Digital cellular telecommunications system (Phase 2+) (GSM); Unstructured Supplementary Service Data (USSD) - Stage 2 (GSM 03.90 version 6.0.0 release 1997)
NORMA vydaná dňa 22.1.1999
Designation standards: ETSI TS 100549-V6.0.0
Publication date standards: 22.1.1999
The number of pages: 33
Approximate weight : 99 g (0.22 lbs)
Country: European technical standard
Kategória: Technické normy ETSI