CAN CSA-ISO IEC 15049-2001 Information Technology - Telecommunications and Information Exchange between Systems - Private Integrated Services Network - Specification Functional Modl.pdf
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1、National Standard of CanadaCAN/CSA-ISO/IEC 15049-01(ISO/IEC 15049:1997)International Standard ISO/IEC 15049:1997 (first edition, 1997-05-15), has been adopted withoutmodification as CSA Standard CAN/CSA-ISO/IEC 15049-01, which has been approved as a National Standardof Canada by the Standards Counci
2、l of Canada.ISBN 1-55324-333-1 March 2001G35G48G49G48G55G48G51G46G48 G51G58G50G45G48G55G2cG36G32G12G2cG28G26 G14G18G13G17G1cG1d G14G1cG1cG1aGbG28GcThe Canadian Standards Association, which The Standards Council of Canada is theoperates under the name CSA International coordinating body of the Nation
3、al Standards system, (CSA), under whose auspices this National Standard a federation of independent, autonomoushas been produced, was chartered in 1919 and organizations working towards the furtheraccredited by the Standards Council of Canada to the development and improvement of voluntaryNational S
4、tandards system in 1973. It is a not-for-profit, standardization in the national interest.nonstatutory, voluntary membership association The principal objects of the Council are to foster engaged in standards development and certification and promote voluntary standardization as a means activities.
5、of advancing the national economy, benefiting theCSA standards reflect a national consensus of health, safety, and welfare of the public, assisting producers and users including manufacturers, and protecting the consumer, facilitating domestic consumers, retailers, unions and professional and intern
6、ational trade, and furthering internationalorganizations, and governmental agencies. The cooperation in the field of standards.standards are used widely by industry and commerce A National Standard of Canada is a standard whichand often adopted by municipal, provincial, and federal has been approved
7、 by the Standards Council ofgovernments in their regulations, particularly in the Canada and one which reflects a reasonablefields of health, safety, building and construction, and agreement among the views of a number of capablethe environment. individuals whose collective interests provide to theI
8、ndividuals, companies, and associations across greatest practicable extent a balance ofCanada indicate their support for CSAs standards representation of producers, users, consumers, anddevelopment by volunteering their time and skills to others with relevant interests, as may be appropriateCSA Comm
9、ittee work and supporting the Associations to the subject in hand. It normally is a standardobjectives through sustaining memberships. The more which is capable of making a significant and timelythan 7000 committee volunteers and the 2000 contribution to the national interest.sustaining memberships
10、together form CSAs total Approval of a standard as a National Standard ofmembership from which its Directors are chosen. Canada indicates that a standard conforms to theSustaining memberships represent a major source of criteria and procedures established by the Standardsincome for CSAs standards de
11、velopment activities. Council of Canada. Approval does not refer to theThe Association offers certification and testing services technical content of the standard; this remains thein support of and as an extension to its standards continuing responsibility of the accrediteddevelopment activities. To
12、 ensure the integrity of its standards-development organization.certification process, the Association regularly and Those who have a need to apply standards arecontinually audits and inspects products that bear the encouraged to use National Standards of CanadaCSA Mark. whenever practicable. These
13、standards are subject In addition to its head office and laboratory complex to periodic review; therefore, users are cautioned in Toronto, CSA has regional branch offices in major to obtain the latest edition from the organizationcentres across Canada and inspection and testing preparing the standar
14、d.agencies in eight countries. Since 1919, the Association The responsibility for approving National Standards has developed the necessary expertise to meet its of Canada rests with thecorporate mission: CSA is an independent service Standards Council of Canadaorganization whose mission is to provid
15、e an open and 270 Albert Street, Suite 200effective forum for activities facilitating the exchange of Ottawa, Ontario, K1P 6N7goods and services through the use of standards, Canadacertification and related services to meet national andinternational needs.For further information on CSA services, wri
16、te toCSA International178 Rexdale BoulevardToronto, Ontario, M9W 1R3CanadaAlthough the intended primary application of this Standard is stated in its Scope, it is importantto note that it remains the responsibility of the users to judge its suitability for their particular purpose.Registered trade-m
17、ark of Canadian Standards AssociationCAN/CSA-ISO/IEC 15049-01 Information technology System and software integrity levelsMarch 2001 CSA/1CAN/CSA-ISO/IEC 15049-01Information technology Systemand software integrity levelsCSA PrefaceStandards development within the Information Technology sector is harm
18、onized with internationalstandards development. Through the CSA Technical Committee on Information Technology (TCIT),Canadians serve as the Canadian Advisory Committee (CAC) on ISO/IEC Joint Technical Committee 1 onInformation Technology (ISO/IEC JTC1) for the Standards Council of Canada (SCC), the
19、ISO memberbody for Canada and sponsor of the Canadian National Committee of the IEC. Also, as a member of theInternational Telecommunication Union (ITU), Canada participates in the International Telegraph andTelephone Consultative Committee (ITU-T).This International Standard was reviewed by the CSA
20、 TCIT under the jurisdiction of the StrategicSteering Committee on Information Technology and deemed acceptable for use in Canada. (A committeemembership list is available on request from the CSA Project Manager.) From time to time, ISO/IEC maypublish addenda, corrigenda, etc. The CSA TCIT will revi
21、ew these documents for approval and publication. For a listing, refer to the CSA Information Products catalogue or CSA Info Update or contact a CSA Salesrepresentative. This Standard has been formally approved, without modification, by these Committeesand has been approved as a National Standard of
22、Canada by the Standards Council of Canada.March 2001 CSA International 2001All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permissionof the publisher. ISO/IEC material is reprinted with permission. Inquiries regarding this National Standard
23、 of Canadashould be addressed to CSA International, 178 Rexdale Boulevard, Toronto, Ontario, M9W 1R3.INTERNATIONAL STANDARD ISOAEC 15049 First edition 1997-05 15 Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Specification
24、, functional model and information flows - Advice of charge supplementary services Technologies de Iinforma tion - Tkkcommunica tions et khange dinforma tion entre systkmes - R6seau privk - total charges with value “0” or Tree of charge” if at the time of the transfer the PISN decides that user B or
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