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ETSI TS 123 218
M00001489
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ETSI TS 123 218 Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia (IM) session handling; IM call model; Stage 2 (3GPP TS 23.218 version 9.2.0 Release 9)
standard by European Telecommunications Standards Institute, 06/01/2010
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