II+ upper/lowercase ?

[pads@ravel.udel.edu (Stephen J. Padbury)]

I recently received an old apple II+ with a modem. (Hayes micromodem II
300 baud) I am interested in using it for my e-mail account on the 
UNIX based mainframes at the university. As you may or may not know,
UNIX is case sensitive. The II+ refuses to have anything to do with
Upper and lower case. I also have an apple IIc. I want to have some
sort of a functioning terminal at home, but I can't attach the modem
to the IIc because it doesn't open for peripherals and the modem's
terminal functions are all on the card. To make a long story short,
HELP!!!!!!!!!!!!
Thank You Very Much,
Stephen Padbury
pads@ravel.udel.edu