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Technische Regel

ETS 300121

Issue date: 1992 12

Integrated Services Digital Network (ISDN) - Application of the ISDN User Part (ISUP) of CCITT Signalling System No. 7 for international ISDN interconnections (ISUP version 1)

Withdrawn : 2022 02 01

Publisher:

European Telecommunications Standards Institute

Format:

Paper | 9 Pages

Language:

English