Super Serial confusion

[aiiadict@hotmail.com (Rich J.)]

Those switches are a nightmare.  You have to set the jumper
block AND the switches to switch between terminal/modem???

I got another plotter,  DIP switches on it are set for:

2400 baud
7 data bits
1 stop bit
Even parity

I cannot get the thing to work.  I get the "ERROR" light to come
on with some switch settings and I try to print to it.

I have the plotter manual.  

o Data transmission: 
     Asynchronous { DTR
                  { XON/OFF
o Data Transmission speed
     600,1200,2400 (selectable by switch)
o Stop bit
     1,1.5,2 (selection by switch)
o Parity
     even,odd, none (selection by switch)
o Data length
     7 bit, 8 bit (selection by switch)

o Electrical Characteristics

Input voltage levels +5v to +12V
                     -5V to -12v

Output voltage levels +6V typ.
                      -6V typ.


Can you suggest which switch/jumper block settings to use with
the device?

The device manual states that it is RS-232-C 

Rich