Private Integrated Services Network (PISN);Specification, functional models and information flows;Recall supplementary service [ISO/IEC 15051 (2003), modified] (Endorsed by Asociación Espanola de Normalización in October of 2021.)
NORMA vydána dne 1.10.2021
Designation standards: UNE-EN 301257V1.2.1
Publication date standards: 1.10.2021
Approximate weight : 300 g (0.66 lbs)
Country: Spanish technical standard
Kategorie: Technické normy UNE