A conductive plastic lead frame and method of manufacturing the same, suitable for use in IC packaging, circuit card, electronic device, and a computer system. An apparatus according to aspects of the present invention includes a sensing element, a pass element coupled to the sensing element and a setting element coupled to the pass element. The PDLC material offers all of the features of holographic photopolymers with the added advantage that the hologram can be switched on and off with the application of an electric field. A voice mailbox includes at least two segments. No pulses are sent between the microbursts.