2. Basic handover procedure not requiring the establishment of a circuit connection between MSC-A and 3G MSC-B (GSM to UMTS)
3. Subsequent Handover from MSC-B back to 3G MSC-A (GSM to UMTS)
4. Subsequent Handover from MSC-B to 3G MSC-B’ (GSM to UMTS)
5. Subsequent Handover from MSC-B back to 3G MSC-A without circuit connections (GSM to UMTS)
6. Subsequent Handover from MSC-B to 3G MSC-B’ without circuit connections (GSM to UMTS)
7. Circuit-switched call establishment after a Basic GSM to UMTS Handover without circuit connection (GSM to UMTS)
