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ETSI EN 300 356-2
M00000038
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ETSI EN 300 356-2 Integrated Services Digital Network (ISDN); Signalling System No.7; ISDN User Part (ISUP) version 3 for the international interface; Part 2: ISDN supplementary services [ITU-T Recommendation Q.730 (1997), modified]
standard by European Telecommunications Standards Institute, 08/01/1998
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