| 摘要 |
PROBLEM TO BE SOLVED: To display a plurality of connection states by one lamp on a LAN board without the need for using a measurement instrument. SOLUTION: The transmission/reception of signals relating to the connection is always monitored and collected, all the connection states are particularized, and the result is summarized in display control by one lamp. As a result, an operator can monitor of all the connection states to which the LAN board relates by recognizing the indications of the display lamp.
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