If enabled, this option allows an extension to customize the distinctive ringing for Day Ring, Night
Ring, and Delay Ring outside calls on line keys by pressing the ASSIGN (ASGN) soft key. If disabled, the
extension user cannot customize the distinctive ringing and the system hides the ASSIGN (ASGN) soft key. If
you enable this option, and the user customizes their Extension Override settings, disabling this option
will cancel the user’s custom settings.