Private Telecommunication Network (PTN);Inter-exchange signalling protocol;Call transfer supplementary service (Endorsed by Asociación Espanola de Normalización in May of 2022.)
NORMA vydána dne 1.5.2022
Designation standards: UNE-ETS 300261ED1
Publication date standards: 1.5.2022
Approximate weight : 300 g (0.66 lbs)
Country: Spanish technical standard
Kategorie: Technické normy UNE