Integrated Services Digital Network (ISDN);Direct Dialling In (DDI) supplementary service;Service Description (Endorsed by Asociación Espanola de Normalización in February of 2022.)
NORMA vydaná dňa 1.2.2022
Designation standards: UNE-ETS 300062ED1
Publication date standards: 1.2.2022
Approximate weight : 300 g (0.66 lbs)
Country: Spanish technical standard
Kategória: Technické normy UNE