Hello! I was just curious as to what "service mode" does on the Motorola CP200. I have searched about, and have found info on what it does on Motorola radios with screens, but the CP200 doesn't have a screen. Instead, you just push she bottom side button four times, it beeps, and then you can just keep pressing buttons and listen to them beep in different number sequences. If there is anyone with experience with this great radio (which I love and have found to perform exceptionally well), please let me know! Thanks so much!