Digital cellular telecommunications system (Phase 2+) (GSM); Mobile radio interface layer 3 supplementary services specification; Formats and coding (GSM 04.80 version 5.1.1)
STANDARD published on 31.7.1998
Designation standards: ETSI ETS 300950-ed.2
Publication date standards: 31.7.1998
The number of pages: 49
Approximate weight : 147 g (0.32 lbs)
Country: European technical standard
Category: Technical standards ETSI