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1、4853903 060507Y 363 I NTER NATI O NAL S TA N DA R D I Z E D PROFILE ISO/IEC 1061 4-4 First edition 1995-04-1 5 Information technology - International Standardized Profile RC - X.25 protocol relaying - Part 4: P S D N sub n e two r k-d e p e n dent , media-dependen t requirements for vi rt ua I ca I
2、Is over a permanent access Technologies de linformation - Profil normalis international RC - Transmission du protocole X.25 - Partie 4: Prescriptions dpendantes du sous-rseau du PSDN, dpendantes des supports, pour appels virtuels sur accs permanent Reference number ISO/IEC ISP 10614-4:1995(E) Copyri
3、ght International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:01:16 MDTNo reproduction or networking permitted without license from IHS -,-,- 4853903 Ob05075 2 T T ISO/IEC ISP 10614-4:1995(E) Contents Pa
4、ge Foreword . iii Introduction . iv 1 Scope . 1 2 Normative references 1 3 Definitions . 2 4 Abbreviations . 3 5 Requirements 3 4 5.1 Static conformance requirements . 3 5.2 Dynamic conformance requirements . Annex A: ISPICS requirements list . 5 A.l Introduction . 5 A.2 Notation and conventions 5 A
5、.3 IPRL for ISO/IEC 8208 5 A.4 lPRL for IS0 7776 5 . Annex B: Recommendations . 6 B.l Introduction . 6 B.2 IS07776 . 6 OISO/IEC 1995 All rights reserved . Unless otherwise specified. no part of this publication may be reproduced or utilized i n any form or by any means. electronic or mechanical. inc
6、luding photocopying and microfilm. without permission in writing from the publisher . ISO/EC Copyright Office Case postale 56 CH-1211 Genve Switzerland Printed in Switzerland 11 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ct
7、r/9960866100 Not for Resale, 04/24/2007 10:01:16 MDTNo reproduction or networking permitted without license from IHS -,-,- 4853903 Ob05076 336 o ISO/IEC ISO/IEC ISP 10614-4:1995(E) Foreword IS0 (the International Organization for Standardization) and IEC (the International Electrotechnical Commissio
8、n) form a system for worldwide standardization as a whole. National bodies that are members of IS0 or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. IS0 and IE
9、C technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmentai, in liaison with IS0 and IEC, also take part in the work. In the field of information technology, IS0 and IEC have established a joint technical committee, ISO/iEC JT
10、C 1. In addition to developing International Standards, ISO/iEC JTC 1 has created a Special Group on Functional Siandardization (ISO/iEC JTC l/SGFS) for the processing of International Standardized Profiles. An International Standardized Profile is an internationally agreed, harmonized document whic
11、h identifies a standard or group of standards, together with options and parameters, necessary to accomplish a function or set of functions. Draft International Standardized Profiles are circulated to national bodies for voting. Publication as an Intcrnational Standardized Profile requires approval
12、by at least 75% of the national bodies casting a vote. International Standardized Profile ISOAEC ISP 10614-4 was prepared with the collaboration of - Asia-Oceania Workshop (AOW); - European Workshop for Open Systems (EWOS); - Open Systems Environment Implementors Workshop (OIW). ISO/IEC ISP 10614 co
13、nsists of several parts, under the general title IMormation technology - Intemational Standardized Profile RC - X.25 protocol relaying: - Part 1 : Subnetwork-independent requirements - Part 2: LAN subnetwork-dependent, media-independent requirements - Part 3: CSMAICD LAN subnetwork-dependent, media-
14、dependent requirements - Part 4: PSDN subnetwork-dependent, media-dependent requirements for virtual calls over a permanent access - Part 5: Definition o f profile RC51.1111, X.25 protocol relaying between CSMAICD LAN subnetworks and PSDNs using virtual calls over a PSTN leased line permanent access
15、 - Part 6: Definition o f profile RC51.1121, X.25 protocol relaying between CSMAICD LAN subnetworks and PSDNs using virtual calls over a digital data circuit i CSDN leased line permaneni access Annex A forms an integral part of this part of ISO/IEC ISP 10614. Annex B is for information only. . 1ll C
16、opyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:01:16 MDTNo reproduction or networking permitted without license from IHS -,-,- 4853903 0605077 072 ISO/IEC ISP 10614-4:1995(E) o ISO/IE
17、C Introduction This International Standardized Profile (ISP) is defined in accordance with the principles specified by ISO/IEC Technical Report 1oOo0, “Information technology - Framework and taxonomy of Intemational Standardized Profiles“. The context of Functional Standardization is one area in the
18、 overall field of Information Technology (IT) standardization activities, covering base standards, profiles, and registration mechanisms. A profile defines a combination of base standards that collectively perform a specific well-defined IT function. Profiles standardize the use of options and other
19、 variations in the base standards, and provide a base for the development of uniform, internationally recognized system tests. ISPs are produced not simply to “legitimize“ a particular choice of base standards and options, but to promote real system interoperability. One of the most important roles
20、for an ISP is to serve as the basis for the development (by organizations other than IS0 and IEC) of internationally recognized test methods. The development and widespread acceptance o f tests based on this and other ISPs is crucial to the successful realization of this goal. ISO/IEC ISP 10614 cons
21、ists of several parts, of which this is part 4. Part 1 of ISO/IEC ISP 10614 specifies the profile requirements that are subnetwork-independent. There are further parts which specify subnetwork-dependent and media-dependent requirements. In addition, for each individual profile there is a part of ISO
22、/EC ISP 10614 which identifies the specific requirements of that profile, making reference to appropriate material from part 1 and from the subnetwork-dependent parts. iv Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/99608
23、66100 Not for Resale, 04/24/2007 10:01:16 MDTNo reproduction or networking permitted without license from IHS -,-,- = 4853903 0605078 TO9 INTERNATIONAL STANDARDIZED PROFILE OISO/KEC ISO/IEC ISP 10614-4:1995(E) Information technology - International Standardized Profile RC - X.25 protocol relaying -
24、Part 4: PSDN subnetwork-dependent, media-dependent requirements for virtual calls over a permanent access 1 Scope This part of ISO/IEC ISP 10614 specifies subnetwork-dependent, media-dependent requirements applicable to an interworking unit using virtual calls over a permanent access to a PSDN. The
25、operation of an interworking unit may involve relaying from one subnetwork to another, and those subnetworks need not be of the same type. This part of ISO/IEC ISP 10614 applies only to communications using PSDN subnetworks with permanent access on which virtual calls are used. 2 Normative reference
26、s The following documents contain provisions which, through reference in this text, constitute provisions of this part of ISODEC ISP 10614. At the time of publication, the editions indicated were valid. Ail documents are subject to revision, and parties to agreements based on this part of ISOhEC ISP
27、 10614 are wmed against automatically applying any more recent editions of the documents listed below, since the nature of references made by ISPs to such documents is that they may be specific to a particular edition. Members of IEC and IS0 mainlain rcgisters of currently valid Iniemational Standar
28、ds and ISPs, and ITU-T maintains published editions of its current Recommendations. IS0 21 10 : 1989, Information technology - Data communication - 25-pole DTEIDCE interface connector and contact number assignments. ISO/iEC 2593 : 1993, Information technology - Telecommunications and information exc
29、hange between systems - 34-pole DTEIDCE interface connector mateability dimensions and contact number assignments. IS0 4902 : 1989, Information technology - Data communication - 37-pole DTEIDCE interface connector and contact number assignments. IS0 4903 : 1989, Information technology - Data communi
30、cation - 15-pole DTEIDCE interface connector and contact number assignments. IS0 7776 : 1986, Information processing systems - Data communication - High-level data link control procedures - Description of the X.25 LAPB-compatible DTE data link procedures. 1 Copyright International Organization for S
31、tandardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:01:16 MDTNo reproduction or networking permitted without license from IHS -,-,- = 4853903 Ob05079 9Y5 ISO/IEC ISP 10614-4: 1995(E) o ISO/IEC IS0 7776 : 1986lCor.l : 1989, Inform
32、ation processing systems - Data communication - High-level data link control procedures - Description of the X.25 LAPB-compatible DTE data link procedures - Technical Corrigendum I . IS0 7776 : 1986/Cor.2 : 1989, Itformation processing systems - Data communication - High-level data link control proc
33、edures - Description of the X.25 LAPB-compatible DTE data link procedures - Technical Corrigendum 2. IS0 7776 : 1986ror.3 : 1991, Information processing systems - Data communication - High-level data link control procedures - Description of the X.25 LAPB-compatible DTE data link procedures - Technic
34、al Corrigendum 3. NOTE - These Technical Corrigenda to IS0 7776 are to apply throughout in t h i s part of ISO/IEC ISP 10614, wherever IS0 7776 itself is referenced. IS0 7776 : 1986/Amd.l : 1992, Information processing systems - Data communication - High-level data link control procedures - Descript
35、ion of the X.25 LAPB-compatible DTE data link procedures - Amendment I: Conformance requirements. ISO/IEC 8208 : 1990, Information technology - Data communications - X.25 Packet Layer Protocol for Data Terminal Equipment. ISO/IEC 8208 : 1990lAmd.3 : 1991, Information technology - Data communications
36、 - X.25 Packet Layer Protocol for Data Terminal Equipment - Amendment 3: Conformance requirements. ISO/IEC 8208 : 1990/Amd.3 : 1991/Cor. 1 : 1993, Information technology - Data communications - X.25 Packet Layer Protocol for Data Terminal Equipment - Amendment 3: Conformance requirements - Technical
37、 Corrigendum I. ITU-T Rec. X.25 : 1993, Interface between data terminal equipment (DTE) and data circuit terminating equipment (DCE) for terminais operating in the packet mode and connected to public data networks by dedicated circuit. ISO/IEC TR 1ooOO-1 : 1992, Information technology - Framework an
38、d taxonomy of International Standardized Profiles - Part I: Framework. ISO/IEC TR 1oooO-2 : 1994, Information technology - Framework and taxonomy of International Standardized Profiles - Part 2: Principles and taxonomy for OS1 Profiles. ISO/IEC ISP 10609-9 : 1992, Information technology - Internatio
39、nal Standardized Profiles TB, TC, TD and TE - Connection-mode Transport Service over connection-mode Network Service - Part 9: Subnetwork-type dependent requirements for Network Layer, Data Link Layer and Physical Layer concerning permanent access to a packet switched data network using virtual call
40、. ISO/IEC ISP 10614-1 : 1995, Information technology - International Standardized Profile RC - X.25 protocol relaying - Part I : Subnetwork-independent requirements. 3 Definitions The terms used in this part of ISO/IEC ISP 10614 are defined in the referenced base standards (see clause 2). 2 Copyrigh
41、t International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:01:16 MDTNo reproduction or networking permitted without license from IHS -,-,- o ISOEC Parameter m 4851903 Ob05080 667 Value ISO/IEC ISP 10614
42、-4:1995(E) Maximum number of bits in an I frame (Nl) Maximum number of outstanding I frames (k) Maximum number of transmissions (N2) 4 Abbreviations 2104 7 10 Abbreviations used in this part of ISO/IEC ISP 10614 are defined in the referenced base standards (see clause 2). 5 Requirements 5.1 Static c
43、onformance requirements 5.1.1 Overall requirements An implementation conforming to this part of ISO/IEC ISP 10614 shall a) b) cl 4 meet the requirements for ISO/IEC 8208 in subclause 5.1.2 below; meet the requirements for IS0 7776 in the subclause 5.1.3 below; meet the requirements for the physical
44、layer in subclause 5.1.4 below; support ai the features identified as requirements in the ISPICS requirements list in annex A. 5.1.2 ISO/IEC 8208 Thc irnplcmentation shall: a) implement operation in a DTEDCE environment. 5.1.3 IS0 7776 The implementation shall: a) b) cl support the functions require
45、d by IS0 7776; support basic (modulo 8) operation; support the parameters as depicted in table 1; Table 1 - LAPB parameter values NOTE - Parameter N1 may take a value greater than 2104 depending on packet size. 3 Copyright International Organization for Standardization Provided by IHS under license
46、with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:01:16 MDTNo reproduction or networking permitted without license from IHS -,-,- 4853903 O605083 5T3 ISO/IEC ISP 10614-4:1995(E) o ISO/IEC d) be capable of setting T1 to a value which exceeds by at least 1.6 seconds the tim
47、e taken to transmit 3 frames whose length is the value of N1. 5.1.4 Physical layer The implementation shall support the physical access by any of: a) b) cl an X.21 interface as specified in section 1.1 of IT-T Rec. X.25; an X.2lbi.s interface as specified in section 1.2 of ITU-T Rec. X.25; a V-serie
48、s interface as specified in section 1.3 of IT-T Rec. X.25. Table 2 identifies connectors which are appropriate for X.21 and X.216i.s interfaces for various data signalling ratcs. Table 2 - Connectors Data signalling rate bih 2400 4800 9600 19200 48000 64000 X.2lbis IS0 2110 IS0 2110 IS0 21 10 IS0 21
49、10 ISO/EC 2593, IS0 4902 IS0 4902 x.21 IS0 4903 IS0 4903 IS0 4903 IS0 4903 IS0 4903 IS0 4903 5.2 Dynamic conformance requirements 5.2.1 Overall requirements An implementation conforming to this part of ISODEC ISP 10614 shall: a) meet the requirements for IS0 7776 in the subclause 5.2.2 below; b) behave in accorda