1 Scope

04.903GPPTSUnstructured Supplementary Service Data (USSD)

The present document gives the stage 3 description of the Unstructured Supplementary Service Data (USSD) operations.

The group of unstructured supplementary service data operations is divided into two different classes:

‑ Network initiated unstructured supplementary service data operations (clause 5);

‑ Mobile initiated unstructured supplementary service data operations (clause 6).