A system and method are provided for maintaining a hybrid coordinator in a wireless communications local area network. According to the invention, the cavity, viewed in a direction transverse and perpendicular to the edge of the bottom plate, has the form of a staircase with to steps. The upper crown angle of an upper bezel facet can be made smaller than the crown angle of a lower bezel facet, and hence even without altering the crown height, by making the table facet slightly smaller, the tilt angles from the horizontal of the star facets and the second bezel facets, both provided with intense reflection, can be made small and the areas thereof can be made large. The optical transceiver processes received microcode, which contains instructions that are structured such that when executed by the at least one processor of the optical transceiver, the execution of the instructions affects the operation of the optical transceiver. The first conductive wire is connected to the signal terminal in terms of high-frequency. In the method, a print number mark that is optically detectable is formed by removing part of the ink layer by applying heat to the ink ribbon from the thermal head, and the print number mark is detected using an optical sensor before a subsequent print starts to determine the remaining amount of the ink ribbon.