| 摘要 |
A method of two-way data and voice communication with a user utilizing a portable device having a cellular transceiver module, GPS module, an emergency call button, and a base station comprising the steps of storing a first user profile and at least a second user profile. The user profile includes a user identification, a contact person and a first location data, storing a second user profile having at least a second contact person and a second location data, powering the GPS module. The user profile collecting GPS location data from the GPS module and storing location into a memory location, causing at least one of the portable device and said base station to communicate with a response center and transmitting the GPS location data to the response center. The response center selecting a response as a function of the GPS location data, first location data, and second location data.
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