CEN Guide to the Use of Character Sets in EuropeTC 304

8-Bit Character Sets - EN 1922

Current edition

EN 1922 (to be published)
Information technology - Character repertoire and coding for interworking with telex services (first edition)


European Standard EN 1922 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. It describes the graphic character repertoire and control functions relevant for information interchange via Telex network equipment.

European Standard EN 1922 is a revision of European Pre-standard ENV 41504:1990.

Tutorial guidance

EN 1922 specifies two repertoires, one each for the Latin and Greek scripts. The Latin repertoire is suitable for coding by means of the 5-bit Baudot code described in the historical background in this guide and which is more properly described as CCITT International Telegraphic Alphabet No.2. The Greek repertoire is similarly suitable for coding by means of the 5-bit code specified in the Hellenic national standard ELOT 1095:1989.

EN 1922 also specifies a transformation procedure for interconverting between data coded according to these 5-bit codes and data coded in an 8-bit code according to one of the options of EN 1923.

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