SIST I-ETS 300 380 E1:2003

SLOVENSKI STANDARD
SIST I-ETS 300 380 E1:2003
01-december-2003
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Universal Personal Telecommunication (UPT); Access devices Dual Tone Multi
Frequency (DTMF) sender for acoustical coupling to the microphone of a handset
telephone
Ta slovenski standard je istoveten z: I-ETS 300 380 Edition 1
ICS:
33.040.01 Telekomunikacijski sistemi Telecommunication systems
na splošno in general
SIST I-ETS 300 380 E1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST I-ETS 300 380 E1:2003

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SIST I-ETS 300 380 E1:2003
INTERIM
EUROPEAN I-ETS 300 380
TELECOMMUNICATION March 1995
STANDARD
Source: ETSI TC-TE Reference: DI/TE-04025
ICS: 33.020, 33.040.40
UPT, DTMF, Acoustical coupling
Key words:
Universal Personal Telecommunication (UPT);
Access devices
Dual Tone Multi Frequency (DTMF) sender for acoustical
coupling to the microphone of a handset telephone
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
F-06921 Sophia Antipolis CEDEX - FRANCE
Postal address:
650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Office address:
c=fr, a=atlas, p=etsi, s=secretariat - secretariat@etsi.fr
X.400: Internet:
Tel.: +33 92 94 42 00 - Fax: +33 93 65 47 16
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1995. All rights reserved.
New presentation - see History box

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I-ETS 300 380: March 1995
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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I-ETS 300 380: March 1995
Contents
Foreword .5
1 Scope .7
2 Normative references.7
3 Abbreviations.7
4 Transmission requirements.8
4.1 Signalling frequencies.8
4.2 Transmission levels .8
4.3 Duration .8
4.3.1 Manually controlled sending.8
4.3.2 Automatic controlled sending .8
4.4 Unwanted frequency components .9
5 Test specification .9
5.1 General .9
5.2 Frequencies .9
5.3 Transmission levels .9
5.4 Duration .9
5.5 Unwanted frequency components .9
Annex A (normative): Test arrangement.10
A.1 IEC 318 coupler/flat plate arrangement .10
Annex B (informative): Comments on acoustic coupling .11
B.1 Output level .11
B.2 Unwanted signals .11
B.3 Test setup.11
B.4 Level difference.11
Annex C (informative): Bibliography.12
History.13

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SIST I-ETS 300 380 E1:2003
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I-ETS 300 380: March 1995
Foreword
This Interim European Telecommunication Standard (I-ETS) was produced by the Terminal Equipment
(TE) Technical Committee of the European Telecommunications Standards Institute (ETSI).
An ETSI standard may be given I-ETS status either because it is regarded as a provisional solution ahead
of a more advanced standard, or because it is immature and requires a "trial period". The life of an I-ETS
is limited to three years after which it can be converted into an ETS, have it's life extended for a further
two years, be replaced by a new version, or be withdrawn.
Proposed announcement date
Date of latest announcement of this I-ETS (doa): 30 June 1995

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I-ETS 300 380: March 1995
1 Scope
This I-ETS defines the tone generating and acoustical characteristics of a one-way (sending) Universal
Personal Telecommunication (UPT) access device of Dual Tone Multi Frequency (DTMF) type to be
acoustically coupled to the mouthpiece of a telephone set. The characteristics specified have been
chosen to conform to the transmission requirements as specified in ETS 300 001 and, therefore, to be
generally acceptable for use in the Public Switched Telephone Network (PSTN) and Integrated Services
Digital Network (ISDN).
The I-ETS specifies a test arrangement to verify conformance. It is not possible to standardize the
physical dimensions for efficient acoustic coupling because of the wide variety of handset types in use in
Europe. When using a device conforming to this I-ETS, the electrical level to the network will depend on
the characteristics of the telephone set to which it is acoustically coupled. Annex B to this I-ETS indicates
the variation level that could be expected. A worst case scenario is that a device conforming to this I-ETS
will not ensure proper functioning.
NOTE: The specification of the functional requirements of the device is outside the scope of
this I-ETS. Information about functional requirements can be found in prETS 300
391-1.
2 Normative references
This I-ETS incorporates by dated and undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this I-ETS only when incorporated in it by amendment or revision. For undated references the
latest edition of the publication referred to applies.
[1] IEC 318: "An IEC artificial ear, of the wideband type, for the calibration of
earphones used in audiometry".
3 Abbreviations
For the purposes of this I-ETS, the following abbreviation
...