Integrated Services Digital Network (ISDN);Support of CCITT Recommendation X.21, X.21 bis and X.20 bis based Data Terminal Equipments (DTEs) by an ISDN Synchronous and asynchronous terminal adaptation functions (Endorsed by Asociación Espanola de Normalización in March of 2022.)
NORMA vydaná dňa 1.3.2022
Designation standards: UNE-ETS 300103ED1
Publication date standards: 1.3.2022
Approximate weight : 300 g (0.66 lbs)
Country: Spanish technical standard
Kategória: Technické normy UNE