1、Amendment 1:2002 toNational Standard of CanadaCAN/CSA-ISO/IEC 8073:02Amendment 1:1998 to International Standard ISO/IEC 8073:1997 has been adopted without modification asAmendment 1:2002 to CAN/CSA-ISO/IEC 8073:02. This Amendment was reviewed by the CSA TechnicalCommittee on Information Technology (
2、TCIT) under the jurisdiction of the Strategic Steering Committee onInformation Technology and deemed acceptable for use in Canada.February 2002Reference numberISO/IEC 8073:1997/Amd.1:1998(E)B CReference numberISO/IEC 8073:1997/Amd.1:1998(E)INTERNATIONALSTANDARDISO/IEC8073Fourth edition1997-08-15AMEN
3、DMENT 11998-09-15Information technology Open SystemsInterconnection Protocol for providingthe connection-mode transport serviceAMENDMENT 1: Relaxation of classconformance requirements and expediteddata service feature negotiationTechnologies de linformation Interconnexion de systmes ouverts(OSI) Pro
4、tocole assurant le service de transport en mode connexionAMENDEMENT 1: Relaxation des prescriptions de conformit de classe etngociation des caractristiques de service de donnes exprsISO/IEC 8073:1997/Amd.1:1998(E) ISO/IEC 1998All rights reserved. Unless otherwise specified, no part of this publicati
5、on may be reproduced or utilized in any form or by any means, electronic ormechanical, including photocopying and microfilm, without permission in writing from the publisher.ISO/IEC Copyright Office Case postale 56 CH-1211 Genve 20 SwitzerlandiiContents PageIntroduction 11) Clause 8 12) Subclause 12
6、.2.3.2 13) Subclause 14.2 14) Subclause 14.3 15) Subclause 14.4 26) Subclause C.6.2 27) Subclause C.9.2 28) Subclause C.9.3 29) Subclause C.9.4 210) Subclause C.9.5 211) Subclause C.10 . 2 ISO/IECISO/IEC 8073:1997/Amd.1:1998(E)iiiForewordISO (the International Organization for Standardization) and I
7、EC (the International Electrotechnical Commission) form thespecialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in thedevelopment of International Standards through technical committees established by the respective organization to deal withpar
8、ticular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Otherinternational organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work.In the field of information technology, ISO and IEC have estab
9、lished a joint technical committee, ISO/IEC JTC 1. DraftInternational Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as anInternational Standard requires approval by at least 75 % of the national bodies casting a vote.Amendment 1 to ISO/I
10、EC 8073:1997 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,Subcommittee SC 33, Distributed application services, in collaboration with ITU-T. The identical text is published as ITU-TRec. X.224/Amd.1.ISO/IEC 8073:1997/Amd.1:1998(E)ITU-T Rec. X.224 (1995)/Amd.1 (1997
11、E) 1INTERNATIONAL STANDARDISO/IEC 8073 : 1997/Amd.1 : 1998 (E)ITU-T Rec. X.224 (1995)/Amd.1 (1997 E)ITU-T RECOMMENDATIONINFORMATION TECHNOLOGY OPEN SYSTEMS INTERCONNECTION PROTOCOL FOR PROVIDING THE CONNECTION-MODETRANSPORT SERVICEAMENDMENT 1Relaxation of class conformance requirements and expedited
12、 dataservice feature negotiationIntroductionThis Amendment introduces optional enhancements, to take into account the requirements of potential OSI users who do nothave a need for full implementation, by permitting relaxation of the strict conformance requirements to allow implementationswhich will
13、never need to support expedited data, or never need to operate over CONS, to still be conformant to ITU-T Rec.X.224 | ISO/IEC 8073 without necessarily implementing either or both of these facilities.1) Clause 8In Table 6, in the row of cells starting with Expedited data transfer, replace m and x by
14、o:2) Subclause 12.2.3.2Replace the existing text of item b) with:b) expedited data, if option is selected (see 6.11);3) Subclause 14.2Replace the existing text with:14.2 The system shall implement either:a) 1) for conformance to ITU-T Rec. X.224: Class 0; or2) for conformance to ISO/IEC 8073: Class
15、0, or Class 2, or both.Each of these implies operation over CONS.or:b) Class 4 over CLNS.or:c) Both a) and b).NOTE Case c) provides full interworking possibility with other transport implementations. Cases a) and b) arerestricted to operation in their respective network layer environments. Care shou
16、ld therefore be taken when choosing toimplement only a) or b).4) Subclause 14.3Replace existing text with:14.3 If the system implements class 3, or class 4 operating over CONS, it shall also implement class 2.ISO/IEC 8073:1997/Amd.1:1998(E)2 ITU-T Rec. X.224 (1995)/Amd.1 (1997 E)5) Subclause 14.4In
17、Table 9, in the row of cells starting with Expedited data transfer, replace mandatory with optional.6) Subclause C.6.2In the row for Index C4L, Status column, replace ISO:C2:O with ISO:O.1 and replace CCT:N/A with CCT:O.7) Subclause C.9.2Replace the row for Index T1F11 with:T1F11 Expedited data tran
18、sfer when operating over CONS (Network normal) 6.11.1 O Yes No8) Subclause C.9.3Replace the row for Index T2F12 with:T2F12 Expedited data transfer when operating over CONS (Network normal) 6.11.1 O Yes No9) Subclause C.9.4Replace the row for Index T3F11 with:T3F11 Expedited data transfer when operat
19、ing over CONS (Network normal) 6.11.1 O Yes No10) Subclause C.9.5Delete row for Index T4F18.Delete row for Index T4F26.Insert new row before Index T4F28:T4F34 Expedited data transfer (Network normal) 6.11.1,6.11.2 O Yes No11) Subclause C.10In the rows for Index ST11, ST12, ST15 and ST16, under the S
20、tatus column, in each, replace C1 OR C2 OR C3 OR C4 ORC4L:M by T1F11 OR T2F12 OR T3F11 OR T4F34:M.ISO/IEC 8073:1997/Amd.1:1998(E) ISO/IECICS 35.100.40Descriptors: data processing, telecommunications, information interchange, network interconnection, open systems interconnection, datatransmission, connectionless mode transmission, communication procedure, control procedures, transport layer, protocols.
