| 摘要 |
PURPOSE:To eliminate the transmission of mis-dialing to a line due to malfunction even if plural main trunks are allocated mixedly by transmitting a signal to the line only when a line selecting switch and a subscriber selecting button are depressed accurately. CONSTITUTION:A selecting switch 3 selecting plural lines 4(41-4n), a storage section 8 storing a telephone number of plural subscribers, a storage section selecting control section 10 storing the storage section 8 so as to be divided and designated optionally in response to a selecting switch 4, and a control circuit 7 controlling a signal as a dial signal corresponding to the designation of the selection control circuit 10 with the pushbutton operation are provided. In making a call to a subscriber by a telephone set by automatic dialing, if another line selecting switch 3 is depressed in error, the storage section storing the telephone number of the subscriber selected by the subscriber selecting button and the storage section discriminating the state of the line selecting switch by the selecting control circuit 10 are not coincident, then no dial transmission is attained. |
