ETSI ES 201 235-3

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ETSI ES 201 235-3 English PDF Final draft Version 1.2.1Access and Terminals (AT); Specification of Dual-Tone Multi-Frequency (DTMF) Transmitters and Receivers; Part 3: Receivers

standard published 03/01/2006 by European Telecommunications Standards Institute

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Revision of ES 210 235-3 to include digital levels.The various parts of this ETSI Standard provide a complete set of requirements for all applications intending to use DTMF signalling.