Broadband Integrated Services Digital Network (B-ISDN);Digital Subscriber Signalling System No. two (DSS2) protocol;Direct Dialling In (DDI) supplementary service;Part 1: Protocol specification [ITU-T Recommendation Q.2951, clause 1 (1995), modified] (Endorsed by Asociación Espanola de Normalización in December of 2022.)
NORMA vydána dne 1.12.2022
Designation standards: UNE-ETS 300661-1ED1
Publication date standards: 1.12.2022
Approximate weight : 300 g (0.66 lbs)
Country: Spanish technical standard
Kategorie: Technické normy UNE