| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a portable communication terminal for reducing power consumption while securing a communication function in an emergency such as a disaster. <P>SOLUTION: When a shift is made to an emergency mode, a power supply control part 13a turns off the power of each part to turn off a portable telephone 10. Then, a timer part 17 is operated to start counting a clock. If a user does not release the emergency mode after that, the portable telephone 10 is kept off until a preset time elapses. When the set time elapses, a start signal f from the timer part 17 starts the power supply control part 13a of a control part 13 to turn on the power of circuits (radio part 12, communication control part 13b, CPU 13d and ROM 13e) required for packet communication. Subsequently, the communication control part 13b uses packet communication to start inquiring of a mail server 23 as to the presence of the reception of e-mail. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
