I just verfied the RJ11 cable by installing a phone on it. I tried 2 other RAD's. All 3 had the same results (when I enter in F9**, it blanks out the LCD, then returns to date and time). If I unplug the RAD, I do get "invalind Feature", so I think the 8x24Ds is seeing the RAD. The 3 RAD's I tried are the type with a 9 pin serial connector and a 5pin din power jack. Is that a newer RAD. I have an "older" RAD that is a DB25 and RJ 11 power to the bottom of the RAD. I do not have a 24 v PS handy to install the "older" RAD.

Eric