NF ETS 300549

Digital cellular telecommunications system (Phase 2). Unstructured Supplementary Service Data (USSD). Stage 2 (GSM 03.90).

Le présent document donne la description du mécanisme de données de complément de service non structuré (USSD) qui permet à l'utilisateur d'une station mobile GSM et à une application définie par l'opérateur de réseau mobile de communiquer d'une manière transparente pour la station mobile et les entités intermédiaires du réseau. Le mécanisme permet le développement de compléments de service propres au réseau GSM.

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