| 摘要 |
PURPOSE:To inform earlier the illegal opening of a door by providing a door switch detecting the opening of door of a telephone box set and a key switch detecting the unlocked door. CONSTITUTION:A housing of a telephone set is provided with a housing door switch 27 and a housing key switch 28. Moreover, a cash box of the telephone set is provided with a cash box door switch 29 and a cash box switch 30. If any door is opened without locking of a key, it is discriminated by a CPU7, a relay AL is driven, an alarm circuit 31 is operated and an alarm is raised to a personnel in charge of the telephone set. Then a relay GS is driven and abnormality information is transmitted to a management center. Thus, the illegal opening of the door is informed earlier. |
