| 摘要 |
PURPOSE:To capture a remaining time by a slave device when a master device holds a line connecting state, when the slave device is out of a speech range against the master device while a line is connected. CONSTITUTION:At the time of detecting that a slave device 21 is out of the speech range while the line is connected, the master device holds the line connecting state in a prescribed time. The slave device 21 is equipped with a display means 32 which displays that the slave device 21 is out of the speech range at the time of detecting that the slave device 21 is out of the speech range against the master device while the line is connected. Also, the slave device 21 is equipped with a display control means 22 which changes the alarm display of the display means 32 corresponding to the remaining time when the master device holds the line connecting state. The user of the slave device 21 can know that the salve device 21 is out of the speech range from the alarm display, and capture the remaining time when the master device holds the line connecting state from the change of the alarm display. |
