| 摘要 |
PROBLEM TO BE SOLVED: To prevent power supply from being cut off by a erroneous misoperation of a power supply key at the time of incoming call or speaking by detecting the kind of an input key, the time of continuous depression and conditions at a terminal and discriminating whether or not the key operation is valid according to an operation discrimination reference. SOLUTION: Concerning the input from a key input device 23, the kind of key is detected by a key depression detecting means 24 and sent to a key input discriminating means 26 and at the same time, the detection information of key depression start is reported to a key depression time calculating means 25. When this information is received, at the key depression time calculating means 25, the continuous depression time of the key is calculated by a timer and sent to the key input discriminating device 26. In key input discrimination information 28, on the other hand, operation reference time is set corresponding to the conditions at the terminal with as the operation discrimination reference. According to the discrimination reference, the key input discriminating means 26 discriminates whether or not the key operation is valid from the communication conditions from information 27, showing the kind of the key, the time of continuous depression and the conditions at the terminal. Thus, power supply is prevented from being cut off by misoperation of the power supply key at the time of incoming call or of speaking. |
