SIST ETS 300 076 E1:2003

• Abstract:

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• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.160.99 - Other audio, video and audiovisual equipment
• ICS: 35.180 - IT Terminal and other peripheral equipment
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: ETSI ETS 300 076 ed.1 (1990-11) - Terminal Equipment (TE); Videotex Terminal Facility Identifier (TFI)

SIST ETS 300 076 E1:2003 is the Slovenian adoption of ETS 300 076 Edition 1 from ETSI. It specifies the Terminal Facility Identifier (TFI) for Videotex terminal equipment and Videotex services, so a service can query a terminal’s profile, Service Reference Model (SRM) conformance, and ability to execute a Videotex Presentation Data Element (VPDE). In practice, it tells implementers how capability information is coded, requested, and acknowledged.

What does SIST ETS 300 076 E1:2003 specify?

SIST ETS 300 076 E1:2003 specifies the coding used for the Terminal Facility Identifier (TFI) in Videotex. The document is about capability exchange: how a service asks what a terminal can do, and how the terminal answers.

The standard is organized into these main parts:

• Foreword and introduction - the purpose of the TFI and its place in the Videotex set of ETSs
• References and definitions - links to the companion ETSs that define the related Videotex functions
• Coding structure - the basic coding elements used for the TFI
• Coding - profile queries, SRM conformance, VPDE execution checks, and sound capability coding
• Defaults - the fallback behavior when a terminal does not respond

What are the key requirements of SIST ETS 300 076 E1:2003?

Identifying a terminal’s capabilities

Clause 5 defines how a service queries the TFI and how the terminal responds. The core idea is simple: send a coded request, receive a coded reply. That matters because interoperability depends on both ends using the same byte sequence.

Clause 4 states that two VPCEs are used for the TFI. Clause 5 then uses these elements to request either a terminal profile, SRM conformance, or the ability to execute a specific VPDE.

SRM conformance and profiles

Clause 5.1 assigns codes for the parts of the SRM a terminal supports, including Alphamosaic, Geometric, Photographic, Define DRCS, Define Colour, Define Format, Transparent data, Reset, Processable Data, and Timing Control. A terminal lists the parts it supports in sequence, ending with the terminator.

This matters in practice because a buyer or tester can see which Videotex functions are implemented without guessing from marketing descriptions. The clause also allows additional bytes to express future conformance levels, and it notes that Geometric sub-levels are reserved for further study.

Clause 5.2 assigns terminal profile codes, including Alphamosaic profiles, Geometric profiles, and an ASCII profile introducer. If a terminal supports more than one profile of the same display mode, it may send more than one code, and the first Alphamosaic profile is the preferred one.

Extended capability coding

Clause 5.2 also defines the Escape code (7/15) for extra capability bytes. These bytes use bitwise identification to mark capabilities such as telesoftware, transparent mode, 80 character operation, chipcard, Greek capability, and other non-Latin capabilities.

That is important because it lets a terminal describe optional functions in a compact form. The sequence ends either with the terminator or with the last capability byte, so implementers need to handle both endings correctly.

VPDE execution and sound capability

Clause 5.3 lets a service ask whether the terminal can execute a particular VPDE by sending the VPDE header between the request and response codes. The terminal replies with an acknowledge code if it can execute the element, or a negative reply if it cannot.

Clause 5.4 reserves sound capability identification for later use. It already defines a structure for block mode or framed sound, plus pairs of octets for coding algorithm and audio bitrate, using named coding methods such as PCM A-law, PCM mu-law, ADPCM, and sub-band ADPCM.

Default behavior

Clause 6 gives the fallback rule: if no response is received within the specified time for the network in use, the basic terminal used within that network is assumed. In practice, that gives systems a default behavior instead of waiting indefinitely.

What terms does SIST ETS 300 076 E1:2003 define?

• Terminal Facility Identifier (TFI) - the coded identifier used to describe a Videotex terminal’s capabilities.
• Terminal Equipment (TE) - the terminal-side equipment covered by the standard’s Videotex context.
• Service Reference Model (SRM) - the set of Videotex parts against which terminal conformance is identified.
• Videotex Presentation Data Element (VPDE) - a presentation item whose executability can be queried by the service.
• Escape code (7/15) - the code that introduces extended capability bytes in the profile sequence.
• Profiles - coded terminal descriptions such as Alphamosaic, Geometric, and ASCII-related profiles.

Who uses SIST ETS 300 076 E1:2003?

SIST ETS 300 076 E1:2003 is used by Videotex terminal manufacturers, Videotex service providers, and engineers who need terminal capability exchange to work reliably. It is also relevant to interoperability testers, protocol implementers, and quality or procurement teams checking whether a terminal matches a required Videotex profile or SRM set.

What changed in SIST ETS 300 076 E1:2003 from the previous edition?

SIST ETS 300 076 E1:2003 is identical to ETS 300 076 Edition 1.

Which standards are used with SIST ETS 300 076 E1:2003?

Standard	What it contributes
ETS 300 072	Videotex presentation layer protocol and several SRM parts, including Alphamosaic-related functions
ETS 300 073	Geometric display and Geometric profiles
ETS 300 074	Transparent data
ETS 300 075	Processable Data
CEPT T/TR 01-03	Framing reference for sound capability coding
CCITT Recommendation H.221	Framing reference for sound capability coding
CCITT Recommendation G.711	PCM A-law and PCM mu-law audio coding
CCITT Recommendation G.722	ADPCM and sub-band ADPCM audio coding

What does the SIST ETS 300 076 E1:2003 document contain?

The document contains the TFI coding structure, code assignments for SRM conformance, profile coding, and the bitwise capability format introduced by Escape code 7/15. It also includes worked examples showing how a terminal would reply to profile and VPDE queries.

Clause 5.1 and 5.2 provide the practical coding tables for SRM parts and profiles, while Clause 5.4 gives the reserved sound capability structure. The text also includes a code mapping example for a terminal supporting multiple functions, plus a history page at the end.

SLOVENSKI STANDARD
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 1
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN ETS 300 076
TELECOMMUNICATION November 1990
STANDARD
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 1990. All rights reserved.
New presentation - see History box

Page 2
ETS 300 076: November 1990
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.

Page 3
ETS 300 076: November 1990
Contents
Foreword.5
1 Introduction.5
2 References.5
3 Definitions.5
4 Coding structure.6
5 Coding.6
5.1 Conformance to the SRM .6
5.2 Profiles.7
5.3 Ability to exexcute a particular VPDE .9
5.4 Sound capabilities .10
6 Defaults.10
History.11

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ETS 300 076: November 1990
Blank page
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ETS 300 076: November 1990
Foreword
This European Telecommunication Standard (ETS) was produced by the Terminal Equipment (TE)
Technical Committee of the European Telecommunications Standards Institute (ETSI) in May 1990.
This standard 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 5 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
Tis standard and its companion ETSs are based on previous CEPT Recommendations and two of them
(Final draft ETSs 300 073 and 300 074) are CEPT Recommendations proposed as endorsed ETSs
without modification.
For the purposes of this standard, all references within the text to the following T/TE or T/CD numbers
should read (unless otherwise stated) as:
T/TE or T/CD 06-01 = ETS 300 072,
T/TE 06-02 = ETS 300 073,
T/TE 06-03 = ETS 300 074,
T/TE or T/CD 06-04 = ETS 300 075,
T/TE or T/CD 06-05 = ETS 300 076.
1 Introduction
The Terminal Facility Indentifier may be used to ascertain the capabilities of a "terminal", (where a terminal
may actually be a physical terminal or another videotex service). The TFI may be used in three ways:
[1] To determine the terminal profile and additional terminal capabilities;
[2] To determine to which parts of the Service Reference Model (SRM) the terminal
conforms;
[3] To determine whether the terminal can execute a particular Videotex
Persentation Data Element (VPDE).
2 References
ETS 300 072, ETS 300 073, ETS 300.074 and ETS 300 075.
3 Definitions
See ETS 300 072, ETS 300 073, ETS 300.074 and ETS 300 075.

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ETS 300 076: November 1990
4 Coding structure
Two VPCEs are used for the TFI: US 2/0 and US 2/1.
5 Coding
To request the terminal profile the code US 2/0 4/0 is transmitted to the terminal.
The terminal will reply with US 2/0 followed by a series of bytes from columns 4 to 7 of the code table
(profiles and capabilities), or by a series of bytes from columns 4 and 5 of the code table, (representing
the parts of the SRM to which the terminal conforms) terminating with the code 4/0 except when the
Escape code (7/15) is used (see section 5.2).
To determine whether the terminal can execute a particular VPDE, the service transmits the code US 2/0
followed by the header of the VPDE and terminated by US 2/1 to the terminal. The terminal replies with
either US 2/0 2/0 indicating it can execute the VPDE or with US 2/0 2/1 indicating it cannot execute the
VPDE.
5.1 Conformance to the SRM
The following codes have been assigned for identifying parts of the SRM.
4/0 Terminator
4/1 Alphamosaic (ETS 300 072)
4/2 Geometric (ETS 300 073)
4/3 Photographic (ETS 300 072)
4/4 Define DRCS (ETS 300 072)
4/5 Define Colour (ETS 300 072)
4/6 Define Format (ETS 300 072)
4/7 Transparent data (ETS 300 074)
4/8 Reset (ETS 300 072)
4/9 Processable Data (ETS 300 075)
4/11 Timing Control (ETS 300 072)
A terminal conforming to parts 1, 4, 5, 6, 8 and 10 would transmit:
US 2/0, 4/1, 4/4, 4/5, 4/6, 4/8, 4/10, 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 may be indicated by one or more bytes from column 3 of the code
table following the relevant byte from column 4.
For the Geometric mode (primary byte 4/2) the following sub levels will be defined:
3/0 - 3/7 reserved
3/8 - 3/15 sub-levels to be defined are for further study.
A terminal which conforms to parts 1, 2 (sub-level coded 3/9), 4, 5, 6, 8, and 10 would transmit:
US 2/0, 4/1, 4/2, 3/9, 4/4, 4/5
...