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ETSI TS 123 014
New product
ETSI TS 123 014 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Support of Dual Tone Multi-Frequency (DTMF) signalling (3GPP TS 23.014 version 14.0.0 Release 14)
standard by European Telecommunications Standards Institute, 03/01/2017