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    ITU-T I 610 AMD 1-2000 B-ISDN Operation and Maintenance Principles and Functions - Series I Integrated Services Digital Network Maintenance Principles (Amendment 1 Study Group 13)《.pdf

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    ITU-T I 610 AMD 1-2000 B-ISDN Operation and Maintenance Principles and Functions - Series I Integrated Services Digital Network Maintenance Principles (Amendment 1 Study Group 13)《.pdf

    1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU 1.61 O Amendment I (03/2000) SERIES I: INTEGRATED SERVICES DIGITAL NETWORK Maintenance principles B-ISDN operation and maintenance principles and functions Amendment I ITU-T Recommendation 1.610 - Amendment I

    2、 (Formerly CCITT Recommendation) For further details, please refer to the list of ITU-T Recommendations STD-ITU-T RECMN I-bLO AND b-ENGL ZOO0 m 4862593 0688829 LI.13 ITU-T Recommendation 1.61 O B-ISDN operation and maintenance principles and functions AMENDMENT 1 Summary This amendment contains only

    3、 editorial enhancements, but no technical changes, to the third revision (02/99) of ITU-T Recommendation 1.610. Source Amendment 1 to ITU-T Recommendation 1.610 was prepared by ITU-T Study Group 13 (1997-2000) and approved under the WTSC Resolution 1 procedure on 10 March 2000. FOREWORD The Internat

    4、ional Telecommunication Union (KU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendation

    5、s on them with a view to standardizing telecommunications on a worldwide 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 approva

    6、l of ITU-T Recommendations is covered by the procedure laid down in WTSC Resolution l. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administration

    7、“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. 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

    8、. 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 of intellect

    9、ual property, protected by patents, which may be required to implement this 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 publ

    10、ication 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. STD-ITU-T RECMN I-blO AMD L-ENGL 2000 4862573 0688833 subclause 8.3, which defines additional OAM functions between the transmiss

    11、ion path and ATM layer; subclause 9.2 and its subclauses, which define the segment OAM cells “segment AIS“ and “segment RDI“ and the associated processing (generation and termination), introduces new “end to end APS“ and “segment APS“ OAM cells for which lTU-T Recommendation 1.630 specifies the proc

    12、essing, has enhanced the specification for the use of the performance management OAM cells, introduces the ability to non-intrusively monitor OAM flows at intermediate points within the WC or WC segment, introduces an additional performance management mode in which forward performance monitoring is

    13、activated only; clause 10 and its subclauses, which introduce the OAM cell detection procedure (10. l), introduce a coding structure for location identifiers (1 O. l), extend the definition of the segment loopback OAM cell and associate the processing required in connection points and segment endpoi

    14、nts (including an incoming segment loopback cell extraction option), extend the number of PM block sizes, delete one deactivation response code point; Annex A, which is rewritten; hex C, which is rewritten; Appendices II, III, IV and V, which are new. Second revision First revision nitial version ST

    15、D-ITU-T RECNN I=bLO AND L-ENGL 2000 m 4862593 0688832 738 2.2 New clause 11 Add a new clause 1 1 to address the interworking of the new functionality that is introduced in the third revision (02/99) of ITU-T Recommendation 1.610 (i.e. segment VP-AIS, segment VC-AIS, segment VP-RDI, segment VC-RD1 OA

    16、M cells, new loopback type, larger PM block sizes) in networks that also include equipment designed according to previous versions of ITU-T Recommendation 1.61 O that do not support this new functionality. 11 Backward compatibility Equipment compliant with 1995 or earlier versions of ITU-T Recommend

    17、ation 1.610 will not generate segment VPNC-AIS OAM cells, will not detect the segment VPNC-AIS cells and associated defect conditions and will not declare the segment VPNC-AIS state. When there is a situation in which a 1999 version of an 1.610 compliant segment endpoint is interworking with equipme

    18、nt compliant with 1995 or earlier versions of 1.610 within the segment, it will be necessary to use segment CC OAM to be able to declare a segment VPNC AIS state. Equipment compliant with 1995 or earlier versions of ITU-T Recommendation 1.610 will not generate segment VPNC-RD1 OAM cells, will not de

    19、tect the segment VPNC-RD1 cells and associated defect conditions and will not declare the segment VPNC-RD1 state. Equipment compliant with 1995 or earlier versions of this ITU-T Recommendation will not recognize the all-Os LLID code in segment LB OAM cells as an MLT code. Equipment compliant with 19

    20、95 or earlier versions of this ITU-T Recommendation will not recognize the codes for PM block sizes above 1024. 2.3 Subclause 111.3.1.2 (Appendix III) Add a Note at the end of the second paragraph in subclause 111.3.1.2: NOTE - When an unintended branch exists between CPID (c) and a second VPI VCI within CPID (d), two seg-LB cells will be returned with LLID is CPID (d). An additional (8th) LB cell will be returned if the CP following CP with CPID (r) has the W1 VCr listed as an expected VPI VCI.


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