CONTENTS

 1     Scope
 2     Introduction
 3     Service model
 4     Accounting model
        4.1     Statement of limitation
        4.2     DMOs and resource usage recording
        4.3     Accounting elements
        4.4     Settlement formula
 5     Accounting elements for settlement
        5.1     DSP directory requests
        5.2     DSP results returned
 6     Accounting and settlement arrangements
        6.1     Net Balance settlement
        6.2     Transaction-Based settlement
 7     Principles of accounting and settlement
        7.1     Principles for Net Balance Settlement Arrangements
                  7.1.1     Accounting principles
                  7.1.2     Settlement principles
        7.2     Principles for Transaction-Based Settlement Arrangements
                  7.2.1     Accounting principles
                  7.2.2     Settlement principles
 8     Reverse charging
 9     Glossary of terms