That would be up to Tom, or LB3. I know in the systems I admin, if it uses encryption bu not full time, I make that note in the description field. For TRS's anyway, and of course if its full time, then it gets the big E Tag.... For conventional systems, the use of encryption is purely in the descriptions. With Motorola Legacy TRS's there is A, E, D, X.... X being analog and encrypted..... Though E covers it nicely even without having to be digital encrypted.... Anyway, on with the show.