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ETSI TS 123 093
M00001094
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ETSI TS 123 093 Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Technical realization of Completion of Calls to Busy Subscriber (CCBS); Stage 2 (3GPP TS 23.093 version 7.3.0 Release 7)
standard by European Telecommunications Standards Institute, 06/01/2008
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