Table of Contents

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

Abstract

Provides details that will enable manufacturers of telecommunications equipment incorporating DTMF signalling, to design the equipment such that it facilitates highly reliable signalling.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	AT ANALOGUE