Private Integrated Services Network (PISN);Inter-exchange signalling protocol;Call transfer supplementary service [ISO/IEC 13869 (1995) modified] (Endorsed by Asociación Espanola de Normalización in May of 2022.)
NORMA vydána dne 1.5.2022
Designation standards: UNE-ETS 300261ED2
Publication date standards: 1.5.2022
Approximate weight : 300 g (0.66 lbs)
Country: Spanish technical standard
Kategorie: Technické normy UNE