Yeh, i've been talking about the other kinda tones not CTCSS tonesNo, chris, you've got it wrong. The tones on CDF frequencies are CTCSS tones so that stations from other ranger units do not have to listen to distant ranger units that are on the same frequency. What you are describing has nothing to do with CTCSS tones. They are selective two tone combinations that only set off the radios at specific station or on specific pagers. You can have no CTCSS tones on the frequency but the receiver will only be activated when it hears the correct two tone combination.