With PSRedit500, there is a setting to dump cc info, which sends the Control Channel info to the program port in the Pro 197. It's read and decoded by Pro96.com. Looks like it shows all the voice channels used, with the control channel in red. There was other info, but I only looked at the control channel used. May have to play with the program some day, it has a lot of options. I think there is a Yahoo Group for the program.