I agree with z-man , but I have seen all non display phones on existing systems also .

I assume its done to be the lowest bid and get the sale ,

I carry a 12d in the truck for when I need to program . also comes in handy if the only display is the attendant , I can go to the phone room and grab ext 11 to program

Skip
------------------------------------

Serving SW and West central Fl since 1984