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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Withdrawn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