Rec. ITU-T X.237 (09/1992) � CONNECTIONLESS PROTOCOL SPECIFICATION FOR THE ASSOCIATION CONTROL SERVICE ELEMENT
FOREWORD
CONTENTS
Introduction
1 Scope
2 Normative references
    2.1 Paired Recommendations | International Standards equivalent in technical content
    2.2 Additional references
3 Definitions
    3.1 Reference model definitions
    3.2 Naming and addressing definitions
    3.3 Service conventions definitions
    3.4 Presentation service definitions
    3.5 ACSE service definitions
    3.6 Application Layer Structure definitions
4 Abbreviations
    4.1 Data units
    4.2 Types of application-protocol-data-units
    4.3 Other abbreviations
5 Conventions
6 Overview of the protocol
    6.1 Service provision
    6.2 Use of the presentation-service
    6.3 Model
7 Elements of procedure
    7.1 A-UNIT-DATA transfer
        7.1.1 Purpose
        7.1.2 APDUs used
        7.1.3 A-UNIT-DATA transfer procedure
        7.1.4 Use of the AUDT APDU fields
        7.1.5 Collisions and interactions
    7.2 Rules for extensibility
8 Mapping to the connectionless presentation-service
    8.1 A-UNIT-DATA transfer
        8.1.1 Directly mapped parameters
        8.1.2 Use of other P-UNIT-DATA request and indication parameters
9 Abstract Syntax Definition of APDUs
10 Conformance
    10.1 Statement requirements
    10.2 Static requirements
    10.3 Dynamic requirements
11 Precedence
ANNEX A � State table
A.1 General
A.2 Conventions
A.3 Actions to be taken by the ACPM
A.4 Relationship to Presentation and other ASEs
ANNEX B � Summary of Assigned Object Identifier Values