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]
STANDARD published on 18.7.2001
Designation standards: ETSI EN 300356-12-V4.2.1
Publication date standards: 18.7.2001
The number of pages: 8
Approximate weight : 24 g (0.05 lbs)
Country: European technical standard
Category: Technical standards ETSI