Digital cellular telecommunications system (Phase 2+) (GSM); Mobile radio interface layer 3 supplementary services specification; Formats and coding (GSM 04.80 version 5.3.1 Release 1996)
STANDARD published on 21.7.1999
Designation standards: ETSI ETS 300950-ed.4
Publication date standards: 21.7.1999
The number of pages: 50
Approximate weight : 150 g (0.33 lbs)
Country: European technical standard
Category: Technical standards ETSI