CONTENTS

 1     Introduction
        1.1     General
        1.2     Contents of the Q.771/Q.775-Series Recommendations
        1.3     Objectives
                  1.3.1     Definition of Transaction Capabilities
                  1.3.2     Scope of Transaction Capabilities
 2     Overview
        2.1     Terminology
        2.2     Structure of TC
                  2.2.1     Architectural concepts
                  2.2.2     Addressing issues
                  2.2.3     Management aspects
                  2.2.4     Alignment of TCAP with Recommendations X.219 and X.229 (ROSE)
                  2.2.5     Alignment of TCAP with Recommendations X.217 and X.227 (ACSE)
        2.3     TC based on a connectionless network service
                  2.3.1     Service provided by the Component sublayer
                  2.3.2     Service provided by the Transaction sublayer
 3     Service provided by TC based on a connectionless network service
        3.1     Component sublayer
                  3.1.1     Overview of Component sublayer primitives
                  3.1.2     Dialogue handling
                  3.1.3     Component handling
                  3.1.4     Abnormal situations
                  3.1.5     Component states and state transition diagrams
                  3.1.6     Mapping of Component sublayer onto Transaction sublayer
        3.2     Transaction sublayer
                  3.2.1     Overview of the Transaction sublayer primitives
                  3.2.2     Information transfer in unstructured dialogue
                  3.2.3     Transaction begin
                  3.2.4     Transaction continuation
                  3.2.5     Transaction end
                  3.2.6     Abnormal situations
                  3.2.7     Exception reporting and message return
        3.3     Services assumed from the connectionless network layer