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