Foreword1 Scope2 References3 Definitions and abbreviations4 Description5 Normal operation with successful outcome6 Exception procedures or unsuccessful outcome7 Alternate procedures8 Interaction with other supplementary services9 Interworking considerationsA.1 Subclause 4.1 Applicability to telecommunication servicesA.2 Subclause 5.8 Normal operationA.3 Subclause 6 Exception procedures or unsuccessful outcomeA.4 Subclause 8.6 and 8.7A.5 Annexes 7 Alternate procedures 22.0913GPPExplicit Call Transfer (ECT) supplementary serviceStage 1TS Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM For further study.