Private Integrated Services Network (PISN);Inter-exchange signalling protocol;Message Waiting Indication (MWI) supplementary service [ISO/IEC 15506 (1997), modified] (Endorsed by Asociación Espanola de Normalización in October of 2021.)
NORMA vydaná dňa 1.10.2021
Designation standards: UNE-EN 301255V1.1.1
Publication date standards: 1.10.2021
Approximate weight : 300 g (0.66 lbs)
Country: Spanish technical standard
Kategória: Technické normy UNE