A control panel of other electronic interface comprises an interior trim component having a touch pad and a target area associated with the touch pad. The switch fabric may generate test data units and insert the test data units into one or more elements of the switch fabric. The cache row includes a plurality of queue entries. The cover defines a second cavity in communication with the passage and the tubes. The difference in energy between the first and second energy levels produces radiative emissions when charge carriers transition from the first energy level to the second energy level. The communications device switches from the meter power supply to the alternate capacitive storage bank when an power outage occurs and then initiates a connection with an external network to report the loss of operating power and send the appropriate power management data.