When you have a button mapped to, say, your J100 series phone that points at user 101 and you press that button while they're on a call, it brings you to a 'Busy' menu of sorts. Recently, a No User Source Number was implemented that allows you to bypass this busy menu when the user is in DND, but does not affect this case where the user isn't in DND. Either we should have a NUSN that allows us to bypass this menu and just call the user despite them being in a call, OR that menu should automatically go away when the user is off of their call and return the phone to the home page, bringing attention to the fact that they are callable again.