• BS ISO/IEC 8878:1992

    Current The latest, up-to-date edition.

    Information technology. Telecommunications and information exchange between systems. Use of X.25 to provide the OSI connection-mode network service

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  15-11-1993

    Publisher:  British Standards Institution

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    Table of Contents - (Show below) - (Hide below)

    1. Scope
    2. Normative references
    2.1 Identical Recommendations / International Standards
    2.2 Paired Recommendations / International Standards
          equivalent in technical content
    2.3 Additional references
    3. Definitions
    3.1 Reference Model definitions
    3.2 Service Conventions definitions
    3.3 Network Service definitions
    3.4 X.25 definitions
    3.5 X.96 definitions
    4. Abbreviations
    4.1 Network Service abbreviations
    4.2 X.25 abbreviations
    5. Overview
    5.1 Elements of the X.25/PLP-1984 used to support the
          OSI CONS
    5.2 General operation of the X.25/PLP-1984 for
          supporting the OSI CONS
    6. Network connection establishment phase
    6.1 Primitive/Parameter and packet/field relationships
    6.2 Procedures
    7. Network connection release phase
    7.1 Primitive/Parameter and packet/field relationships
    7.2 Procedures
    8. Data transfer phase - Data transfer service
    8.1 Primitive/Parameter and packet/field relationships
    8.2 Procedures
    9. Data transfer phase - Receipt confirmation service
    9.1 Primitive and packet/field relationships
    9.2 Procedures
    10. Data transfer phase - Expedited data transfer
    10.1 Primitive/Parameter and packet/field relationships
    10.2 Procedures
    11. Data transfer phase - Reset service
    11.1 Primitive/Parameter and packet/field relationships
    11.2 Procedures
    12. Response to protocol violations
    13. Conformance
    13.1 Conformance requirements
    13.2 Optional features
    Annex A: X.25 (1980) Subnetwork Dependent Convergence
    A.1 Introduction
    A.2 Scope
    A.3 Abbreviations
    A.4 Overview of the protocol
    A.5 Protocol mechanisms
    A.6 Protocol description
    A.7 Protocol encoding in X.25 packets
    Annex B: Classification
    B.1 Classification of systems
    B.2 Functionality of classes
    B.3 Scenarios
    B.4 Procedures for selecting class of operation
    B.5 Interworking by relay system
    Annex C: Subnetwork Convergence Protocol for Use with
             X.25 Permanent Virtual Circuits
    C.1 Introduction and scope
    C.2 Overview
    C.3 Abbreviations
    C.4 Protocol mechanisms
    C.5 Protocol encoding for NC establishment and release
    Annex D: Protocol Implementation Conformance Statement
    D.1 Introduction
    D.2 Scope
    D.3 Normative references
    D.4 Definitions
    D.5 Abbreviations
    D.6 Protocol Implementation Conformance Statement
    D.7 Modified PICS requirements for ISO/IEC 8208
    Annex E: Additional Considerations of CONS Primitives
    E.1 Introduction
    E.2 Environment for X.25/PLP operation
    Annex F: Use of X.25/PLP NPAI
    F.1 Introduction
    F.2 Obtaining an SNPA address
    F.3 Examples of Network Address encoding
    Annex G: Transit Delay Calculations
    Annex H: Example of Priority Negotiation
    Annex I: Differences between Recommendation X.223 and
             ISO/IEC 8878

    Abstract - (Show below) - (Hide below)

    Defines two methods for providing the OSI Connection Mode Network Service (CONS) by using the X.25 Packet Level Protocol (X.25/PLP). The first method (in the main body of this standard) specifies a mapping between elements of the OSI CONS and elements of the 1984 version of the X.25/PLP (X.25 PLP 1984). The second method (in Annex A of this standard) defines a Subnetwork Dependent Convergence Protocol (SNDCP) that shall be used to provide the OSI CONS over subnetworks or with equipment using the 1980 version of the X.25/PLP. Also covers the annexes B E of this standard; the terms of definition for the OSI Network Service; the relationship between the OSI CONS and the X.25/PLP 1984 and the terms of definition for the X.25/PLP 1984.

    General Product Information - (Show below) - (Hide below)

    Committee IST/6
    Development Note Supersedes 90/65970 DC and BS 7224(1990). (07/2005)
    Document Type Standard
    Publisher British Standards Institution
    Status Current

    Standards Referenced By This Book - (Show below) - (Hide below)

    BS EN 60870-6-601:1995 Telecontrol equipment and systems. Telecontrol protocols compatible with ISO standards and ITU-T recommendations Functional profile for providing the connection-oriented transport service in end system connected via permanent access to a packet switched data network
    BS EN 60870-6-2:1996 Telecontrol equipment and systems. Telecontrol protocols compatible with ISO standards and ITU-T recommendations Use of basic standards (OSI layers 1-4)

    Standards Referencing This Book - (Show below) - (Hide below)

    ISO/IEC 9646-2:1994 Information technology Open Systems Interconnection Conformance testing methodology and framework Part 2: Abstract Test Suite specification
    ISO/IEC 8348:2002 Information technology Open Systems Interconnection Network service definition
    ISO/TR 8509:1987 Information processing systems Open Systems Interconnection Service conventions
    ISO/IEC 9646-1:1994 Information technology Open Systems Interconnection Conformance testing methodology and framework Part 1: General concepts
    ISO/IEC 8208:2000 Information technology Data communications X.25 Packet Layer Protocol for Data Terminal Equipment
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