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ETSI TS 123 014
M00004765
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ETSI TS 123 014 Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Support of Dual Tone Multi-Frequency (DTMF) signalling (3GPP TS 23.014 version 10.0.0 Release 10)
standard by European Telecommunications Standards Institute, 03/01/2011
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