check the Admin guide, all steps are there
please note that the commands below do not cover any data issues
If you have existing data in your server, you might need to copy out / in all data to handle the conversion properly. Also, moving to multi-byte character set might require changes to user tables.
to load, use command charset, e.g. charset -Usa -S<your ASE server> binary.srt utf8
the sort order depends on what you want, binary.srt is example if you want binary sort order
to reconfigure your sort order, change server option: default sortorder id
to reconfigure character set, change option: default character set id
after changing the sort order or character set you'll need to restart your ASE server twice