5 Exceptional procedures or unsuccessful outcome

22.0343GPPHigh Speed Circuit Switched Data (HSCSD)Stage 1TS

When a GBS call is offered to an entity (either ME or network) unable to support the offered GBS call, it shall be possible, within the limitations of the service, to revert the call:

– to an GBS call the entity can support; or

– at GERAN to a GSM Phase 2 data service.