Sorry it's been so long. Busy. > > So in any case, we'd need to key this off of the device type. > Yes, key off type as I can't find the relationship. Windows uses a8 a6 01 80 02 07 for any request near 110 and switches to direct encode for anything near 75 or 150. > I noticed that > > 12000000 / 0x1a6a8 ~= 110.9 > > Possibly just a coincidence, especially as 0x1aa22 would be closer > match. But perhaps you can try a few more rates not in baud_sup and see > if you can figure it out. Coincidence. 0x01aa22 doesn't work. Not even close. I had to give up. Too many other things to do and hard coding is working for me. Thanks for your help anyway. Joe