Integrated Services Digital Network (ISDN);Public Switched Telephone Network (PSTN);Virtual Card Calling (VCC);Service description (Endorsed by Asociación Espanola de Normalización in January of 2023.)
NORMA vydána dne 1.1.2023
Designation standards: UNE-ETS 300711ED1
Publication date standards: 1.1.2023
Approximate weight : 300 g (0.66 lbs)
Country: Spanish technical standard
Kategorie: Technické normy UNE