| 摘要 |
<p>A thumb-actuated button emergency alert communicator (100) includes a housing (110) having a top surface, a bottom surface, a front surface, a rear surface and first and second side surfaces. A position calculation unit is disposed within said housing. A switch is disposed on the top surface of said housing proximate to a first side surface. The switch may be a thumb actuated button (155). The switch preferably is further positioned such that, when communicator (100) is grasped in the palm of the hand, the switch is disposed below the user's thumb and adjacent to the fingers such that the switch may be triggered by a simple, natural downward motion of the thumb. When the switch is triggered the position calculation unit generates a position signal including data identifying the present position of the device. The communicator (100) further establisches a communication path between itself, the application server and an emergency alert operator.</p> |
