ETSI ETS 300 076 ed.2 (1992-08)

Terminal Equipment (TE); Videotex Terminal Facility Identifier (TFI)

DE/TE-01005

Terminalska oprema (TE) – Identifikator terminalskih zmožnosti sistema Videotex (TFI)

General Information

• Status: Published
• Publication Date: 05-Nov-1992
• Technical Committee: TE 1 - Telematics: Videotex and MultimediaInformation Retrieval Services
• Current Stage: 12 - Completion
• Due Date: 28-Aug-1992
• Completion Date: 06-Nov-1992
• Ref Project: SIST ETS 300 076 E2:2003 - Terminal Equipment (TE); Videotex Terminal Facility Identifier (TFI)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ETS 300 076 E2:2003
01-december-2003
Terminalska oprema (TE) – Identifikator terminalskih zmožnosti sistema Videotex
(TFI)
Terminal Equipment (TE); Videotex Terminal Facility Identifier (TFI)
Ta slovenski standard je istoveten z: ETS 300 076 Edition 2
ICS:
33.160.99 Druga avdio, video in Other audio, video and
avdiovizuelna oprema audiovisual equipment
35.180 Terminalska in druga IT Terminal and other
periferna oprema IT peripheral equipment
SIST ETS 300 076 E2:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 076 E2:2003
EUROPEAN ETS 300 076
TELECOMMUNICATION August 1992
STANDARD Second Edition
Source: ETSI TC-TE Reference: DE/TE-01005
ICS: 33.020, 33.040.40
Videotex
Key words:
Terminal Equipment (TE);
Videotex
Terminal Facility Identifier (TFI)
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 - [e-mail]
X.400: Internet:
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 1992. All rights reserved.
New presentation - see History box

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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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Contents
Foreword.5
Introduction .5
1 Scope .7
2 Normative references .7
3 Definitions.9
4 Symbols and abbreviations.9
5 Overview .10
6 Coding.10
6.1 Compatibility provision for CCITT Recommendation T.101.11
6.2 Conformance to the SRM .11
6.3 Profiles and non-Latin language capabilities. 11
6.4 Audio capabilities .14
6.5 Modem capability.15
6.6 Photographic capabilities .16
6.7 Terminal configuration delimiter .17
6.8 Non-Latin language capability.17
7 Defaults.18
8 Formal description of the terminal response .18
8.1 Introduction.18
8.2 Notation used.18
8.3 Formal description of the terminal response .18
History.21

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ETS 300 076: August 1992
Foreword
This second edition of ETS 300 076 has been prepared by the Terminal Equipment (TE) Technical
Committee of the European Telecommunications Standards Institute (ETSI).
This edition supersedes the 1990 version of this ETS which was adopted in Autumn 1990. It takes into
account the introduction of both the photographic and the audio syntax described in ETS 300 177 [8] and
ETS 300 149 [9] respectively.
This ETS describes the Terminal Facility Identifier (TFI) which may be used to ascertain the capabilities of
either a physical Videotex terminal or another Videotex service. This ETS is one of an integrated package
of 7 ETSs covering various aspects of Videotex which comprises:
ETS 300 072 Terminal Equipment (TE);
Videotex presentation layer protocol
Videotex presentation layer data syntax
ETS 300 073 Videotex presentation layer data syntax;
Geometric display
(CEPT Recommendation T/TE 06-02, Edinburgh 1988)
ETS 300 074 Videotex presentation layer data syntax transparent data;
(CEPT Recommendation T/TE 06-03, Edinburgh 1988)
ETS 300 075 Terminal Equipment (TE);
Videotex processable data
ETS 300 177 Terminal Equipment (TE);
Videotex
Photographic Syntax
ETS 300 149 Terminal Equipment (TE);
Videotex
Audio syntax
Introduction
The Terminal Facility Identifier (TFI) may be used to ascertain the capabilities of a "terminal" (where a
terminal may actually be a physical terminal or another Videotex service). Videotex terminals have not all
been designed to support all coding techniques; for example, photographic and audio, or support of
different types of local facilities such as telesoftware or various types of modems. In addition, a specific
terminal may support one or more of the defined base data syntaxes DS I, DS II or DS III. The TFI may be
used to determine:
- each of the national or regional Videotex services;
- the terminal profile and additional terminal capabilities;
- to which parts of the Service Reference Model (SRM) the terminal conforms.

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1 Scope
This European Telecommunication Standard (ETS) specifies the data syntax to be used by Videotex
services for terminal capabilities identification.
This ETS is applicable to both the Videotex service and the attached Videotex terminals. Those terminals
may be connected to the Videotex service via the Public Switched Telephone Network (PSTN) or the
Integrated Services Digital Network (ISDN). Connection of terminals to other networks is for further study.
It also applies to any equipment (e.g. another Videotex service) which acts as a Videotex terminal.
2 Normative references
This ETS incorporates by dated or 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 ETS
only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies.
[1] CCITT Recommendation F.300 (1988): "Videotex service".
[2] CCITT Recommendation T.100 (1988): "International information exchange for
interactive videotex".
[3] CCITT Recommendation T.101 (1988): "International interworking for videotex".
[4] ETS 300 072 (1990): "Terminal Equipment (TE); Videotex presentation layer
protocol, Videotex presentation layer data syntax".
[5] ETS 300 073 (1990): "Videotex presentation layer protocol; Geometric Display
(CEPT Recommendation T/TE 06-02, Edinburgh 1988)".
[6] ETS 300 074 (1990): "Videotex presentation layer protocol; Transparent data
(CEPT Recommendation T/TE 06-03, Edinburgh 1988)".
[7] ETS 300 075 (1990): "Terminal Equipment (TE); Videotex processable data".
[8] ETS 300 177: "Terminal Equipment (TE); Videotex, Photographic syntax".
[9] ETS 300 149: "Terminal Equipment (TE); Videotex, Audio syntax".
[10] CCITT Recommendation G.711 (1988): "Pulse Code Modulation of voice
frequencies".
[11] CCITT Recommendation G.721 (1988): "32 kbit/s adaptive differential pulse
code modulation (ADPCM)".
[12] CCITT Recommendation G.722 (1988): "7 kHz audio-coding within 64 kbit/s".
[13] CCITT Recommendation G.723 (1988): "Extensions of Recommendation G.721
adaptive differential pulse code modulation to 20 and 40 kbit/s for digital circuit
multiplication equipment application".
[14] CCITT Recommendation J.41 (1988): "Characteristics of equipment for the
coding of analogue high quality sound programme signals for transmission on
384 kbit/s channels".
[15] CCITT Recommendation J.42 (1988): "Characteristics of equipment for the
coding of analogue medium quality sound programme signals for transmission on
384-kbit/s channels".

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[16] I-ETS 300 036: "European digital cellular telecommunications system (phase 1);
Full-rate speech transcoding (GSM 06.10)".
[17] CCITT Recommendation V.21 (1988): "300 bits per second duplex modem
standardised for use in the general switched telephone network".
[18] CCITT Recommendation V.22 (1988): "1200 bits per second duplex modem
standardised for use in the general switched telephone network and on point-to-
point 2-wire leased telephone-type circuits".
[19] CCITT Recommendation V.22 bis (1988): "2400 bits per second duplex modem
using the frequency division technique standardised for use on the general
switched telephone network and on point-to-point 2-wire leased telephone-type
circuits".
[20] CCITT Recommendation V.23 (1988): "600/1200 bits per second modem
standardised for use in the general switched telephone network".
[21] CCITT Recommendation V.26 bis (1988): "2400/1200 bits per second modem
standardised for use in the general switched telephone network".
[22] CCITT Recommendation V.26 ter (1988): "2400 bits per second duplex modem
using the echo cancellation technique standardised for use on the general
switched telephone network and on point-to-point 2-wire leased telephone-type
circuits".
[23] CCITT Recommendation V.27 ter (1988): "4800/2400 bits per second modem
standardised for use in the general switched telephone network".
[24] CCITT Recommendation V.29 (1988): "9600 bits per second modem
standardised for use on point-to-point 4-wire leased telephone-type circuits".
[25] CCITT Recommendation V.32 (1988): "A family of 2-wire, duplex modems
operating at data signalling rates of up to 9600 bit/s for use on the general
switched telephone network and on leased telephone-type circuits".
[26] CCITT Recommendation V.33 (1988): "14 400 bits per second modem
standardised for use on point-to-point 4-wire leased telephone-type circuits".
[27] CCITT Recommendation V.17 (1990): "Recommendation for a 2-wire modem for
facsimile applications with rates up to 14 400 bit/s".
[28] CCITT Recommendation H.221 (1988): "Frame structure of a 64 kbit/s channel
in audio-visual teleservices".
[29] CCITT Recommendation V.42 (1988): "Error correcting procedures for DCEs
using asynchronous to synchronous conversion".
[30] CCITT Recommendation V.42 bis (1990): "Data compression procedures for
data circuit-terminating equipment (DCE) using error correcting procedures".
[31] ISO CD 11172-3: "Coding of moving pictures and associated audio for digital
storage media at up to about 1,5 Mbit/s - Audio part".

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3 Definitions
For the purpose of this ETS, the following definitions apply.
Capability: coding method described by the Videotex data syntax and supported by a given Videotex
terminal.
Data syntax: Videotex coding technique as described in CCITT Recommendation T.101 [3].
Facility: see "Capability".
Profile: consistent subset of the Service Reference Model.
Service Reference Model: list of functionalities a terminal should comply with.
Videotex Host Computer: refer to CCITT Recommendation F.300 [1].
4 Symbols and abbreviations
For the purpose of this ETS, the following symbols and abbreviations apply.
DRCS Dynamically Redefinable Character Set
DS I Data Syntax according to CCITT Recommendation T.101 [3], Annex B
DS II Data Syntax according to CCITT Recommendation T.101 [3], Annex C
DS III Data Syntax according to CCITT Recommendation T.101 [3], Annex D
ETS European Telecommunication Standard
ETSI European Telecommunications Standards Institute
ISDN Integrated Services Digital Network
PSTN Public Switched Telephone Network
PDE Presentation Data Element
SRM Service Reference Model
TFI Terminal Facility Identifier
US Unit Separator
VPCE Videotex Presentation Control Element
VPDE Videotex Presentation Data Element

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5 Overview
The Videotex data syntax allows for the use of a variety of different coding techniques (text, mosaics,
graphics, audio, photographic pictures, etc.).
The Videotex terminals have not all been designed to support all the possible coding techniques; some of
them are unable to display graphic or photographic images, to output audio information. Some others
partly support such facilities. Some facilities are grouped together in order to establish a so called
"Videotex profile" which represents a coherent and consistent set of functionalities and, therefore, is
intended to be supported by a large population of terminals.
In addition, terminals may be connected to different networks, use different modems, etc.
To maximise the chance of successful communication, the Videotex host computer may ask the terminal
about the capabilities it supports.
The terminal may answer indicating:
- either the data syntax and the profile(s);
- or the precise list of facilities it supports.
The coding is described in Clause 6 below and the formal description of the terminal response is given in
Clause 8.
6 Coding
To request the terminal profile, the code US 2/0 4/0 is transmitted to the terminal.
The terminal shall reply with US 2/0 followed by a series of bytes from columns 4 to 7 of the code table
and terminating with the code 4/0 except in some cases when the Escape code (7/15) is used (see
subclause 6.3).
Host Terminal
 . Identification Command: US 2/0 4/0 - - - - - - - - - >
      <- - - - US 2/0 x/y.x/y Z; TFI response.
Intermediate codes x/y shall be transmitted by the terminal between US 2/0 and the final code Z. The value
of the final code Z is described in subclause 6.3. Intermediate codes identify the capabilities of the terminal
and shall be selected from the following list:
4/1 - 4/15 = reserved for internal use of each data syntaxes DS I, DS II and DS III (DS II is
defined by this ETS)
5/0, 5/1 = audio mode (as defined in subclause 6.4)
5/2 = modem capability (as defined in subclause 6.5)
5/3 = reserved
5/4 = data syntax and profile (rank/facility) identification:
3/1 = DS I
3/2 = DS II
3/3 = DS III
3/4 to 3/13 = reserved
3/14 = private
3/15 = termination code
5/5 = photographic mode (as defined in subclause 6.6)
5/6 = support of ISO 9281 switching
5/7 - 5/15 = reserved
6/0 - 7/15 = reserved for internal use of each data syntax DS I, DS II and DS III.

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The values in the range 4/1 - 4/15 and 6/0 - 7/15 terminated by the code 3/15 are used for the profile
identification. The codes following a particular data syntax identification pertain to that particular data
syntax.
6.1 Compatibility provision for CCITT Recommendation T.101
Terminal Facility Identifier (TFI) implementations of terminals which are intended to be used in systems
where more than one data syntax is in use, should be based on CCITT Recommendation T.101 [3]. In that
case, the profile identification of data syntax II (4/1 - 4/15 and 6/0 - 7/15) are included between the codes
5/4, 3/2 and 3/15. The code 5/6 indicates the support of ISO 9281 switching. The end of the TFI response
is indicated by the value 4/0 only and not by the last capability byte (see subclause 6.3). The detailed
description is contained in CCITT Recommendation T.101 [3], § 9.2.
6.2 Conformance to the SRM
NOTE: This subclause is present within this ETS only to maintain compatibility with existing
systems.
The following codes have been assigned for identifying parts of the SRM.
4/0 Terminator
4/1 Alphamosaic (ETS 300 072 [4])
4/2 Geometric (ETS 300 073 [5])
4/3 Photographic (ETS 300 072 [4] - and for ETS 300 177 [8])
4/4 Define DRCS (ETS 300 072 [4])
4/5 Define colour (ETS 300 072 [4])
4/6 Define format (ETS 300 072 [4])
4/7 Transparent data (ETS 300 074 [6])
4/8 Reset (ETS 300 072 [4])
4/9 Processable data (ETS 300 075 [7])
4/11 Timing control (ETS 300 072 [4])
EXAMPLE: A terminal conforming to the following parts of the SRM: Alpha-mosaic, Define
DRCS, Define colour, Define format, Reset shall transmit:
US 2/0, 4/1, 4/4, 4/5, 4/6, 4/8, 4/0.
If different levels of conformance are defined in the future (as for the Geometric display or Processable
data) then the level of conformance
...