Foreword1 Scope2 References3 Definitions, symbols and abbreviations4 Main Concept5 General Architecture6 Procedure Descriptions7 Information element contents8 Error handling procedures9 Protocol version identification10 Operational AspectsA.1 IntroductionA.2 Cx message to Diameter command mappingA.3 Cx message parameters to Diameter AVP mappingA.4 Message flowsB.1 General descriptionB.2 Service profile 9 Protocol version identification 29.2283GPPIP Multimedia (IM) Subsystem Cx and Dx InterfacesRelease 17Signalling flows and message contentsTS Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM See TS 29.229 [5].