Question: In SMS, how does a Short Message Service Center (SC) determine supported data formats within the Extended Object IE for a specific terminal, utilizing an SMS-DELIVER PDU?
Option 1: By including a Terminal Capability Request IE in the SMS-SUBMIT PDU.
Option 2: Through a separate SMS-Bearer-Data-Request PDU sent to the terminal.
Option 3: Via a USSD (Unstructured Supplementary Service Data) interaction with the terminal.
Option 4: By incorporating an EMS Data Format Delivery Request IE in the SMS-DELIVER PDU, marked for automatic deletion.
Explanation: The correct approach involves utilizing existing SMS infrastructure with specific information elements (IEs) designed for such queries. Incorporating an EMS Data Format Delivery Request IE within an SMS-DELIVER PDU, set to be automatically deleted by the mobile station after processing, efficiently serves this purpose without requiring additional, separate interactions or relying on other service types like USSD.