| 摘要 |
PURPOSE:To attain simple reset as required and to prevent resetting from the 3rd party, without providing a special switch, by resetting an automatic dial area in an operation data memory with a main control circuit through the key operation from a button telephone set. CONSTITUTION:A main control circuit 9 determines the call processing mode or the operation data set mode with on/off of a switch SW. The switch SW selects the operation data set mode. In operating a numeral button ''9'', the set item of the automatic dial region reset in the operation data memory is informed to the circuit 9. The reset operation can be executed with this key operation only substantially, but the encryption input, i.e., special key operation is executed by taking malfunction or malicious operation of the 3rd party into consideration; When a key ''*'' is depressed twice and a main trunk button is depressed, then the circuit 9 fetches the said key data. The special key operation to reset the automatic dial region is set to an operation data memory 11 in advance, the circuit 9 references it, and discriminates that the said key operation is the automatic dial region reset operation, to complete the reset of the automatic dial region. |
