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ETSI ETS 300 443-1
M00001349
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ETSI ETS 300 443-1 Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; B-ISDN user-network interface layer 3 specification for basic call/bearer control; Part 1: Protocol specification [ITU-T Recommendation Q.2931 (1995), modified]
standard by European Telecommunications Standards Institute, 04/01/1996
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