ETR 187 : 20001
Current
The latest, up-to-date edition.
Hardcopy , PDF
English
Foreword
Introduction
1 Scope
2 References
3 Definitions and abbreviations
3.1 Definitions of the names of the tones
3.2 Abbreviations
4 Description of recommended tone characteristics
4.1 Dial tone
4.2 Ringing tone
4.3 Busy tone
4.4 Congestion tone
4.5 Special information tone
4.6 Call waiting tone
4.7 Warning tone
4.8 Caller waiting tone
5 Tolerance limits of tone characteristics
Annex A: Indication tones of real information value to the
end user
A.1 Before dialling
A.2 After dialling
A.3 After a connection has been established
History
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