Abstract: A system for sensing and indicating orientation of electrical equipment has an orientation sensor and control logic. The control logic is configured to compare predefined data with a sensed orientation of the electrical equipment in order to determine whether the sensed orientation of the equipment is within an acceptable range such that sufficient cooling by a cooling system is likely to occur. If the sensed orientation of the equipment is not within the acceptable range, the control logic transmits a notification signal so that corrective action can occur. As an example, the notification signal may be used to notify a user of the improper orientation. In another example, the notification signal automatically triggers an action that compensates for the improper orientation.

Abstract: A system for sensing and indicating orientation of electrical equipment comprises an orientation sensor and control logic. The control logic is configured to compare predefined data with an orientation of the electrical equipment sensed by the orientation sensor in order to determine whether the sensed orientation of the equipment is within an acceptable range such that sufficient cooling by a cooling system is likely to occur. If the sensed orientation of the equipment is not within the acceptable range, the control logic transmits a notification signal so that corrective action can occur. As an example, the notification signal may be used to notify a user of the improper orientation. In another example, the notification signal automatically triggers an action that compensates for the improper orientation.

Abstract: An optical communication system has a transmitter that generates an optical signal containing payload data and security data. The transmitter double modulates an optical signal where payload data is in-band and security data is out-of-band. If a man-in-the-middle attack occurs and the intrusion device is unable to detect the out-of-band signal, the intrusion device will not replicate the out-of-band signal thereby allowing the presence of the intrusion device to be detected.

Abstract: A method and apparatus for reducing signal distortion in a high speed data communications system caused by a flux imbalance in a system coupling transformer. The signal distortion is monitored by a combination echo canceller circuit connected to the equipment side winding of the transformer, thereby generating an error signal. Changes in the error signal are used by a flux controller to provide a flux cancellation signal. The flux cancellation signal is added with the data signal to generate an offsetting flux signal to the transformer.