Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 12: Conference call, add-on (CONF) supplementary service [ITU-T Recommendation Q.734, clause 1 (1993) and implementors guide (1998) modified] (Endorsed by AENOR in February of 2004.)
NORM herausgegeben am 1.2.2004
Designation standards: UNE-EN 300356-12V4.2.1
Publication date standards: 1.2.2004
Approximate weight : 300 g (0.66 lbs)
Country: Spanish technical standard
Kategorie: Technische Normen UNE