Apple //c Serial Card Help Needed

[biomorph@athena.mit.edu (Bayard Wenzel)]

I've got my apple //c. It's got the built in super serial card, which
has psuedo RS232-C output (it looks like its missing some of the 
handshaking, but none of the really important ones). My questions are:

Does it use true RS232-C output voltages (-12 volts to 12 volts) or
just ttl logical signals?

And, how can I configure the baud rate of the board, parity, number of
stop bits, etc. This is not for an apple modem, just the output jack
that goes to the modem.

Thank you, 
Bayard Wenzel
biomorph@athena.mit.edu