SWITCH CONTROL NETWORK SYSTEM
PURPOSE:To prevent mis-operation as to switching of a switch used for power supply due to a signal inputted from a terminal equipment by intention or carelessness. CONSTITUTION:A 2-way amplifier 4 relaying a signal of a terminal equipment other than a slave station 6 of the switch control communicat...
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Sprache: | eng |
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Zusammenfassung: | PURPOSE:To prevent mis-operation as to switching of a switch used for power supply due to a signal inputted from a terminal equipment by intention or carelessness. CONSTITUTION:A 2-way amplifier 4 relaying a signal of a terminal equipment other than a slave station 6 of the switch control communication network is provided with amplified frequency band limit means 41,43 amplifying only a signal at a frequency band used by the said terminal equipment or an amplified frequency band limit means not amplifying a signal of a frequency band for a switch control signal. Thus, even when a signal of the same frequency band as the switch control signal is inputted from a terminal equipment, the signal is not amplified but suppressed by a 2-way amplifier 4c, resulting that the signal is not fed to the slave station 6, then mis-operation of the switch 9b by the said signal is prevented. |
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