5 Exceptional procedures or unsuccessful outcome

02.343GPPHigh Speed Circuit Switched Data (HSCSD)Stage 1TS

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

– to an HSCSD call the entity can support; or

Рto a GSM Phase 2 data service.