how to test for serial commonication??(minicom)

I am testing for serial comm..........
I got suggestion of minicom....
but when i fire minicom...
then i get the following error...

minicom
minicom: WARNING: configuration file not found, using defaults
Device /dev/modem access failed: No such file or directory.

I am using fedora 6 , kernel ver--2.6.18
I think it is not installed in my system ....from where to get it and and how to configure and install it...

So the trick is to configure minicom. Use the menus to set the serial port and baud rate etc.

on unix configure the minicom using command :

  1. minicom -s, in the configuration select save setup as dfl
  2. Set serial port baud rate e.g. 115200,8N1 , and serial device as /dev/ttyS0
  3. Save the configuration and run the minicom .
  4. If error comes then you can set hardware flow control to no.

I configure minicom for use with a milan swicth S-3580, i already got status online in the bottom rigth corner of the screen using minicom, but nothing is displayed in the screen. Do i have to do something else??? I am missing something??