UNE-ETS 300666-1ED1

Broadband Integrated Services Digital Network (B-ISDN);Digital Subscriber Signalling System No. two (DSS2) protocol;Connected Line Identification Restriction (COLR) supplementary service;Part 1: Protocol specification [ITU-T Recommendation Q.2951, clause 6 (1995), modified] (Endorsed by Asociación Espanola de Normalización in December of 2022.)