N.1 MMI Mode

31.1113GPPRelease 18TSUniversal Subscriber Identity Module (USIM) Application Toolkit (USAT)

Mobile initiated USSD operation, Nentwork does not request further information

Network

ME

UICC

SEND USSD



ussd-DCS(7 bits), ussd-String

REGISTER



Facility (Invoke = ProcessUnstructuredSS-Request (ussd-DCS, ussd-String))

Release Complete



Facility (Return result = ProcessUnstructuredSS-Request (ussd-DCS, ussd-String))

TERMINAL RESPONSE



DCS, text string data object

Figure N.1

Mobile initiated USSD operation, Network requests further information

Network

ME

UICC

SEND USSD



ussd-DCS(7 bits), ussd-String

REGISTER



Facility (Invoke = ProcessUnstructuredSS-Request (ussd-DCS, ussd-String))

FACILITY



Facility (Invoke = UnstructuredSS-Request (ussd-DCS, ussd-String))

FACILITY



Facility (Return result = UnstructuredSS-Request (ussd-DCS, ussd-String))

Release Complete



Facility (Return result = ProcessUnstructuredSS-Request (ussd-DCS, ussd-String))

TERMINAL RESPONSE



DCS, text string data object

Figure N.2