M00042158
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ACCESS AND TERMINALS (AT); SPECIFICATION OF DUAL-TONE MULTI-FREQUENCY (DTMF) TRANSMITTERS AND RECEIVERS; PART 3: RECEIVERS
European Telecommunications Standards Institute
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Availability date: 11/06/2021
Intellectual Property Rights
Foreword
1 Scope
2 References
3 Definitions, symbols and abbreviations
3.1 Definitions
3.2 Symbols
3.3 Abbreviations
4 DTMF receiver
4.1 Area of application
4.2 Operate and non-operate requirements
4.3 Speech immunity performance
4.4 Electrical characteristics
Annex A (normative): Speech immunity test signal
Annex B (informative): Example test signal
History
Presents the level of detail that will enable manufacturers of telecommunications equipment incorporating DTMF signalling, to design the equipment such that it facilitates highly reliable signalling. This should not be taken to imply that any DTMF signalling system that fails to meet all the criteria described in the present document will not provide reliable signalling.
Published | |
Document Type | Standard |
Status | Current |
Publisher | European Telecommunications Standards Institute |
Pages | |
ISBN | |
Committee | AT ANALOGUE |