1、ITU-T RECMN*X*255 95 ia YBb259L Ob03270 3L3 INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU DATA NETWORKS AND OPEN SYSTEM COMMUNICATIONS OPEN SYSTEMS INTERCONNECTION - PICS PROFORMAS X.255 (04195) INFORMATION TECHNOLOGY - OPEN SYSTEMS INTERCONNECTION - CON
2、NECTIONLESS SESSION PROTOCOL: PROTOCOL IMPLEMENTATION CONFORMANCE STATEMENT (PICS) PROFORMA ITU-T Recommendation X.255 (Previously “CCITT Recommendation”) ITU-T RECMN*X.255 75 4862593 0603371 25T FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the fie
3、ld of telecommunications, The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the ITU. Some 179 member countries, 84 telecom operating entities, 145 scientific and industrial organizations and 38 international organizations participate in ITU-T which is the body which se
4、ts world telecommunications standards (Recommendations). The approval of Recommendations by the Members of ITU-T is covered by the procedure laid down in WTSC Resolution No. 1 (Helsinki, 1993). In addition, the World Telecommunication Standardization Conference (WTSC), which meets every four years,
5、approves Recommendations submitted to it and establishes the study programme for the following period. 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. The text of ITU-T Recommendation X.255 was
6、approved on 10th of April 1995. The identical text is also published as ISOAEC International Standard 9548-2. NOTE In this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. O ITU 1995 All rig
7、hts 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, without permission in writing from the ITU. ITU-T RECMN*X.255 95 = 48b259L Ob03372 196 = Subject area PUBLIC DATA NETWORKS ITU-T X-SERI
8、ES RECOMMENDATIONS DATA NETWORKS AND OPEN SYSTEM COMMUNICATIONS (February 1994) ORGANIZATION OF X-SERIES RECOMMENDATIONS - Recommendation Series Services and Facilities Interfaces X.1-X.19 X.20-X.49 I Transmission, Signalling and Switching I X.50-X.89 I Administrative Arrangements OPEN SYSTEMS INTER
9、CONNECTION r Network Aspects X. 180-X. 199 7 X.90-X. 149 Model and Notation Service Definitions I Maintenance I X.150-X. 179 I x.200-x.209 X.2 10-X.2 19 Conne%onless-mode Protocol Specifications PICS Proformas X.2301X.239 X.240-X.259 I Connection-mode Protocol Specifications I X.220-X.229 I Protocol
10、 Identification Security Protocols X.260-X.269 X.270-X.279 Conformance Testing INTERWORKING BETWEEN NETWORKS I Layer Managed Objects I X.280-X.289 I X.290-X.299 General Mobile Data Transmission Systems Management X.300-X.349 X.350-X.369 X.370-X. 399 MESSAGE HANDLING SYSTEMS DIRECTORY I OS1 NETWORKIN
11、G AND SYSTEM ASPECTS I I x.400-x.499 x.500-x.599 Networking Naming, Addressing and Registration X.600-X.649 X.650-X.679 Abstract Syntax Notation One (ASN.1) OS1 MANAGEMENT X.680-X.699 x.700-x.799 SECURITY X.800-X.849 OS1 APPLICATIONS Commitment, Concurrency and Recovery Transaction Processing X.850-
12、X.859 X.860-X.879 Remote Operations OPEN DISTRIBUTED PROCESSING X.880-X.899 X.900-X.999 ITU-T RECMNxX.255 95 4862593 0603373 O22 CONTENTS 1 Scope 2 Normative references . Identical Recommendations I International Standards Paired Recommendations I International Standards equivalent in technical cont
13、ents . 3 Definitions 4 Abbreviations . 5 Conformance Annex A - Protocol Implementation Conformance Statement (PICS) proforma for the connectionless session 2.1 2.2 protocol A . 1 A.2 A.3 A.4 AS A.6 A.7 Identification of PICS proforma corrigenda . Instructions A.2.1 A.2.2 Symbols. terms and abbreviat
14、ions A.2.2.1 Introduction . Purpose and structure of the proforma A.2.2.2 Prerequisite notation . A.2.2.3 Item numbering . Definitions applying to the tables in A.7 A.2.2.4 Status column A.2.2.4.1 Definitions applying to the table in A.6 A.2.2.4.2 A.2.2.5 Support column . A.2.3 Instructions for comp
15、letion . Identification of the implementation . A.3.1 Date of statement A.3.2 Implementation details Protocol identification . A.4.1 ITU-T Rec . X.235 I ISO/IEC 9548-1 protocol details A.4.2 ITU-T Rec . X.235 I ISO/IEC 9548-1 technical corrigenda implemented . Global statement of conformance . Suppo
16、rt for UD SPDU Supported parameters A.7.1 UD SPDU sender A.7.2 UD SPDU receiver Page 1 1 1 1 2 2 2 3 3 3 3 3 3 4 4 4 4 5 5 5 5 5 5 6 6 6 7 7 7 7 7 ITU-T Rec . X.255 (1995 E) i ITU-T RECMN*X=255 95 m 9862593 Ob03374 Tb9 m Summary This Recommendation I International Standard provides the Protocol Impl
17、ementation Conformance Statement (PICS) proforma for the OS1 connectionless Session protocol which is specified in Recommendation X.235. The PICS proforma represents, in tabular form, the mandatory and optional elements of the connectionless Session protocol. The PICS proforma is used to indicate th
18、e features and choices of a particular implementation of the connectionless Session protocol. 11 IT-T Rec. X.255 (1995 E) ITU-T RECMN*X.255 95 m qb2593 Ob03375 9T5 Introduction This Recommendation I International Standard is one of a set of Recommendations I International Standards produced to facil
19、itate the interconnection of information processing systems. It is related to other Recommendations and International Standards in the set as defined by the Reference Model for Open Systems Interconnection (see ITU-T Rec. X.200 I IS0 7498-1). The Reference Model subdivides the area of standardisatio
20、n for interconnection into a series of layers of specification, each of manageable size. The goal of Open Systems Interconnection is to allow, with a minimum of technical agreement outside the interconnection Recommendations and International Standards, the interconnection of information processing
21、systems: - from different manufacturers; - under different managements; - - of different technologies. of different levels of complexity; and ITU-T Rec. X.235 I ISOAEC 9548-1 specifies the connectionless session protocol. It specifies the session protocol encoding and procedures to be used to meet t
22、he needs of session-service-users. To evaluate the conformance of a particular implementation, it is necessary to have a description of the capabilities and options which have been implemented. Such a description is called a Protocol Implementation Conformance Statement (PICS). This Recommendation I
23、 International Standard includes the PICS proforma for the connectionless session protocol as defined in ITU-T Rec. X.235 I ISO/IEC 9548-1. ITU-T Rec. X.255 (1995 E) iii ITU-T RECMN*X.255 75 4862593 0603376 831 ISO/IEC 9548-2 : 1995 (E) INTERNATIONAL STANDARD ITU-T RECOMMENDATION INFORMATION TECHNOL
24、OGY - OPEN SYSTEMS INTERCONNECTION - CONNECTIONLESS SESSION PROTOCOL: PROTOCOL IMPLEMENTATION CONFORMANCE STATEMENT (PICS) PROFORMA 1 Scope This Recommendation I International Standard provides the Protocol Implementation Conformance Statement (PICS) proforma for iTU-T Rec. X.235 I ISOAEC 9548-1 in
25、compliance with the relevant requirements, and in accordance with the relevant guidance given in ITU-T Rec. X.296 I ISO/IEC 9646-7. Detail of the use of this proforma is provided in this Recommendation I International Standard. The supplier of an implementation which is claimed to conform to ITU-T R
26、ec. X.235 I ISOIEC 9548-1 is required to complete a copy of the PICS proforma provided in Annex A, and is required to provide the information necessary to identify both the supplier and the implementation. 2 Normative references The following Recommendations and International Standards contain provi
27、sions which, through reference in this text, constitute provisions of this Recommendation I International Standard. At the time of publication, the editions indicated were valid. All Recommendations and Standards are subject to revision, and parties to agreements based on this Recommendation I Inter
28、national Standard are encouraged to investigate the possibility of applying the most recent edition of the Recommendations and Standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. The Telecommunication Standardization Bureau of the ITU main
29、tains a list of currently valid IT-T Recommendations. 2.1 Identical Recommendations I Internationai Standards - ITU-T Recommendation X.200 (1994) I ISOEC 7498-1:1994, Information technology - Open Systems Interconnection - Basic Reference Model: The Basic Model. ITU-T Recommendation X.215 (1994) I I
30、SOAEC 8326: .I, Information technology - Open Systems Interconnection - Session service definition. ITU-T Recommendation X.235 (1995) I ISO/IEC 9548-1:1995, Information technology - Open Systems Interconnection - Connectionless Session protocol: Protocol specification. - - 2.2 Paired Recommendations
31、 I International Standards equivalent in technical contents - ITU-T Recommendation X.290 (1999, OSI conformance testing methodology and framework for protocol Recommendations for ITU-T applications - General concepts. ISOEC 9646- 1 : 1994, Information technology - Open Systems Interconnection - Conf
32、ormance testing methodology and framework - Part 1: General concepts. IT-T Recommendation X.2962), OSI conformance testing methodology and framework for protocol Recommendations for ITU-T applications - Implementation conformance statements. ISOEC 9646-7: 1995, Information technology - Open Systems
33、Interconnection - Conformance testing methodology and framework - Part 7: Implementation Conformance Statements. - ) To be published. 2, Presently at the stage of draft. ITU-T Rec. X.255 (1995 E) 1 3 Definitions For the purposes of this Recommendation I International Standard, the following definiti
34、ons apply: 3.1 3.2 Terms defined in ITU-T Rec. X.235 I ISO/IEC 9548-1. The following terms defined in ITU-T Rec. X.290 I ISO/IEC 9646-1: a) Implementation conformance statement; b) Implementation conformance statement proforma; c) d) PICS proforma. Protocol Implementation Conformance Statement (PICS
35、); 3.3 Additional terms: a) b) requester: The PPM that initiates a particular action. acceptor: The PPM that accepts a particular action. 4 Abbreviations For the purposes of this Recommendation I International Standard, the following abbreviations apply: ICs Implementation Conformance Statement PICS
36、 Protocol Implementation Conformance Statement PDU Protocol Data Unit SPDU Session Protocol Data Unit TSDU Transport Service Data Unit UD Unit Data 5 Conformance A conforming PICS proforma shall be technically equivalent to the ITU-T I ISOAEC published PICS proforma and shall preserve the numbering
37、and ordering of the items in the ITU-T I ISOAEC PICS proforma. A PICS which conforms to this Recommendation I International Standard shall: a) b) c) describe an implementation which conforms to ITU-T Rec. X.235 I ISOAEC 9548-1; be a conforming PICS proforma, which has been completed in accordance wi
38、th the instruction for completion given in A.2; include the information necessary to uniquely identi both the supplier and the implementation. ITU-T RECMN*X.i55 95 4862593 Ob03378 604 W ISO/IEC 9548-2 : 1995 (E) Identification of Corrigenda applied to this PICS proforma Annex A3) ITU-T Rec. X.255 (1
39、995) I ISOAEC 9548-2:1995 com: com: com: Protocol Implementation Conformance Statement (PICS) proforma for the connectionless session protocol (This annex forms an integral part of this Recommendation I International Standard) A.l The supplier of the PICS proforma shall identify any corrigenda e. Te
40、chnical Comgenda or equivalent) to the published proforma that have been applied. Suppliers of the proforma should modify the proforma, or attach relevant additional pages in order to apply the corrigenda, and then record the application of the comgenda in the table below. Identification of PICS pro
41、forma corrigenda A.2 Instructions A.2.1 The purpose of this PICS proforma is to provide suppliers of implementations of ITU-T Rec. X.235 I ISO/IEC 9548-1 with a consistent means of stating which capabilities have been implemented. The proforma is in the form of a questionnaire and consists of a set
42、of items. An item is provided for each capability for which an implementation choice is allowed. Items are also provided for major mandatory capabilities for which no implementation choice is allowed. Each item includes an item number, an item description, a status value specifying the support requi
43、rement, and room for a support answer to be provided by the supplier. This clause provides general information and instructions or completion of the proforma. Subclause A.3 is for identification of the implementation. Subclause A.4 contains the means of specifying, at a high level, the protocol and
44、corrigenda that have been implemented. Subclause AS contains the global statement of conformance. Subclause A.6 onwards contain tables in which the supplier specifies details of the implementation options chosen. A.2.2 Symbols, terms and abbreviations A.2.2.1 Introduction In order to reduce the size
45、 of tables in the PICS proforma, notations have been introduced. These have allowed the use of multi-column layout where the columns are headed Status, and Support. The definition of each is given below. Additionally, the following definitions apply: (PICS) item: A row in a PICS proforma table. (PIC
46、S) question: The question to be answered in the intersection of a PICS item and either a support column (Le. “Is this item supported in the context applying to this table and column?”) or supported values column (Le. “What values are supported for this item in the context applying to this table and
47、column?) in a PICS proforma table. Purpose and structure of the proforma 3) Copyright release for PICS proformas Users of this Recommendation I International Standard may freely reproduce the PICS proforma in this annex so that it can be used for its intended purpose and may further publish the comp
48、leted PICS. ITU-T Rec. X.255 (1995 E) 3 ITU-T RECMNUX.255 75 W 4862593 Ob03379 540 ISO/IEC 9548-2 : 1995 (E) status (value): An allowed entry in the status column for an item in a PICS proforma table. (support) answer: An allowed entry in the support or supported values columns for an item in a PICS
49、, in answer to a PICS question. A.2.2.2 Prerequisite notation If a predicate applies to a whole ICs proforma table, a prerequisite line may be specified in front of the table to which it applies. A prerequisite line takes the form: Prerequisite: The meaning of such a line is that if is True, then the table applies, else it is not-applicable. A.2.23 Item numbering Each line within the PICS proforma which requires implementation detail to be entered is given an item number in the first column. The item number column provides
