3GPP VCC Call Control Procedures

1. Call origination from the IM CN subsystem



2. Call origination from CS domain



3. Terminating call directed to IM CN subsystem



4. Terminating call directed to CS



5. Terminating call coming from CS domain (using CAMEL)



6. Terminating call coming in through CS domain and delivered through the CS domain (1)



7. Terminating call coming in through CS domain and delivered through the CS domain (2)



8. CS domain to IM CN subsystem call transfer



9. IM CN subsystem to CS domain call transfer