I was playing with a 831 the other day, I hooked up my computer to the controller, and saved the parameter list using hyper terminal, i was going through the menu, and saw a menu item called Roll Call, I clicked on it, but i did not get any response back. What is Roll Call just curious. Also this is a three car group, i at least got a snapshot of all the parameters and LON info, is there something else i should try and save or is this a waste of time.