Digital cellular telecommunications system (Phase 2) - Unstructured Supplementary Service Data (USSD) - Stage 2 (GSM 03.90)
STANDARD published on 1.7.1997
Designation standards: ČSN ETS 300549-ed.2
Classification mark: 872640
Catalog number: 22205
Publication date standards: 1.7.1997
The number of pages: 2
Approximate weight : 6 g (0.01 lbs)
Country: Czech technical standard
Category: Technical standards ČSN