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), mod]
STANDARD published on 1.4.1996
Designation standards: ČSN ETS 300356-19
Classification mark: 877068
Catalog number: 19463
Publication date standards: 1.4.1996
The number of pages: 2
Approximate weight : 6 g (0.01 lbs)
Country: Czech technical standard
Category: Technical standards ČSN