A method to handle an incoming call to a target telephone that is engaged in a present call. The lamps may be powered by battery, solar energy, or any other suitable means of energy. Each optical element is tapered such that a small area end has a horizontal plane cross-sectional area that is less than that of a wide area end. The coiled filars may be created with longitudinally straight ends using a body that includes longitudinally straight holes that receive the filars and maintain the longitudinally straight configuration while the remaining portion of the filars is being coiled.