Abstract: A new structure of a communication apparatus allowing cables to be arranged, extra space to be eliminated, and allowing easy operation, is disclosed. A body housing has a flat and cylindrical shape and is provided with connectors at the bottom thereof. The body housing stably stands upright on a stand with the bottom portion thereof being accommodated in the stand. Cables connected to the connectors run through a cable restraint provided in the back side of the stand. The center portion of a front surface of the body housing 100 is slightly recessed allowing easy operation. Also, plural heat-dissipating openings are arranged longitudinally along the both side walls of the body housing.

Abstract: An OR circuit allowing one stable output voltage from a plurality of input voltages is disclosed. A first FET is connected between a corresponding input terminal and an output terminal in such a manner that an inherent diode of the FET is connected in a forward direction. A second FET is connected between a corresponding input terminal and the output terminal in the same manner as the first FET. Each of the input voltages is compared with the output voltage. The conduction/non-conduction states of each of the first and second FETs are independently controlled depending on the comparison result.