1、 STDmITU-T RECNN Xe226 AND 2-ENGL 1997 4862591 Ob50883 177 INTERNATIONAL TELECOMMUNICATION UNION ITUDT TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU X.226 Amendment 2 (1 2/97) SERIES X: DATA NETWORKS AND OPEN SYSTEM COMM UN I CATI0 N Open System Interconnection - Connection-mode protocol specifica
2、tions Information technology - Open Systems Interconnection - Connection-oriented presentation protocol: Protocol specification Amendment 2: Nested connections functional unit ITU-T Recommendation X.226 - Amendment 2 (Previously CCIlT Recommendation) ITU-T X-SERIES RECOMMENDATIONS DATA NETWORKS AND
3、OPEN SYSTEM COMMUNICATION UBLIC DATA NETWORKS Services and facilities Interfaces Transmission, signalling and switching Network aspects Maintenance Administrative arrangements )PEN SYSTEM INTERCONNECTION Model and notation Service definitions Connection-mode protocol specications Connectionless-mode
4、 protocol specifications PICS proformas 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 ASPECTS Networking Efficiency Quality of
5、 service 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 and ODMA functions SECURITY OS1 APPLICATIONS Commitme
6、nt, Concurrency and Recovery Transaction processing Remote operations OPEN DISTRIBUTED PROCESSING 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.209 X.210-X.219 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.349 X.350-X.399
7、X.400-X.499 X.500-X.599 X.600-X.629 X.630-X.639 X.640-X.649 X.650-X.679 X.680-X.699 X.700-X.709 X.7 10-X.7 19 X.720-X.729 X.730-X.799 X.800-X.849 X.850-X.859 X.860-X.879 X .8 80-X . 89 9 X.900-X.999 For further details, please refer to ITU-T List of Recommendations - STDmITU-T RECMN X.226 AND 2-ENGL
8、 1997 48b2591 0650885 T4T m INTERNATIONAL STANDARD 8823-1 ITU-T RECOMMENDATION X.226 INFORMATION TECHNOLOGY - OPEN SYSTEMS INTERCONNECTION - CONNECTION-ORIENTED PRESENTATION PROTOCOL: PROTOCOL SPECIFICATION AMENDMENT 2 Nested connections functional unit Summary The Presentation protocol specificatio
9、n defined in ITU-T Rec. X.226 I ISO/IEC 8823-1 is enhanced to support the establishment of additional, independent, nested presentation connections within an existing presentation connection. This enhancement will support the reusability of existing application layer standards (each making full, and
10、 possibly incompatible, use of the session synchronization services) as components of new application layer standards. Source The ITU-T Recommendation X.226, Amendment 2 was approved on the 12th of December 1997. The identical text is also published as ISO/IEC International Standard 8823-1, Amendmen
11、t 2. ITU-T Rec. X.226 (1994)/Amd.2 (1997 E) 1 STD*ITU-T RECMN X.226 AMD 2-ENGL 1997 4862593 Ob50886 98b FOREWORD IT (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommuni- cations. The ITU Telecommunication Standardization Sector (IT-T) is a perm
12、anent organ of the IT. The ITU-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
13、, 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 w
14、ithin ITU-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
15、TS The ITU 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 asserte
16、d by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, the IT had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned
17、that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. O ITU 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 microfil
18、m, without permission in writing from the ITU, 11 ITU-T Rec. X.226 (1994)/Amd.2 (1997 E) STD-ITU-T RECMN X.226 AND 2-ENGL I1997 4862591 Ob50887 812 CONTENTS 1) Subclause 2.1 . 2) Subclause 3.4 . 3) Subclause 5.1 . 5) Subclause 5.5 . 4) Subclause 5.2 . 6) Subclauses 6.2.2.3 through 6.2.2.6 . 7) Subcl
19、ause 8.2 . 8) Subclause A.l . ITU-T Rec . X.226 (1994)/Amd.2 (1997 E) Page 1 1 1 1 1 2 2 2 . 111 STDATU-T RECMN XJZL AND 2-ENGL iqw m 4825qi 050888 757 m ISO/IEC 8823-1 : 1994/Amd.2 : 1998 (E) INTERNATIONAL STANDARD ITU-T RECOMMENDATION INFORMATION TECHNOLOGY - OPEN SYSTEMS INTERCONNECTION - CONNECT
20、ION-ORIENTED PRESENTATION PROTOCOL: PROTOCOL SPECIFICATION AMENDMENT 2 Nested connections functional unit 1) Subclause 2.1 Insert the following to this subclause, by numerical order: - ITU-T Recommendation X.215 (1995yAmd.2 (1997) I ISO/IEC 8326:1996/Amd.2:1998, Information technology - Open Systems
21、 Interconnection - Session service definition - Amendment 2: Nested connections functional unit. ITU-T Recommendation X.216 (1994)/Amd.2 (1997) I ISOIEC 8822: 1994Amd.2: 1998, Information technology - Open Systems Interconnection - Presentation service definition - Amendment 2: Nested connections fu
22、nctional unit. - 2) Subclause 3.4 Add a new item: 1) nested presentation connection. 3) Subclause 5.1 In this subclause, add and ITU-T Rec. X.216/Amd.2 I ISO/IEC 8822/Amd.2 affer reference to ITU-T Rec. X.216 I ISO/IEC 8822. 4) Subclause 5.2 In this subclause, add and ITU-T Rec. X.21YAmd.2 I ISO/IEC
23、 8326/Amd.2 after reference to IT-T Rec. X.215 I ISO/IEC 8326. 5) Subclause 5.5 Add two new paragraphs affer paragraph one: Presentation connections can be established nested within existing presentation connections. Such connections are entirely independent in relation to services provided directly
24、 by the presentation layer, but have some dependencies (specified in ITU-T Rec. X.215 I ISO/IEC 8326) in relation to services passed through from the session layer. ITU-T Rec. X.226 (1994)/Amd.2 (1997 E) 1 - STD-ITU-T RECMN Xe226 AMD 2-ENGL 1997 48b2591 Ob50889 b95 D ISOAEC 8823-1 : 1994/Amd.2 : 199
25、8 (E) The PPM maintains a one-to-one correspondence between presentation connection end-points and session connection end-points, and the nesting structure (if any) within an outer-level session connection end-point is identical to the nesting structure within the corresponding presentation end-poin
26、t. 6) Subclauses 6.2.2.3 through 6.2.2.6 Add a new sentence to the end of each subclause 6.2.2.3 through 6.2.2.6: This parameter shall be absent on a CP that is issued on an S-CONNECT that is seeking to establish a nested session connection. 7) Subclause 8.2 In this subclause, add the following ASN.
27、1 comment afrer the X.410-mode parameters elements in CP-type, CPA-PPDU and CPR-PPDU (the parameter is erroneously named x400-mode-parameters in some places in the original pr inting) : - This OPTIONAL element shall be absent for a - nestedpresentation connection. 8) Subclause A.l Add at the end of
28、this subclause: A request or response primitive on a nested presentation connection (including a P-CONNECT request) can occur only if both the following apply: it is permitted by the state table for the PPM for that connection; the state tables for the PPM for all enclosing presentation connections
29、permit a P-DTreq event. A PPDU event can only occur on the nested session connection supporting a nested presentation connection, if both the following apply: 0 it is permitted by the state table for the PPM for that presentation connection; the state tables for the PPM for all enclosing presentatio
30、n connections permit a TD event. 2 ITU-T Rec. X.226 (1994)/Amd.2 (1997 E) leries A ieries B ;eries C Series D enes E Series F Series G Series H Series I Series J Series K Series L Series M Series N Series O Series P Series Q Series R Series S Series T Series U Series V Series X Series Y Series Z ITU
31、-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, telephone service, service operation and human factors Non-telephone telecommunication s
32、ervices 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 Protection against interference Construction, installation and protection of cables and
33、 other elements of outside plant TMN and network maintenance: international transmission systems, telephone circuits, telegraphy, facsimile and leased circuits Maintenance: intemational sound programme and television transmission circuits Specifications of measuring equipment Telephone transmission
34、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 Global information infrastructure Programming languages Printed in Switzerland Geneva, 1998
