| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a mobile information terminal that always monitor the surroundings and can cope with emergency in real time on the occurrence of it so as not to deteriorate the quality of supervision and realize reduction in the required power cost. SOLUTION: When a user 13 does not reply a phone call even transmission of a call for a prescribed time (S4), the phone call is once more made to the user (S3) after a lapse of a waiting time (S7) in a power saving mode that is a prescribed time (10 seconds, 30 seconds or 1 minute or the like, the time setting is free) when abnormity is still more recognized (S2) without making re-calling just after no reply of the user 13.</p> |
