Integrated Services Digital Network (ISDN); Signalling System No.7; ISDN User Part (ISUP) version 2 for the international interface; Part 19: Three-Party (3PTY) supplementary service [ITU-T Recommendation Q.734, clause 2 (1993), modified]
STANDARD published on 21.2.1995
Designation standards: ETSI ETS 300356-19-ed.1
Publication date standards: 21.2.1995
The number of pages: 8
Approximate weight : 24 g (0.05 lbs)
Country: European technical standard
Category: Technical standards ETSI