Digital cellular telecommunications system (Phase 2) (GSM). Unstructured Supplementary Service Data (USSD). Stage 2 (GSM 03.90)
STANDARD published on 1.7.2002
Designation standards: STN ETS 300549
Classification mark: 870549
Catalog number: 20332
Publication date standards: 1.7.2002
Approximate weight : 300 g (0.66 lbs)
Country: Slovak technical standard
Category: Technical standards STN