| 摘要 |
PURPOSE:To switch an off-hook state of a mobile equipment into an on-hook automatically when a caught telephone line is kept. CONSTITUTION:Supply stop by an exchange station implemented when caught telephone line 1 is kept is detected and the detection output is sent to a mobile equipment 3 from a master equipment 2 and the mobile equipment 3 receives the stop output to switch the off-hook state into the on-hook state. |
