1、INTERNATIONAL TELECOMMUNICATION UNIONITU-T Y.120TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITUCorrigendum 1(11/2000)SERIES Y: GLOBAL INFORMATION INFRASTRUCTUREAND INTERNET PROTOCOL ASPECTSGlobal information infrastructure GeneralGlobal Information Infrastructure scenariomethodologyCorrigendum 1ITU-T
2、Recommendation Y.120 Corrigendum 1(Formerly CCITT Recommendation)ITU-T Y-SERIES RECOMMENDATIONSGLOBAL INFORMATION INFRASTRUCTURE AND INTERNET PROTOCOL ASPECTSGLOBAL INFORMATION INFRASTRUCTUREGeneral Y.100Y.199Services, applications and middleware Y.200Y.299Network aspects Y.300Y.399Interfaces and pr
3、otocols Y.400Y.499Numbering, addressing and naming Y.500Y.599Operation, administration and maintenance Y.600Y.699Security Y.700Y.799Performances Y.800Y.899INTERNET PROTOCOL ASPECTSGeneral Y.1000Y.1099Services and applications Y.1100Y.1199Architecture, access, network capabilities and resource manage
4、ment Y.1200Y.1299Transport Y.1300Y.1399Interworking Y.1400Y.1499Quality of service and network performance Y.1500Y.1599Signalling Y.1600Y.1699Operation, administration and maintenance Y.1700Y.1799Charging Y.1800Y.1899For further details, please refer to the list of ITU-T Recommendations.ITU-T Y.120/
5、Cor.1 (11/2000) iITU-T Recommendation Y.120Global Information Infrastructure scenario methodologyCORRIGENDUM 1SourceCorrigendum 1 to ITU-T Recommendation Y.120 was prepared by ITU-T Study Group 13(2001-2004) and approved under the WTSA Resolution 1 procedure on 24 November 2000.ii ITU-T Y.120/Cor.1
6、(11/2000)FOREWORDThe International Telecommunication Union (ITU) is the United Nations specialized agency in the field oftelecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ ofITU. ITU-T is responsible for studying technical, operating and tariff question
7、s and issuing Recommendationson 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 turn, produce Recommendations on th
8、esetopics.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 areprepared on a collaborative basis with ISO and IEC.NOTEIn this Recommendation, the expressio
9、n “Administration“ is used for conciseness to indicate both atelecommunication administration and a recognized operating agency.INTELLECTUAL PROPERTY RIGHTSITU draws attention to the possibility that the practice or implementation of this Recommendation mayinvolve the use of a claimed Intellectual P
10、roperty Right. ITU takes no position concerning the evidence,validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or othersoutside of the Recommendation development process.As of the date of approval of this Recommendation, ITU had not received notice of
11、 intellectual property,protected by patents, which may be required to implement this Recommendation. However, implementors arecautioned that this may not represent the latest information and are therefore strongly urged to consult theTSB patent database. ITU 2001All rights reserved. No part of this
12、publication may be reproduced or utilized in any form or by any means,electronic or mechanical, including photocopying and microfilm, without permission in writing from ITU.ITU-T Y.120/Cor.1 (11/2000) 1ITU-T Recommendation Y.120Global Information Infrastructure scenario methodologyCORRIGENDUM 1Repla
13、ce existing Figure 5 with the following:T1317450-00AANNI-BNNI-A ANI DI PAI-A PAI-B OPINTAINNI-BNIUOPIOPICustomer premiseCore NetworkAccess NetworkBackboneswitchingLocaldistributionLocal NetworkFinal dropKey InterfaceLocalswitchingCPnetworkAdaptorFigure 5/Y.120 An example of a scenario using generic
14、elementsPrinted in SwitzerlandGeneva, 2001SERIES OF ITU-T RECOMMENDATIONSSeries A Organization of the work of ITU-TSeries B Means of expression: definitions, symbols, classificationSeries C General telecommunication statisticsSeries D General tariff principlesSeries E Overall network operation, tele
15、phone service, service operation and human factorsSeries F Non-telephone telecommunication servicesSeries G Transmission systems and media, digital systems and networksSeries H Audiovisual and multimedia systemsSeries I Integrated services digital networkSeries J Transmission of television, sound pr
16、ogramme and other multimedia signalsSeries K Protection against interferenceSeries L Construction, installation and protection of cables and other elements of outside plantSeries M TMN and network maintenance: international transmission systems, telephone circuits,telegraphy, facsimile and leased ci
17、rcuitsSeries N Maintenance: international sound programme and television transmission circuitsSeries O Specifications of measuring equipmentSeries P Telephone transmission quality, telephone installations, local line networksSeries Q Switching and signallingSeries R Telegraph transmissionSeries S Te
18、legraph services terminal equipmentSeries T Terminals for telematic servicesSeries U Telegraph switchingSeries V Data communication over the telephone networkSeries X Data networks and open system communicationsSeries Y Global information infrastructure and Internet protocol aspectsSeries Z Languages and general software aspects for telecommunication systems
