E.4.2.1 Introduction

29.1633GPPInterworking between the IP Multimedia (IM) Core Network (CN) subsystem and Circuit Switched (CS) networksTS

The following Clauses describe the Mn interface procedures triggered by H.245 signalling received in the IM-MGW and SIP and RTCP and BICC or ISUP signalling received in the MGCF.

All message sequence charts in these Clauses are examples.