<https://forums.mygmrs.com/topic/3746-repeater-connection/#comment-37428>
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"On your DB20-G, if you push the FUN button on the radio, a menu should appear.\n \n\n\n\tIf you use the V/M key for UP and MAIN key for DOWN, scroll through the Menu and see if you can get to Menu 01:T-CDC with \"Off\" or a number below it.\n \n\n\n\tIf you can get into 01:T-CDC with your radio keypad, then you can use the Up and Down arrow keys above the FUN key to scroll through the available CTCSS tones to get to the specific one to enable your access to the specific repeater.  A Receive tone is not needed for now.\n \n\n\n\tIf you cannot get into 01:T-CDC, but it scrolls through other Menu items, then it appears to me that you will have to use the programming software to program the necessary CTCSS tones.\n \n\n\n\tI continue to do research about this issue and programming from the radio, but it seems this ability is limited when the radio comes out of the box as a GMRS only radio.\n \n"
<https://forums.mygmrs.com/topic/3746-repeater-connection/>