B.1 Introduction

24.2063GPPStage 3TSVoice call continuity between Circuit Switched (CS) and IP Multimedia Subsystem (IMS)

This annex provides some examples of filter criterion in the S-CSCF within the user profile of a specific public user identity. This filter criterion triggers S-CSCF actions following initial filter criteria evaluation of a SIP request thus resulting in orderly invocation of application servers. These examples are meant to illustrate the placement of the application server fulfilling the role of domain transfer function in a chain of application servers invoked to service an IM session.