T.61 is an
ITU-T Recommendation for a
Teletex
Teletex was ITU-T specification F.200 for a text and document communications service that could be provided over telephone lines. It was rapidly superseded by e-mail but the name ''Teletex'' lives on in several of the X.500 standard attributes us ...
character set. T.61 predated
Unicode,
and was the primary character set in
ASN.1
Abstract Syntax Notation One (ASN.1) is a standard interface description language for defining data structures that can be serialized and deserialized in a cross-platform way. It is broadly used in telecommunications and computer networking, and ...
used in early versions of
X.500
X.500 is a series of computer networking standards covering electronic directory services. The X.500 series was developed by the Telecommunication Standardization Sector of the International Telecommunication Union (ITU-T). ITU-T was formerly kno ...
and
X.509
In cryptography, X.509 is an International Telecommunication Union (ITU) standard defining the format of public key certificates. X.509 certificates are used in many Internet protocols, including TLS/SSL, which is the basis for HTTPS, the secu ...
for encoding strings containing characters used in Western European languages. It is also used by older versions of
LDAP.
While T.61 continues to be supported in modern versions of
X.500
X.500 is a series of computer networking standards covering electronic directory services. The X.500 series was developed by the Telecommunication Standardization Sector of the International Telecommunication Union (ITU-T). ITU-T was formerly kno ...
and
X.509
In cryptography, X.509 is an International Telecommunication Union (ITU) standard defining the format of public key certificates. X.509 certificates are used in many Internet protocols, including TLS/SSL, which is the basis for HTTPS, the secu ...
, it has been deprecated in favor of
Unicode. It is also called Code page 1036, CP1036, or IBM 01036.
While ASN.1 does see wide use and the T.61 character set is used on some standards using ASN.1 (for example in
RSA Security's
PKCS #9), the 1988-11 version of the T.61 standard itself was superseded by a never-published 1993-03 version; the 1993-03 version was withdrawn by the ITU-T.
The 1988-11 version is still available.
Code page layout
The following table maps the T.61 characters to their equivalent Unicode code points.
See
ITU T.51 for a description of how the accents at
0xC0..CF worked. They prefix the letters, as opposed to postfix used by Unicode.
See also
*
ITU T.51
Footnotes
References
External links
ITU-T Recommendation T.61at ITU-T
ISO-IR-103(
ISO-IR
ISO/IEC 2022 ''Information technology—Character code structure and extension techniques'', is an ISO/IEC standard (equivalent to the ECMA standard ECMA-35, the ANSI standard ANSI X3.41 and the Japanese Industrial Standard JIS X 0202) in the f ...
registration of right-hand part)
{{character encoding
Character sets
ASN.1
T.61
T.61