1、STD.BSI BS ISO/IEC 704L-L-ENGL 1777 1624bb7 Ob52157 434 E BRITISH STANDARD Information technology - Open Systems Interconnection - Virtual Terminal Basic Class Protocol Part 1. Specification ICs 35.100.60 BS ISO/IEC 9041-1 1997 NO COPYING WITHOUT ES1 PERMISSI BS ISO/IEC 9041-1 : 1997 Amd. No. Nation
2、al foreword Date Text affected This British Standard reproduces verbatim ISO/iEC 9041-1 : 1997 and implements it as the UK national standard It supersedes BS ISO/iEC 9041-1 : 1990 which is withdrawn. The UK participation in its preparation was entnisted to Technical Committee ISTl.21, Open Systems I
3、nterconnection, Data Management and Open Distributed Processing, which has the responsibility to: - aid enquirem to understand the text; - present to the responsible internationaVEuropean committee any enquiries on the interpretation, or proposais for change, and keep the UK interests informed; - mo
4、nitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has
5、been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references The British Standards which implement international or European publications referred to in this document may b
6、e found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This
7、 document comprises a front cover, an inside front cover, the ISO/IEC title page, pages ii to vi, pages 1 to 69 and a back cover. This British Standard, having been prepared under the direction of the DISC Board, was published under the authority of the Standards Board and comes into effect on 15 Oc
8、tober 1997 O BSI 1997 ISBN O 580 28587 1 STD.BS1 BS ISOIIEC 9041-1-ENGL 1997 Lb24bb9 Ob521bl O92 BS ISO/IEC 9041-1 : 1997 INTERNATIONAL STANDARD ISO/IEC 9041-1 Second edition 1997-06-1 5 Information technology - Open Systems Interconnection - Virtual Terminal Basic Class Protocol - Part 1: Specifica
9、tion * rn * Technologies de linformation - Interconnexion de systmes ouverts (OsIl - Protocole de classe de base de terminal virtuel - Partie I: Spdcification Reference number ISO/IEC 9041-1 :1997(E) STD-BSI BS ISOIIEC 9041-1-ENGL 2777 m 1b24bbS Ob52Lb2 T29 BS ISO/IEC 9041-1 : 1997 Contents 1 scope
10、1 2 Normative references 1 3 Definitions 2 3.1 Global OS1 definitions . 2 3.2 Association Control Service Element defintins . 2 3.3 Presentation Layer Wce Element definitions . 2 3d Virtual Terminal Service definitions . 2 3.5 Vittual Terminal Protocol definitions 2 4 Abbreviations . 3 4.1 Virtual T
11、erminal Service abbreviations 3 4.2 Miscellaneous . 3 4.3 VT Protocol elements . 3 5 Overview 3 5.1 Virtual Terminal Service summary . 3 5.2 Model 6 5.3 Setvi assumed from the Presentation Layer 6 5.4 Service assuned from ACSE 6 5.5 Functions of the VT Protocol 7 5.6 FWocol Functional Units . 8 5.7
12、Modesofoperation . 8 5.8 AccessContrd 8 6 Protocol elements . 8 6.1 APQ NT-P-ABORT) 9 6.2 ASQ (VT-ASSOCIATE-REQ) . 9 6.3 ASR M-ASSOCIATE-RESP) 9 6.4 AUQ (VT-U-ABORT) . 10 6.5 BKQ (VT-BREAK-REQ) . IO 6.6 BKR (VT-BREAK-RESP) 10 6.7 DAQ(VT-ACK-RECEIPT) . 10 Doscriptors: data processing. information int
13、erchange . network interconnection. open systems interconnection . application layer. communication procedure. protocols . STD-BSI BS ISO/IEC 704L-l-ENGL 2777 P Lb24bb7 Ob52Lb3 b5 Is BS ISODEC 9041-1 : 1997 6.8 DLQ (VT-DELIVER) 10 6.9 ENQ (VT-END-NEG-REQ) . 10 6.10 ENR (VT-END-NEG-RESP) . 10 6.11 GT
14、Q (VTGIVE.TOKEN) 10 6.12 HDQ (VT-HIGH-PRI-DATA) . 10 6.13 NAQ (VT-NEG-ACCEPT) . 10 6.14 NW (VT-DATA) 11 6.15 NlQ (VT-NEG-INVITE) . 11 6.16 NJQ (VT.NEG.REJECT) 11 6.17 NOQ (VT-NEG-OFFER) 11 6.18 RLQ (VT-RELEASE-REQ) 11 6.19 RLR (VT-RELEASE-RESP) . 11 6.20 RTQ (VT-REQUEST-TOKEN) . 11 6.21 SNQ (VT-STAR
15、T-NEG-REQ) 11 6.22 SNR (VT-START-NEG-RESP) . 11 6.23 SPQ (VT-SWITCH-PROFILE-REQ) . 12 6.24 SPR (VT-SWITCH-PROFILE-RESP) 12 6.25 UW (VT.URGENT.DATA) 12 6.26 EXQ (VT-P-EXCEPTION-REQ) 12 6.27 EXR (VT-P-EXCEPTION-RESP) . 12 7 Procedures . 12 8 Primary procedures 13 8.1 Association Establishment . 13 8.2
16、 AgreedRel ease 13 8.3 Unconditional Termination . 13 8.4 Negotiation . 13 8.5 Data Transfer 13 8.6 Delivery Control 14 a7 Token Management 14 a8 Break 14 9 Switch Profile procedures . 21 9.1 Association Establishment . 21 9.2 AgreedRelease 21 9.3 Unconditional Termination . 21 9.4 Negotiation . 21
17、9.5 DataTransfer 21 9.6 Dewery Contrd 21 9.7 Token Management 22 9.8 Beak and Exception 22 10 Multiple Interaction Negotiation procedures . 22 10.1 Association Establishment 22 10.2 Agreed Release . 23 10.3 Unconditional Termination 23 10.4 Negotiation 23 10.5 DataTrancfer 23 10.6 Delivery Control .
18、 24 10.7 Token Management . 24 10.8 Eireakand Exception . 24 iii STD-BSI BS ISOIIEC 9041-1-ENGL 1777 W 1b24bb9 Ob52Lbq BTL W BS ISOAEC 9041-1 : 1997 11 Mapping of protocol elements . 24 11.1 Mapping to Association Control Services 25 11.2 Use o Presentation Services . 27 12 Protocol data unit struct
19、ure . 28 121 Generalformat . 28 122 General definitions 34 123 Conceptual Data Store definitions 40 12.4 Control. Sinal and Status definitions . 44 125 Device Object definitions . 47 13 Conformance . 50 13.1 Dynamic conformance requirements 50 13.2 Static conimnce requirements 50 13.3 Protocol Imple
20、mentation Conformance Statement (PICS) . 50 Annex A SateTables . 51 Al General . 51 A2 Parameters. VTPM rights and variables 51 A3 Conventions for use of state tables . 53 A4 Actions to be taken by the VTPM . 53 Annex B Defined OBJECT IDENTIFIER names . 69 iv STD-BSI BS ISOIIEC 7041-1-ENGL 1777 I Lb
21、24bb9 Ob52Lb5 738 I BS ISO/IEC 9041-1 : 1997 Foreword IS0 (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide stand- ardization. National bodies that are members of IS0 and IEC participate in the devel
22、opment of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. Is0 and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and nongovernment
23、al, in liaison with IS0 and IEC, also take pari in the work. In the field of information technology, IS0 and IEC have established a joint technical committee, ISO/IEC JTC1. Draft International Standards adopted bythe joint technical committee are circulated to national bodies for voting. Publication
24、 as an International Ctandard requires approval by at least 75% of the national bodies casting a vote. International Standard Is0 9041-1 was prepared by Joint Technial Committee IW/IEC JTCl , Information techndogy, Subcanmitee SC21, Open systems infercon- nection, data management and open distribute
25、d processing. This second edition cancels and replaces the first edition (ISO/IEC 9041-1:1990), which has been technically revised. It also incorporates Amendment 2:1992, Technical Corrigendum 1 :1992 and Technical Corrigendum 2:1993. ISO/IEC 9041 consists af the following parts, under the general t
26、itle Information techmlogy- Open Systems Interconnection - Wrtual Tminal Basic Class Protmk -Part I: Specification - Part 2: Implementation Conformance Statement (PICS) Proforma Annexes A and B form an integral part of this part of ISO/IEC 9041. V STD-BSI BS ISO/IEC 7041-1-ENGL 1977 M Lb24bb7 Ob52Lb
27、b b74 m BS ISODEC 9041-1 : 1997 Introduction ISO/IEC 9041 is one u a set u International Standards produced to facilitate the interconnection of computer systems. It is related to other International Standards in the set asdefined in the Reference Model for Open Systems Interconnection (ICOIIEC 7498
28、-1). The Reference Model subdivides the area of standardization for intercm Won into a series u layers u specification, each of manageable size. This pan of ISO/IEC 9041 defines the manner in which Wo protocol machines (called Virtual Terminal Protocol Machines or VTPMs) in the Application Layer of
29、the Reference Model for Open Systems Interconnection communicate in order to provide the Virtual Terminal Basic Class Service defined in ISOAEC 9040 making use of the Presentation Layer and of the association control service of ACSE within the Appii- cation Layer. Part 2 of ISOiIEC 9041 includes the
30、 Protocol Implementation Conformance Statement (PICS) proforma for the Virtual Terminal Basic Chsc Protocol as defined in this part of ISO/IEC 9041. vi STD-BSI BS ISO/IEC 9041-1-ENGL 1997 E Lb24bbS Ob521b7 500 D BS ISOLIEC 9041-1 : 1997 Information technology - Open Systems Interconnection - Virtual
31、 Terminal Basic Class Protocol - Part 1 : Specification 1 Scope This part of ISOIIEC 9041 specifies: a) a set o procedures for the connection-otinted transier of data, control and reference information between protocol machines which implement the functions of a provider of the Basic Class Virtual T
32、erminal Service; b) the two modes in which those procedures operate; - II = e c) the structure of protocol elements used for the transfer of data and control information and the mapping of these protocd elements onto ACSE and lower layer services; d) the means of negotiating the functional units to
33、be used by the protocd machines and the parameters of the service, e) the structure and mapping of protocol elements used for - - - - - - = * * B the transfer of data and control information. The procedues are defined in terms of: the interactions between Virtual Terminal Protocol Ma- chines through
34、 the exchange of Virtual Terminal protocol elements; the interactions between a Virtual Terminal Protocol Ma- chine and the Virtual Terminal service user in the same system through the exchange of Virtual Terminal service primitives; the interactions between a Virtual Terminal Protocol Ma- chine and
35、 the ACSE and Presentation Service providers through the exchange of service primitives. This part of ISOIIEC 9041 also specifies conformance require- ments (see clause 13) for systems implementing these prcce- dures. It does not contain tests which can be used to demonstrate this conmance. These pr
36、ocedures are applicable to instances of communica- tion between systems that support the Basic Class Virtual Terminal Service in the Application Layer o the Reference Model for Open Systems Interconnection and which wish to interconnect in an open systems environment. 2 Normative references The foll
37、owing standards contain provisions which, through reference in this text, constitute provisions of this patt of ISO/IEC 9041. At the time o publication, the editions indicated were valid. Ail standards are subject to revision. and partiesto agreements based on this part of ISOIIEC 9040 are emur- age
38、d to investigate the possibility of applying the most recent editions of the standards listed below. Members of IEC and is0 maintain registers of currently vali International Stad- ards. ISOIIEC N223994, Infonnation technology- Charactercode sttucure and extension techniques (fou 2) application laye
39、r; 3) protocoldataunit; 4) userelement Definitions of the following terms are given in ISO/IEC 10731: 5) primitive; 6) contirm(ptimitive); 7) indication (primitive); 8) request (primitive); 9) response (primitive); 10) service provider; 11) service user. 3.2 Association Control Service Element defin
40、itions This part o ISOIIEC 9041 makes use of the following terms defined in ISOIIEC 8649: 1) application association; 2) application context. 3.3 Presentation Layer Service Element definition This part o ISO/IEC 9041 makes use of the term abstract syntax which is defined in ISO/IEC 8822. 3.4 Virtual
41、 Terminal Service definitions This part of ISOIIEC 9041 uses the following definitions con- tained in ISOIIEC 9040: Amde, Asynchronous Mode; access-rule; Application VT-user; Block character-box graphic element; Context Control Object (CCO); curent-VTE; draft-VlE; Feld; Fikl Definition Comrol Object
42、 (FDCO); Field Definition Recod (FDR); Field Element; Field Entry Condition (FEC); Field Entry Event (FEE); Field Entry Instniction (FEI); Field Entry Instniction Control Object (FEICOI; Field Entry Instniction Record (FEIR); Feld Entry Pilot Control Object (FEPCO); Feld Entry Pilot Record (FEPR); F
43、ield Entry Reaction (FER); full-VE; Initial Facility Set; net-effecting; Reference Information Object (RIO); repertoire; ripple. Smode, Synchronous Mode; Terminal VT-user; Transmission Policy Control Object CrPCO); VT-association; VTcontext-value; VT-environment WE); VT-user; WE-parameter; Virtual T
44、erminal Protocol definitions For the purposes of this patt of ISO/IEC 9041 the following definitions apply. 3.5.1 protocd element: An abstract unit of infoimation, defined in clause 6, communicated between peer VTPMs, thP a) directly to an ACSE or presentation service primitive; and/or b) to a PDU t
45、ype that is conveyed by a user information paramter of ACSE or a user data parameter of the pres- entation service. 3.5.2 initiating YTPM: The VTPM that initiates an individual procedure. 3.5.3 target VTPM The VTPM to which the protocol element initiating a procedure is directed. 3.5.4 sending VTPM: The initiating VTPM for a data transfer procedure. 3.5.5 remiving YIPM: The target VTPM for a data transfer procedure. 1) Available Irom the European Computer Maniachirers Assodalion (EWA), 114 Rue du Rhne, CH 1204 Genh. Cwitzertand. 2
