ʻIo, tau ʻuluaki mahino kiate kitautolu ha ngaahi ʻulungaanga ʻo e ngaahi loki tufakiʻanga naunau mo e ngaahi loki ʻuhila, tautautefito kiate kinautolu ʻoku ʻi ai ʻenau puha ʻuhila (FAKAMALOHISINO, maʻuʻanga ivi uninterruptible). Ko e meʻa pau ke fokotuʻu ha maama ʻo e fakamoʻoni hono naunau ʻi he ngaahi feituʻu ko ʻeni.
ʻOku tupu ʻeni he ʻoku fakatupu ʻe he puha ʻuhila ʻi he ngaahi loki ko ʻeni ha kasa fakapaaki ʻo e, pea naʻa mo ha kiʻi fakatupu siʻisiʻi te ne lava ʻo fakatupu ha fakaʻauha ʻi he taimi ʻoku tanaki ai ʻa e kasa.