 2 Rec. ITU-T G.806 (2012)/Cor.1 (10/2012) Table 7-1 Generic command, configuration, pr
24、ovisioning and reporting information flow over the XXX_MP reference points Management point Process within atomic function Input (“Set“) Output (“Get“) Signal quality supervision Poisson-based excessive defect threshold selection (MI_EXC_X: 103,104, 105) Poisson-based degraded defect threshold selec
25、tion (MI_DEG_X: 105, 106, 107, 108, 109) Poisson-based excessive errors fault cause (MI_cEXC) Poisson-based degraded errors fault cause (MI_cDEG) Burst-based degraded defect interval threshold selection (MI_DEGTHR: 0(30)100% or 0.N) (Note 2) Burst-based degraded defect monitor period selection (MI_D
26、EGM: 210) Burst-based degraded errors fault cause (MI_cDEG) C_MP Connection management Matrix connection selection Protection Protection group selection (set of connection points, protection architecture: 1+1/1:n/m:n, switching type: uni-/bidirectional, operation type: revertive/non-revertive, APS u
27、sage: true/false, extra traffic: true/false) External switch commands (MI_ExtCmd: LO, FS, MS, EXER, CLR) External control command (LOW) Hold off time value (MI_HOtime) WaitToRestore value (MI_WTRtime: 0(5)12 minutes) (Note 3) Protocol fault cause (MI_cFOP) Protection status (for further study) NOTE
28、1 Underlined values are suggested defaults. NOTE 2 For higher rate interfaces, this default is undefined. Values less than 1% will need to be supported. NOTE 3 The value of 0 for WTR is intended to be used for testing purposes only. It is not recommended for use in operational networks. Printed in S
29、witzerland Geneva, 2013 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 sys
30、tems 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 Series K Protection against interference Series L Construction, i
31、nstallation 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 Termi
32、nals 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 and next-generation networks Series Z Languages and general software aspects for telecommunication systems
