| 摘要 |
The router device is able to use either battery power or a commercial power supply, and when using battery power detects battery voltage and indicates the level of battery voltage with an LED. When the router device is using battery power, writing of the firmware is disabled. Further, writing of settings information write is disabled when battery voltage goes below a second threshold value; and supply of power to the CPU is subsequently interrupted when battery voltage goes below a first threshold value. In this way the router device of the invention avoids problems occurring due to a drop in battery voltage when using battery power.
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