Unstructured Supplementary Service Data (USSD); Stage 3
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).