Private Integrated Services Network (PISN);Inter-exchange signalling protocol;Short message service [ISO/IEC 21990 (2002) modified] (Endorsed by Asociación Espanola de Normalización in January of 2022.)
NORM herausgegeben am 1.1.2022
Designation standards: UNE-EN 301991V1.1.1
Publication date standards: 1.1.2022
Approximate weight : 300 g (0.66 lbs)
Country: Spanish technical standard
Kategorie: Technische Normen UNE