• CCITT Rec. X.212 (11/1988) – DATA LINK SERVICE DEFINITION FOR OPEN SYSTEMS INTERCONNECTION FOR CCITT APPLICATIONS
  • CONTENTS
  • 0 Introduction
    • 0.1 About this Recommendation
  • 1 Scope and field of application
  • 2 References
  • 3 Definitions
    • 3.1 OSI Reference Model Definitions
    • 3.2 Service Conventions Definitions
    • 3.3 Data Link Service Definitions
  • 4 Abbreviations
  • 5 Conventions
    • 5.1 General conventions
    • 5.2 Parameters
  • 6 Overview of the Data Link Service
  • 7 Classes and types of Data Link Service
  • 8 Features of the connection-mode Data Link Service
  • 9 Model of the connection-mode Data Link Service
    • 9.1 DLC Endpoint Connection Identification
    • 9.2 Model of a Data-link-connection
  • 10 Quality of connection-mode Data Link Service
    • 10.1 Determination of QOS for Connection-mode Service
    • 10.2 Definition of connection-mode QOS parameters
  • 11 Sequence of primitives
    • 11.1 Concepts used to define the connection-mode Data Link Service
    • 11.2 Constraints of Sequence of Primitives
  • 12 Connection establishment phase
    • 12.1 Function
    • 12.2 Types of primitives and parameters
    • 12.3 Sequence of primitives
  • 13 Connection release phase
    • 13.1 Function
    • 13.2 Types of primitive and parameters
    • 13.3 Sequence of primitives when releasing an established DLC
    • 13.4 Sequence of primitives in a DLS user rejection of DLC establishment attempt
    • 13.5 Sequence of primitives in a DLS provider rejection of a DLC establishment attempt
    • 13.6 Sequence of Primitives in a DLS User Abort of a DLC Establishment Attempt
  • 14 Data transfer phase
    • 14.1 Data transfer
    • 14.2 Reset service
  • 15 Features of the Connectionless-mode Data Link Service
  • 16 Model of the Connectionless-mode Data Link Service
    • 16.1 Model of a Data-link-connectionless-mode Data Transmission
  • 17 Quality of Connectionless-mode Service
    • 17.1 Determination of QOS for Connectionless-mode Service
    • 17.2 Definition of connectionless-mode QOS parameters
  • 18 Sequence of connectionless-mode primitives at one DLSAP
  • 19 Data transfer
    • 19.1 Function
    • 19.2 Types of primitives and parameters
    • 19.3 Sequence of primitives
  • APPENDIX I – Differences between CCITT and ISO texts
  • APPENDIX II – The relationship between the two types of Data Link Service
  • II.1 Introduction
  • II.2 What is connectionless-mode transmission
  • II.3 General architectural principles
  • APPENDIX III – Use of the X.25 LAPB-compatible DTE data link procedures to provide the connection-mode Data Link Service for ...
  • III.1 Scope and field of application
  • III.2 References
  • III.3 Definitions
  • III.4 Abbreviations
  • III.5 Overview
  • III.6 Data link connection establishment phase
  • III.7 Data link connection release phase
  • III.8 Data transfer phase - Data transfer service
  • III.9 Data transfer phase - reset service