Just FYI incase anyone is searching, my known working Log4OM CAT settings.
Obviously your COM port will vary.
The only issue I have found is that the maximum timeout is 4000ms which means if you are within the menu or sending a CQ Message and the (tr)uSDX is BUSY for longer than 4000ms the port times out and you need to Stop and then Start CAT in Log4OM for normal operation to resume.