ETSI ETS 300 640 ed.1 (1996-08)

Human Factors (HF); Assignment of alphabetic letters to digits on standard telephone keypad arrays

DE/HF-01031

Človeški dejavniki (HF) – Dodelitev črk (abecede) številkam na standardni telefonski tipkovnici

General Information

• Status: Published
• Publication Date: 22-Aug-1996
• Technical Committee: HF 1 - Telecommunication Services
• Current Stage: 12 - Completion
• Due Date: 28-Aug-1996
• Completion Date: 23-Aug-1996
• Ref Project: SIST ETS 300 640 E1:2003 - Human Factors (HF); Assignment of alphabetic letters to digits on standard telephone keypad arrays

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ETS 300 640 E1:2003
01-december-2003
ýORYHãNLGHMDYQLNL+)±'RGHOLWHYþUNDEHFHGHãWHYLONDPQDVWDQGDUGQL
WHOHIRQVNLWLSNRYQLFL
Human Factors (HF); Assignment of alphabetic letters to digits on standard telephone
keypad arrays
Ta slovenski standard je istoveten z: ETS 300 640 Edition 1
ICS:
33.050.10 Telefonska oprema Telephone equipment
SIST ETS 300 640 E1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 640 E1:2003

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SIST ETS 300 640 E1:2003
EUROPEAN ETS 300 640
TELECOMMUNICATION August 1996
STANDARD
Source: ETSI TC-HF Reference: DE/HF-01031
ICS: 33.020
Key words: Character, keypad, MMI, terminal
Human Factors (HF);
Assignment of alphabetic letters to digits on standard
telephone keypad arrays
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [e-mail]
Tel.: [phone] - Fax: [phone]
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 1996. All rights reserved.

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SIST ETS 300 640 E1:2003
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ETS 300 640: August 1996
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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SIST ETS 300 640 E1:2003
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ETS 300 640: August 1996
Contents
Foreword .5
Introduction.5
1 Scope .7
2 Normative references.7
3 Definitions, symbols and abbreviations.7
3.1 Definitions .7
3.2 Symbols .7
3.3 Abbreviations .8
4 Assignment of alphabetic letters to digits.8
Annex A (informative): Characteristics of the standard telephone keypad array .9
A.1 Legibility of characters .9
A.2 Size of keys.9
History.10

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SIST ETS 300 640 E1:2003
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ETS 300 640: August 1996
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SIST ETS 300 640 E1:2003
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ETS 300 640: August 1996
Foreword
This European Telecommunication Standard (ETS) has been produced by the Human Factors (HF)
Technical Committee of the European Telecommunications Standards Institute (ETSI).
Transposition dates
Date of adoption of this ETS: 7 June 1996
Date of latest announcement of this ETS (doa): 30 November 1996
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 May 1997
Date of withdrawal of any conflicting National Standard (dow): 31 May 1997
Introduction
This ETS was prepared by TC-HF in response to a request from the 20th ETSI Technical Assembly.
ITU-T and ISO/IEC have adopted an assignment of letters to digits that corresponds to that shown in
figure 1 in clause 4 (See ITU-T Recommendation E.161 [5] and ISO/IEC 9995-8 [4]). In the interests of
maximising global standardisation, ETSI will also adopt this same assignment. This further convergence
of standards should encourage manufacturers to use the standard immediately in the manufacture of
telecommunication terminals using the standard telephone keypad array.
Many existing telephone and other terminals will have assignments of letters to digits that differ from that
specified in this standard. In particular, some assignments exist which conform with national standards to
facilitate text telephony. Before introducing telecommunications services that assume the assignment
specified in the present standard, the consequences of errors arising from the use of non-compliant
terminals should be carefully considered.
For a limited user group, where it is known that all terminals using the service will have the ETSI
assignment of letters to digits, it will be possible to introduce services that use alphabetic input without
further delay.
The standard assignment of letters to digits can also serve as an aide-memoire for individ
...