I’ve currently got a WIZ140SR module set up with 1.6.1 firmware, data packing character = 00, size = 0, and time = 0. I would have thought this configuration would not do any data packing, i.e. type one character and it goes in its own packet. This is not what I see, though. I I open a telnet session to the terminal server, type a line followed by a , and only then do I see the characters come out the serial port. I need the terminal server set up to pass characters on as soon as they are received from the network side.
I’m sure this is not a byproduct of the telnet software, since it works as expected when I replace the Wiznet module with a Cisco terminal server.