ETSI ES 201 235-2

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ETSI ES 201 235-2 English PDF Final draft Version 1.2.1Access and Terminals (AT); Specification of Dual-Tone Multi-Frequency (DTMF) Transmitters and Receivers; Part 2: Transmitters

standard published 03/01/2002 by European Telecommunications Standards Institute

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Revision of ES 210 235-2 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.