Private Integrated Services Network (PISN); Inter-exchange signalling protocol; Short message service [ISO/IEC 21990 (2002) modified]
NORM herausgegeben am 16.6.2003
Designation standards: ETSI EN 301991-V1.1.1
Publication date standards: 16.6.2003
The number of pages: 5
Approximate weight : 15 g (0.03 lbs)
Country: European technical standard
Kategorie: Technische Normen ETSI