Reaching out as to how to program the Feature *520- on the keys. Already went through the feature settings and adjusted to what I believe I needed to do for how I want it to work. o the phone sharing the line need to have the Line (DID) in question,apearring and ringing or just on the programmed SWCA keys. Also, can they blink when put on hold so the the other receptionist would know what call is waiting to be picked up. Thank you ahead to all those that have an input to the solution