Are you SURE they do it in hardware and not switch software? I'd bet it's in software somewhere, but the question I was trying to answer was related to how to

Are you SURE they do it in hardware and not switch software? I'd bet it's in software somewhere, but the question I was trying to answer was related to how to get Linux to do it. At 115.2K, you can probably do it in two CRs, if you look at the data you see. My recollection is that if you have a rate mismatch you often get garbage characters. Just simply the number of garbage characters you get could indicate where you need to change rates to. Like, if you get 10 characters try going to 9600, if you get 5 try going to 19.2K. Just simple timing of how long you get characters might be a good representation of the speed. I don't really have any serial gear or cables handy, or I'd probably try whipping a Python program together to see if I could do it.