Integrated Services Digital Network (ISDN);Definition and usage of cause and location in Digital Subscriber Signalling System No. one (DSS1) and Signalling System No.7 ISDN User Part (ISUP) [ITU-T Recommendation Q.850 (1993), modified] (Endorsed by Asociación Espanola de Normalización in September of 2022.)
NORMA vydaná dňa 1.9.2022
Designation standards: UNE-ETS 300485ED1
Publication date standards: 1.9.2022
Approximate weight : 300 g (0.66 lbs)
Country: Spanish technical standard
Kategória: Technické normy UNE