1、48b257L Ob45b88 545 INTERNATIONAL TELECOMMUNICATION UNION ITU-T . TEL ECO M M U N I CATI O N STANDARDIZATION SECT0 R OF ITU . X.216 Amendment 1 (08/97) SERIES X: DATA NETWORKS AND OPEN SYSTEM COM M U N I CATI O N Open System Interconnection - Service definitions Information technology - Open Systems
2、 Interconnection - Presentation service definition Amendment 1 : Efficiency enhancements ITU-T Recommendation X.216 - Amendment I (Previously CCITT Recommendation) ITU-T X-SERIES RECOMMENDATIONS DATA NETWORKS AND OPEN SYSTEM COMMUNICATION PUBLIC DATA NETWORKS Services and facilities Interfaces Trans
3、mission, signalling and switching Network aspects Maintenance Administrative arrangements OPEN SYSTEM INTERCONNECTION X.1-X. 199 X. 1 -X. 19 X .20-X. 49 X.50-X.89 X.90-X. 149 X. 150-X. 179 X.180-X. 199 X.200-X.299 Model and notation X.200-X.209 Service definitions X.210-X.219 Connection-mode protoco
4、l specifications Connectionless-mode protocol specifications PICS proforma Protocol Identification Security Protocols Layer Managed Objects Conformance testing INTERWORKING BETWEEN NETWORKS General Satellite data transmission systems MESSAGE HANDLING SYSTEMS DIRECTORY OS1 NETWORKING AND SYSTEM ASPEC
5、TS Networking Efficiency Naming, Addressing and Registration Abstract Syntax Notation One (ASN.1) OS1 MANAGEMENT Systems Management framework and architecture Management Communication Service and Protocol Structure of Management Information Management functions SECURITY OS1 APPLICATIONS Commitment,
6、Concurrency and Recovery Transaction processing Remote operations OPEN DISTRIBUTED PROCESSING X.220-X.229 X.230-X.239 X.240-X.259 X.260-X.269 X.270-X.279 X.280-X.289 X.290-X.299 X.300-X.399 X.300-X.349 X.350-X.399 X.400-X.499 X.500-X.599 X. 600-X. 699 X.600-X.629 X. 630-X. 649 X.650-X.679 X.680-X.69
7、9 X.700-X.799 X.700-X.709 X.7 10-X.7 1 9 X.720-X.729 X.730-X.799 X.800-X. 849 X.850-X.899 X.850-X.859 X.860-X.879 X.880-X. 899 X.900-X.999 For further details, please refer to ITU-T List of Recommendations 48b259L Ob45b LT3 INTERNATIONAL STANDARD 8822 ITU-T RECOMMENDATION X.216 INFORMATION TECHNOLOG
8、Y - OPEN SYSTEMS INTERCONNECTION - PRESENTATION SERVICE DEFINITION AMENDMENT 1 Efficiency enhancements Summary The fast associate (upper-layer context identifier) mechanism allows a presentation connection, and the application association it carries to be established using a compressed form of the i
9、nformation that would otherwise be sent on the P-CONNECT exchange. In this Amendment, a conceptual parameter is added which summarizes the contents of the user-data of the P-CONNECT primitives. Source The IT-T Recommendation X.216, Amendment 1 was approved on the 9th of August 1997. The identical te
10、xt is also published as ISOhEC International Standard 8822. ITU-T Rec. X.216 (1994)/Amd.l (1997 E) i FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of teiecommuni- cations. The ITU Telecommunication Standardization Sector (ITU-T) is a perma
11、nent organ of the ITU. The IT-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years,
12、 establishes the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on these topics. The approval of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 1. . In some areas of information technology which fall
13、within IT-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGH
14、TS The IT draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. The ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted
15、 by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, the ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned
16、that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. O 1T 1998 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm
17、, without permission in writing from the ITU. 11 ITU-T Rec. X.216 (1994)/Amd.l (1997 E) CONTENTS Page 1) Subclause 2.1 . 1 2) Subclause 8.2 . 1 3) Clause 10 2 4) Subclause 10.2.1 2 5) Subclause 10.2.1.1 1 . 2 6) New subclause 10.2.1.15 bis 2 7) Subclause 10.2.2.1 . 2 ITU-T Rec. X.216 (1994)/Amd.l (1
18、997 E) . 111 ISO/IEC 8822 : 1994/Amd.l : 1998 (E) INTERNATIONAL STANDARD ITU-T RECOMMENDATION INFORMATION TECHNOLOGY - OPEN SYSTEMS INTERCONNECTION - PRESENTATION SERVICE DEFINITION AMENDMENT 1 Efficiency en hancemen ts 1) Subclause 2.1 Insert the following references by numerical order: - ITU-T Rec
19、ommendation X.215 (1995)/Amd.l (1997) I ISO/IEC 8326:1996/Amd.l:1998, Information technology - Open Systems Interconnection - Session Service de$nition - Amendment I: Efficiency enhancements. ITU-T Rec. X.227 (1995)/Amd.l (1996) 1 ISOIEC 8650-1:1996/Amd.l:1997, Information technology - Open Systems
20、Interconnection - Connection-oriented protocol for the association control service element: Protocol specijcation -Amendment I: Incorporation of extensibility markers. - 2) Subclause 8.2 Modis, item a) as shown below, with the additional text underlined: a) session functional units, as defined in IT
21、U-T Rec. X.215 I ISO/IEC 8326 and ITU-T Rec. X.215iAmd.l ISO/IEC 8326Amd.1, comprising: - the kernel functional unit; - the half-duplex functional unit; - the duplex functional unit; - - - - - - the resynchronize functional unit; - - - - the exceptions functional unit; - the typed data functional un
22、it; - the no-orderly-release functional unit. The selection of session functional units which may be made is subject to the constraints imposed by the session-service, see ITU-T Rec. X.215 I ISO/IEC 8326 and ITU-T Rec. X.215/Amd. 1 I ISO/IEC 8326/Amd.l. NOTE - The decision on which session functiona
23、l units are to be used is made during presentation-connection establishment. the expedited data functional unit; the minor synchronize functional unit; the symmetric synchronize functional unit; the data separation functional unit; the major synchronize functional unit; the activity management funct
24、ional unit; the negotiated release functional unit; the capability data functional unit; ITU-T Rec. X.216 (1994)/Amd.l (1997 E) 1 ISO/IEC 8822 : 1994/Amd.l : 1998 (E) Parameter name Request 3) Clause 10 In Table 2 (Presentation service primitives), add User Summary at the end of the list of paramete
25、rs for P-CONNECT request, P-CONNECT indication und P-CONNECT responseiconfirm. Indication Response Confirm 4) Subclause 10.2.1 In Table 3 (P-CONNECT service), add a row affer User data: User Summary U C(=) U C(=) 5) Su bclause 10.2.1.1 1 Add the following text (underlined) at the end ofthe existing
26、subclause, as shown below: This parameter provides the PS-user with access to the Session requirements parameter of the Session service and is described for that parameter in ITU-T Rec. X.215 1 ISO/IEC 8326 and ITU-T Rec. X.21 YAmd.1 1 ISO/IEC 8326Amd. 1. 6) New subclause 10.2.1.15 bis Add the follo
27、wing new subclause: 10.2.1.15 bis User Summary is a parameter that summarizes the semantic content of the User data, by reference to an Upper-layer context specification. 7) Subclause 10.2.2.1 Add at the end of this subclause: If the User Summary parameter is present, the presentation-service-provid
28、er may or may not convey the semantics of the User data parameter by conveying the User Summary parameter to the responding PS-user, rather than the User data parameter itself. NOTE - If the PS-provider does not convey the User Summary parameter, or the responding PS-user is unable to interpret the
29、User Summary parameter, the User Data parameter itself will be conveyed. (This may involve a second protocol exchange.) 2 ITU-T Rec. X.216 (1994)/Arnd.l (1997 E) Series A Series B Series C Series D Series E Series F Series G Series H Series I Series J Series K Series L Series M Series N Series O Ser
30、ies P Series Q Series R Series S Series T Series U Series V Series X Series Z ITU-T RECOMMENDATIONS SERIES Organization of the work of the ITU-T Means of expression: definitions, symbols, classification General telecommunication statistics General tariff principles Overall network operation, telepho
31、ne service, service operation and human factors Non-telephone telecommunication services Transmission systems and media, digital systems and networks Audiovisual and multimedia systems Integrated services digital network Transmission of television, sound programme and other multimedia signals Protec
32、tion against interference Construction, installation and protection of cables and other elements of outside plant TMN and network maintenance: international transmission systems, telephone circuits, telegraphy, facsimile and leased circuits Maintenance: international sound programme and television t
33、ransmission circuits Specifications of measuring equipment Telephone transmission quality, telephone installations, local line networks Switching and signalling Telegraph transmission Telegraph services terminal equipment Terminals for telematic services Telegraph switching Data communication over the telephone network Data networks and open system communication Programming languages
