Foreword

2 References

1 Scope

P.4 Inter-system change between A/Gb mode and S1 mode

P.5 Inter-system change between Iu mode and S1 mode

O.5 Handling of unknown, unforeseen, and erroneous protocol data

P.3 Inter-system change between A/Gb mode and Iu mode

P.2 Activation of mobility management for IMS voice termination

P.1 Introduction

O.1 Scope