| 摘要 |
<p>A mobile telephone monitoring device (10) is installed in a house (2) to receive electromagnetic waves transmitted through an antenna (11) by a mobile telephone. The mobile telephone monitoring device obtains identification information to specify a mobile telephone from the received electromagnetic waves and stores it in a monitoring result database (21). In this case, since mobile telephone terminals which are unnecessary for monitor are registered in advance, such terminals are not subjected to precaution. The registered terminals are distinguished from unregistered ones, which are subjected to precaution, when they enter a monitoring area (1). Information of stored monitoring subject terminals is analyzed and an alarm or notification is given as the occasion demands.</p> |
