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ETSI TS 123 083
M00000827
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ETSI TS 123 083 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Call Waiting (CW) and Call Hold (HOLD) supplementary services; Stage 2 (3GPP TS 23.083 version 16.0.0 Release 16)
standard by European Telecommunications Standards Institute, 07/01/2020
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