The only work around I know is to make the user's extension number appear on a PhDN. Move the PDN to another button on the phone and put a PhDN where the PDN used to be. Do not a assign the owner to the PhDN but do make it ring in prog *71. Then go to prog 04 and blank out the extension number for that port and go to prog *04 to re-assign that same extension number to the PhDN. Use #621 to put the extension number on the display.