一、智能网方式彩铃二、被叫端局方式彩铃三、目标网彩铃普通流程四、目标网彩铃VPMN流程五、目标网彩铃无条件呼转流程六、目标网彩铃网络忙呼转流程七、目标网彩铃无应答呼转流程被叫端局彩铃：1CRBTServerVMSC A /GMSCMS BVMSC BHLRA PartyScenario part 1: Call setup to VMSC of called partyIncoming call or Setup request (Called Party Number = MSISDNb)2. Send Routing Info3. Provide Roaming Number (PRN)4. PRN result (MSRN)5. SRI result (MSRN)6. IAM (MSRN)Scenario part 2: Call setup to CRBT (in parallel with part 3)7. IAM8. ACM (in-band info available)9. ACM (in-band info available)10. ACM / Progress11. CRBT (in-band)Scenario part 3: Paging of MS B (in parallel with part 2)12. Paging (to BSS)13. Page resp., auth., ciphering, etc.Scenario part 4: Called party answer14. Alert15. CPG16. CPG / Alert18. ANM17. Connect / Connect ack.20. REL19. ANM / Connect21. RLCStable Call使用：7002