ES 201 235-2 : 1.2.1
Current
The latest, up-to-date edition.
SPECIFICATION OF DUAL TONE MULTI-FREQUENCY (DTMF) TRANSMITTERS AND RECEIVERS; PART 2: TRANSMITTERS
Hardcopy , PDF
English
Intellectual Property Rights
Foreword
1 Scope
2 References
3 Definitions, symbols and abbreviations
3.1 Definitions
3.2 Symbols
3.3 Abbreviations
4 DTMF Transmitter
4.1 Area of application
4.2 Signal output requirements
4.2.1 Frequency tolerances
4.2.2 Sending level
4.2.3 Unwanted frequency components when a DTMF code is
being transmitted
4.2.4 Signal timing
4.2.4.1 Tone duration
4.2.4.2 Pause duration
4.2.4.3 Rise time
4.3 Electrical characteristics
4.3.1 Speech suppression
4.3.2 Dial tone
History
Provides details that will enable manufacturers of telecommunications equipment incorporating DTMF signalling, to design the equipment such that it facilitates highly reliable signalling.
Committee |
AT ANALOGUE
|
DocumentType |
Standard
|
Pages |
10
|
PublisherName |
European Telecommunications Standards Institute
|
Status |
Current
|
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