I'm looking for software that can be used to automate testing of a serial device server (little black box that is made to extend RS-232 signals over Ethernet)

So I would need a product that can:

1.  send data out the serial port
2.  require a loopback plug / loop configured on the remote equipment (or maybe even a remote PC running this same software)
3.  compare sent data to received data and report corruption / errors
4.  automatically change speeds and settings to test every possible combination the COM port can do
5.  test at each setting for a given length of time, or packets
6.  log the results in a text file

Do you offer software like this?  Or know of software that can do stuff like that?

Thank you

~Chris