Integrated Services Digital Network (ISDN);Signalling System No.7;ISDN User Part (ISUP) version 2 for the international interface;Part 12: Conference call, add-on (CONF) supplementary service [ITU-T Recommendation Q.734, clause 1 (1993), modified] (Endorsed by Asociación Espanola de Normalización in June of 2022.)
NORMA vydána dne 1.6.2022
Designation standards: UNE-ETS 300356-12ED1
Publication date standards: 1.6.2022
Approximate weight : 300 g (0.66 lbs)
Country: Spanish technical standard
Kategorie: Technické normy UNE