| 摘要 |
PURPOSE:To set a function of a key telephone set and easily use a button telephone set by providing a removable storage device and a main control part for controlling a system referring to a data stored in the storage device. CONSTITUTION:In main device 1, a main control CPU 19 for controlling respective parts of the device 1 and a system based on a data stored in a storage device 4 is provided. When the device 4 is present, referring to the data in the device 4, the CPU 19 performs a control of the system and when the device 4 is not present, referring to the data in a RAM 12, the CPU performs the control of the system. Therefore, by setting the device 4, a key telephone set 2 is provided with a similar function to a previously used key telephone set and can be used. If a device is removed, the telephone set 2 is controlled by an initially set data and a change over of the system may be simple. |
