ISO 6936:1988

Name: ISO 6936:1988 — Information processing — Conversion between the two coded character sets of ISO 646 and ISO 6937-2 and the CCITT international telegraph alphabet No. 2 (ITA 2)
SKU: ISO 6936:1988
Price: 25 EUR
Availability: InStock

Information processing — Conversion between the two coded character sets of ISO 646 and ISO 6937-2 and the CCITT international telegraph alphabet No. 2 (ITA 2)

Название (английский):

ISO 6936:1988

Information processing — Conversion between the two coded character sets of ISO 646 and ISO 6937-2 and the CCITT international telegraph alphabet No. 2 (ITA 2)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 5
Дата публикации:: 8 сентября 1988 г.
Издание:: ISO IS 6936 edition 2 version 1
ICS:: 35.040

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Описание (английский):

Lays down rules for converting between 58 characteristics of CCITT International Telegraph Alphabet No. 2 (Recommendation F.1) and the characters according to the ISO 646 and 6937-2 coded sets. Serves for interaction between international telex service and terminals in data networks if telex character repertoire is sufficient.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 6936:1988 specifies rules for conversion between the CCITT International Telegraph Alphabet No. 2 (ITA 2) and the coded character sets of ISO 646 and ISO 6937‑2. The standard defines mappings for the 58 ITA 2 characters (including control functions) and provides conversion tables and conventions to enable interoperability between international telex services and data‑network terminals where the telex character repertoire is sufficient.

Key Topics

Character mapping tables: Two principal tables specify ITA 2 → ISO 646/ISO 6937‑2 and ISO 646/ISO 6937‑2 → ITA 2 conversions (tables 1 and 2 in the standard).

Scope of conversion: Covers 58 ITA 2 characteristics (alphabetic and control functions) and their equivalents in ISO 646 and ISO 6937‑2.

Substitution rules:

If no direct equivalent exists, characters are to be represented by a SUB graphic or the QUESTION MARK unless alternative conventions are agreed between parties.
Non‑spacing characters in the supplementary set of ISO 6937‑2 must be removed from the character stream; other supplementary characters map to the QUESTION MARK.

Positioning (letter/sign shift):

ITA 2 uses positioning (LETTER / SIGN). When converting from ISO sets, the appropriate positioning codes must be inserted; if the current position is not the required one, the converter must prepend the necessary position character.
The standard does not mandate lowercase vs uppercase for alphabetic ITA 2 representation; lowercase or uppercase may be used but mixing is prohibited.

Control characters:

Some control positions (for example positions 011, 012, 013, etc.) are generally not converted and may be removed by convention or equipment.

National variants and annex:

Annex A provides examples of replacement conversions and notes on national adaptations where character allocations differ.

Applications

ISO 6936 is practical for:

Telex ↔ data network gateways and protocol converters that must translate between ITA 2 telex traffic and ISO‑based systems.

Telecommunications equipment vendors implementing legacy telex support in modern terminals.

Software developers and systems integrators handling archival message conversion, legacy system migration, or interoperability testing.

Network operators ensuring accurate message exchange in international telex services.

Benefits include predictable character handling, reduced formatting problems when mapping limited telex repertoires to richer ISO character sets, and documented fallbacks for unmapped characters.

Related Standards

ISO 646 - 7‑bit coded character set for information interchange

ISO 6937‑2 - Coded graphic non‑alphabetic and diacritic characters for text transmission

ISO 2022 - Techniques for extending 7/8‑bit coded sets

CCITT/ITU‑T Recommendation F.1 (ITA 2), T.50, T.51 and S.18 - referenced telegraph/telex alphabet and conversion recommendations

Keywords: ISO 6936, ITA 2, ISO 646, ISO 6937‑2, telex conversion, character set conversion, telegraph alphabet, telex gateway, character encoding.

ISO 6936:1988

Abstract

Похожие стандарты

Overview

Key Topics

Applications

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