A system and method for configuring a network element to support protection switching in an optical network are described. The first communication device receives a subframe over the radio channel, and determines whether the subframe is a downlink subframe with downlink assignment intended for the first communication device by reading data in the subframe. In embodiments of the invention, the system is able to enable and disable an audio alarm during specified time periods of the day. When the second plunger is actuated by mounting a locking cap on the fire hydrant body, one of the ratchet teeth provided on the back side of the auxiliary cap engages the second plunger to prevent the auxiliary cap from being removed from the fire hydrant body. Of the images stored in a buffer area, i. Upon signal transmission, the receiving mechanism is open-circuited as viewed from the transmittingreceiving electrode to allow the impedance on the transmitting mechanism side as viewed from the transmittingreceiving electrode to match that of the human body.