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ETSI EN 300 356-2
M00001238
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ETSI EN 300 356-2 Final draft Version 4.2.1Integrated Services Digital Network (ISDN); Signalling System No. 7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 2: ISDN supplementary service [ITU-T Recommendation Q.730 (1999) modified]
standard by European Telecommunications Standards Institute, 03/01/2002
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