For modules in the Stream that do code conversion on the JIS character set (EUC-JIS, Shift-JIS, 7-bit JIS, and 8-bit JIS), the jtty command is used to turn conversion on and off.
Additionally it will set or report the values that the conversion module uses for the third character of the JIS announcement sequence. This character is part of the three-character ISO sequence for introducing JIS characters.
When used with no parameters, jtty reports the values of the JIS input and output escape characters.
-c y Turn code conversion on.
-c n Turn code conversion off.
-i c Set the third character of the JIS input escape sequence to 'c'.
-o c Set the third character of the JIS output escape sequence to 'c'.