Integrated Services Digital Network (ISDN);Conference call, add-on (CONF) supplementary service;Digital Subscriber Signalling System No. one (DSS1) protocol;Part 1: Protocol specification (Endorsed by Asociación Espanola de Normalización in April of 2022.)
NORMA vydaná dňa 1.4.2022
Designation standards: UNE-ETS 300185-1ED1
Publication date standards: 1.4.2022
Approximate weight : 300 g (0.66 lbs)
Country: Spanish technical standard
Kategória: Technické normy UNE