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ETSI TS 101 235-4

Specification of Dual Tone Multi-Frequency (DTMF) Transmitters and Receivers; Part 4: Receivers for use in Terminal Equipment for end-to-end signalling
standard by European Telecommunications Standards Institute, 05/01/2000
Publisher: ETSI

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The various parts of this technical specification (TS) provide a complete set of requirements for all applications intending to use DTMF signalling.

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