ITU T.61

T.61 is an <a href="/facts/ITU-T/9nJwkPYx">ITU-T</a> Recommendation for a <a href="/facts/Teletex/Rq6oPQst">Teletex</a> character set. T.61 predated <a href="/facts/Unicode/DDu3MfPV">Unicode</a>,
and was the primary character set in <a href="/facts/Abstract_syntax_notation_one/ryUN7doc">ASN.1</a> used in early versions of <a href="/facts/X.500/zaeao2Lf">X.500</a> and <a href="/facts/X.509/rs0JuYDd">X.509</a>
for encoding strings containing characters used in Western European languages. It is also used by older versions of <a href="/facts/LDAP/KgpfD8nR">LDAP</a>. While T.61 continues to be supported in modern versions of <a href="/facts/X.500/zaeao2Lf">X.500</a> and <a href="/facts/X.509/rs0JuYDd">X.509</a>, it has been deprecated in favor of <a href="/facts/Unicode/DDu3MfPV">Unicode</a>. 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 <a href="/facts/RSA_Security/s8kfo2SF">RSA Security</a>'s <a href="/facts/PKCS/M0swhEyc">PKCS</a> #9), the 1988-11 version of the T.61 standard itself was superseded by a never-published 1993-03 version; the 1993-03 version was withdrawn by the ITU-T. The 1988-11 version is still available.
T.61 was one of the encodings supported by <a href="/facts/Mozilla/FevL9Itn">Mozilla</a> software in <a href="/facts/Email/6pD9GLtI">email</a> and <a href="/facts/HTML/sSc3fT78">HTML</a> until 2014, when the supported encodings were limited to those in the <a href="/facts/WHATWG/WoyKwRJR">WHATWG</a> Encoding Standard (although T.61 remained supported for <a href="/facts/LDAP/KgpfD8nR">LDAP</a>).

ITU T.61 open-in-new

ITU T.61