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Monitoring and reporting system using cellular carriers

  • US 6,038,491 A
  • Filed: 11/26/1997
  • Issued: 03/14/2000
  • Est. Priority Date: 11/26/1997
  • Status: Expired due to Term
First Claim
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1. A vending machine capable of communicating with a central station using any one of a plurality of cellular network technologies each of which uses a different protocol for receiving and transmitting signals, the vending machine including a telemetry device comprising a cellular transceiver, a digital signal processor-based modem, and memory storing software corresponding to protocols for each of the cellular network technologies, wherein the telemetry device can be reconfigured, in response to signals received from the central station using a first one of the cellular network technologies, to transmit and receive signals subsequently using a second one of the cellular network technologies.

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