An array of movable reflective elements provides wavelength independent performance in spectral equalizers and other optical devices. Upon an occurrence of a notification event, a first means generates a notification message, and generates at least one delivery request message including a target address based on subscription information of the corresponding terminal, using the generated notification message. The actuating assembly is disposed movably on the second housing and has a plurality of second magnetic elements. Each of the plurality of light emitting diode signaling circuit boards may be connected to its corresponding pie shaped light emitting circuit boards by a corresponding one of a plurality of multiconductor cables.