Integrated Services Digital Network (ISDN);Public Switched Telephone Network (PSTN);Premium Rate (PRM) service;Service description (Endorsed by Asociación Espanola de Normalización in January of 2023.)
NORMA vydaná dňa 1.1.2023
Designation standards: UNE-ETS 300712ED1
Publication date standards: 1.1.2023
Approximate weight : 300 g (0.66 lbs)
Country: Spanish technical standard
Kategória: Technické normy UNE