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Method of operating a combination radiotelephone and paging device

  • US 5,526,398 A
  • Filed: 05/04/1993
  • Issued: 06/11/1996
  • Est. Priority Date: 05/04/1993
  • Status: Expired due to Fees
First Claim
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1. A method of operating a radiotelephone in a radiotelephone system, the radiotelephone system including a first remote transceiver and a communication channel between the first remote transceiver and the radiotelephone, the radiotelephone having a first and a second operating mode and a first operating parameter, the method comprising the steps of:

  • operating the radiotelephone in the first operating mode;

    detecting the first operating parameter below a first predetermined threshold;

    requesting, responsive to said step of detecting, a change to the second operating mode from the first remote transceiver;

    receiving an acknowledge signal within a first predetermined time period from the remote transceiver;

    operating, responsive to said step of receiving, the radiotelephone in the second operating mode;

    repeating said step of requesting for a second predetermined number of times in response to not receiving said acknowledge signal from the remote transceiver within said first predetermined time period; and

    alerting, responsive to not receiving said acknowledge signal from the remote transceiver and after repeating said step of requesting for said second predetermined number of times, a user that said first operating parameter is below said first predetermined threshold.

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