1、INTERNATIONAL TELECOMMUNICATION UNION ITU=T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU 1.630 Corrigendum I (03/2 000) SERIES I: INTEGRATED SERVICES DIGITAL NETWORK Maintenance principles ATM protection switching Corrigendum I ITU-T Recommendation 1.630 - Corrigendum I (Formerly CCITT Recommenda
2、tion) STD-ITU-T RECMN 1.630 C0RR.L-ENGL 2000 I 48b259L Ob8Bfl4O 804 ITU-T I-SERIES RECOMMENDATIONS INTEGRATED SERVICES DIGITAL NETWORK GENERAL STRUCTURE Terminology 1.110-1.119 Description of ISDNs I. 120-1. 129 General modelling methods 1.130-1.139 Telecommunication network and service attributes 1
3、.140-1.149 General description of asynchronous transfer mode 1.150-1.199 Scope 1.200-1.209 General aspects of services in ISDN 1.210-1.219 Common aspects of services in the ISDN 1.220-1.229 Bearer services supported by an ISDN 1.230-1.239 Teleservices supported by an ISDN 1.240-1.249 Supplementary s
4、ervices in ISDN 1.250-1.299 Network functional principles 1.3 161.3 19 Reference models 1.320-1.329 Numbering, addressing and routing 1.330-1.339 Connection types 1.340-1.349 Performance objectives 1.350-1.359 Protocol layer requirements 1.360-1.369 General network requirements and functions 1.37GI.
5、399 Application of I-series Recommendations to ISDN user-network interfaces 1.420-1.429 Layer 1 Recommendations 1.430-1.439 Layer 2 Recommendations 1.440-1.449 Layer 3 Recommendations 1.4561.459 Multiplexing, rate adaption and support of existing interfaces 1.460-1.469 Aspects of ISDN affecting term
6、inal requirements 1.470-1.499 SERVICE CAPABILITIES OVERALL NETWORK ASPECTS AND FUNCTIONS ISDN USER-NETWORK INTERFACES B-ISDN EQUIPMENT ASPECTS ATM equipment Transport functions Management of ATM equipment Multiplexing aspects 1.730-1.739 1.740-1.749 1.7561.759 1.760-1.769 For further details, please
7、 refer to the list of ITU-T Recommendations. - STDaITU-T RECMN 1.630 CORR-3-ENGL 2000 = 4862593 0688843 740 ITU-T Recommendation 1.630 ATM protection switching CORRIGENDUM 1 Summary This corrigendum contains only editorial enhancements and corrections, but no technical changes, to the first version
8、(02/99) of ITU-T Recommendation 1.630. Source Corrigendum 1 to ITU-T Recommendation 1.630 was prepared by ITU-T Study Group 13 (1997-2000) and approved under the WTSC Resolution 1 procedure on 10 March 2000. FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized a
9、gency in the field of telecommunications. The EU Telecommunication Standardization 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 worldwid
10、e basis. The World Telecommunication Standardization Conference (WTSC), 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 WTS
11、C Resolution 1. In some areas of information technology which fall within IT-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and LEC. NOTE In this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunication administr
12、ation and a recognized operating agency. INTELLECTUAL PROPERTY FUGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. IT takes no position concerning the evidence, validity or applicabilit
13、y of claimed Intellectual Property Rights, whether asserted by U members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, IT had not received notice of intellectual property, protected by patents, which may be required to implement this
14、Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. O ITU 2001 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electroni
15、c or mechanical, including photocopying and microfilm, without permission in writing from ITU. STD-ITU-T RECMN 1.630 CORR-1-ENGL 2000 Y862571 Ob88843 513 ITU-T Recommendation 1.630 ATM protection switching CORRIGENDUM 1 1 Introduction This corrigendum contains only editorial enhancements and correct
16、ions, but no technical changes, to the first version (02/99) of ITU-T Recommendation 1.630. 2 Clause 3 Delete the last sentence “Switch action is conducted except when signal fail condition exists for the protection entity to switch over.“Ji-om item 3.10 forced switch for working entity #n. Replace
17、the definitions of VCG - P, VCG - Ii: VPG - P and VPG - W with the following ones: 3.32 3.33 3.36 3.37 Add the following definition: 3.39 and protection entities. VCG-P: The protection entity in a VC Group protected domain. VCG-W: The working entity in a VC Group protected domain. VPG-P: The protect
18、ion entity in a VP Group protected domain. VPG-W: The working entity in a VP Group protected domain. normal traffic: Traffic that is protected by two alternative transport entities, called working - STD-ITU-T RECMN Iob30 C0RR.L-ENGL 2000 W 48b259L Ob88844 45T 9 3 Subclause 5.3.1 Replace Figure 4l.K.
19、630 with the following. 6 7 8 test trail for working 4 T1313970-98 Protection domain OAM Type (0101) Function Type K11 K12 K13 K14 K15 I K16 I K17 I K18 K21 K22 K23 K24 Unused (0000) 0 Connection point 0 Source/sink of e-t-e OAM flow 1 Protection switching function N VPGNCG consisting of N VPIVC net
20、work connections or subnetwork connections 9 52 53 Figure 4D.630 - 1+1 or 1:l traiYT group protection Unused (6AH) Reserved for future use I CRC- 1 O CRC- 1 O 4 Subclause 5.8 Replace Figure 9d.630 with the following figure illustrating the relation of the cells octet bit numbering and the bit numbering in the KI and K2 octets: 8 7 6 5 4 3 2 1 Header
