Mobile Originated Call

An AAL2-switche core network has been assumed.

1. A request for call setup is received from the UE. Selection of an applicable MGW

2. Resources controlled by the MSC-server are reserved in the selected MGW

3. The MSC-server orders the RNC to setup a radio access bearer

4. The User plane is setup from the RNC to the MGW

5. The MSC server is informed that the user plane setup to the MGW has been completed

6. The call setup to the transit server is initiated by the MSC

7. Backward through connection of the equipment controlled by the MSC server is ordered in the MGW

8. Resources controlled by the transit server are requested from the MGW

9. Call setup to the selected PSTN switch is initiated by the transit server

10. Through connection of the transit server controlled path in the MGW is ordered