Assuming the necessary STREAMS modules are already loaded with the kernel, you can save the following lines in your .cshrc file (C shell example) for convenience:
setenv LANG en_US.UTF-8
if ($?USER != 0 && $?prompt != 0) then
cat >! /tmp/mystreams$$ << _EOF
ttcompat
ldtterm
u8lat1
ptem
_EOF
/bin/strchg -f /tmp/mystreams$$
/bin/rm -f /tmp/mystreams$$
/bin/stty cs8 -istrip defeucw
endif
With these lines in your.cshrc file, you do not have to type all of the commands each time you use the STREAMS module. Note that the second _EOF should start from the first column of the file.