This post came from QnA of WIZnet website
I’ve been testing the WIZ140SR at 115200 baud, and I’m occasionally seeing character drop-outs and noise on the line at this rate. Things seem to be much more stable at 57600 baud. I have not gone back to verify my findings on your EVB, but just wondered how confident you were we could run all 4 ports at 115200 and expect 0 dropped or corrupted characters.
Thanks,
Gary