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ES 201 235-2 : 1.2.1

Current

Current

The latest, up-to-date edition.

SPECIFICATION OF DUAL TONE MULTI-FREQUENCY (DTMF) TRANSMITTERS AND RECEIVERS; PART 2: TRANSMITTERS

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English

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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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BS 8521:2009 Specification for dual-tone multi-frequency (DTMF) signalling protocol for social alarm systems
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08/30129607 DC : DRAFT JULY 2008 BS 8521 - SPECIFICATION FOR DUAL-TONE MULTI-FREQUENCY (DTMF) SIGNALLING PROTOCOL FOR SOCIAL ALARM SYSTEMS (21TC)
TS 126 114 : 13.3.0 UNIVERSAL MOBILE TELECOMMUNICATIONS SYSTEM (UMTS); LTE; IP MULTIMEDIA SUBSYSTEM (IMS); MULTIMEDIA TELEPHONY; MEDIA HANDLING AND INTERACTION (3GPP TS 26.114 VERSION 14.7.0 RELEASE 14)
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TR 103 122 : 1.1.1 SPEECH AND MULTIMEDIA TRANSMISSION QUALITY (STQ); QOS OF CONNECTIONS FROM CURRENT TECHNOLOGIES TO LTE FOR DELAY SENSITIVE APPLICATIONS
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TR 101 182 : 1.1.1 ANALOGUE TERMINALS AND ACCESS (ATA) - DEFINITIONS, ABBREVIATIONS AND SYMBOLS

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