SIST EN 1922:1997

Information technology - Character repertoire and coding for interworking with Telex services

This European Standard specifies the graphic character repertoire and control functions relevant for information interchange via Telex services. It is intended to be used with and identified within other European functional standards that specify strings of coded characters for interchange of coded information between Information Processing Systems via Telex services. This standard specifies two alternative options of graphic character repertoires: Option A for Latin characters and Option B for Latin and Greek characters.

Informationstechnik - Zeichenvorrat und Codierung für die Zusammenarbeit mit Telex-Diensten

Diese Europäische Norm legt den Schriftzeichenvorrat und die Steuerfunktionen fest, die für den Informationsaustausch über Telex-Netzwerkeinrichtungen zutreffen. Diese Norm ist dazu vorgesehen, im Rahmen weiterer Europäischer Funktionsnormen angewendet und bezeichnet zu werden, die Folgen codierter Zeichen für den Austausch codierter Informationen zwischen Informationsverarbeitungssystemen festlegen. Diese Norm legt zwei alternative Optionen von Schriftzeichenvorräten fest: Option A für lateinische Zeichen und Option B für lateinische und griechische Zeichen.

Technologies de l'information - Répertoire des caracteres et codage pour l'interaction avec les services télex

Information technology - Character repertoire and coding for interworking with Telex services

General Information

• Status: Published
• Publication Date: 30-Nov-1997
• ICS: 33.050.30 - Equipment for telex, teletext, telefax
• ICS: 35.040.10 - Coding of character sets
• Technical Committee: ITC - Information technology
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-1997
• Due Date: 01-Dec-1997
• Completion Date: 01-Dec-1997
• Ref Project: EN 1922:1997 - Information technology - Character repertoire and coding for interworking with Telex services

Overview

EN 1922:1997 (CEN) defines the graphic character repertoire and control functions relevant for information interchange via Telex services. Published in 1997 and adopted nationally (for example as SIST EN 1922:1997), the standard is intended to be used with and identified within other European functional standards that specify strings of coded characters for interchange between Information Processing Systems via Telex.

The standard specifies two alternative graphic character repertoire options:

• Option A - Latin characters
• Option B - Latin and Greek characters

This scoped approach supports legacy Telex infrastructures while enabling consistent interpretation of coded character strings across systems.

Key Topics

• Character repertoire and coding: Defines which graphic characters and associated control functions are relevant for Telex interworking, ensuring a clear baseline for encoding and transmission.
• Two options (Latin; Latin+Greek): Provides flexibility for services that require Greek support in addition to the Latin repertoire.
• Interworking focus: Emphasizes interoperability between Information Processing Systems and Telex services by specifying the character set and control semantics needed for reliable exchange.
• Identification in functional standards: Designed to be referenced by other European functional standards that define the exact strings and protocols for data interchange.

Applications

EN 1922:1997 is valuable where Telex remains part of a communications or archival workflow, including:

• Legacy communication systems: Ensures consistent encoding when interfacing modern systems with Telex equipment or archives.
• Data migration and preservation: Guides accurate conversion of historical Telex records by clarifying the expected character repertoire and control functions.
• Interoperability testing: Helps test and validate systems that exchange coded character strings over Telex links or emulated Telex services.
• National implementations and equipment: Useful for equipment manufacturers and national standards bodies ensuring their Telex-related products and specifications follow a common European reference.

Benefits: clearer interoperability, reduced ambiguity in character coding, and support for both Latin-only and Latin+Greek interchange scenarios.

Related Standards

• Other European functional standards that specify coded-character strings for interchange with Telex services (EN-level functional specifications).
• National adoptions such as SIST EN 1922:1997 (Slovenian adoption) reflect the standard's national implementation.
• ICS classifications noted in related documentation: 35.040.10 (Coding of character sets) and 33.050.30 (Equipment for telex, teletext, telefax).

For implementers and archivists working with Telex data, EN 1922:1997 provides a practical and standardized basis for character coding choices and interoperable information exchange.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Information technology - Character repertoire and coding for interworking with Telex servicesInformationstechnik - Zeichenvorrat und Codierung für die Zusammenarbeit mit Telex-DienstenTechnologies de l'information - Répertoire des caracteres et codage pour l'interaction avec les services télexInformation technology - Character repertoire and coding for interworking with Telex services35.040.10Kodiranje n
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