First, I am using RPI2 for the controller but I think this is more a generic question than a specific RPI2 question. I can set "ctcssfrom=usb" in simpleusb.conf and then I have to use tone to make the controller receive commands or key the repeater. After changing simpleusb.conf I issued the command 'asterisk -rx "rpt reload"'. This would not make ctcss be required to key the repeater. I had to 'astres.sh' before it would require tone to key the repeater. Not sure if the 'asterisk -rx "rpt reload"' should have worked or there is a bug somewhere? What I am actually trying to be able to do is to enable/disable Rx CTCSS from dtmf commands. I have configured a function for the cop=56(Rx CTCSS enable) and cop=57(Rx CTCSS disable) commands. When I enter the dtmf for the cop=56 function the controller talks back "rx pl ena", so I know the function is working. But I can still access the repeater without a CTCSS tone. Can this be done? I have searched all morning and can not find reference to it. LaRoy McCann, K5TW --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com