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Mobile radiotelephone method and system and terminal used in such a system

  • US 6,681,105 B1
  • Filed: 12/23/1999
  • Issued: 01/20/2004
  • Est. Priority Date: 04/25/1997
  • Status: Expired due to Fees
First Claim
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1. For use in a digital radio telephony system comprising:

  • a cellular telephony network having at least one call center; and

    a plurality of portable terminals each having memory means for storing terminal identity data, said call center including means for identifying portable terminals that have been sold or manufactured from the identity data thereof, means for managing payments by debiting an initial account allocated to each terminal, and means for managing and routing calls originating from said portable terminals, a portable terminal including a vocoder connected to transceiver means using a digitally modulated carrier for transmitting and receiving a speech signal, a memory preprogrammed and protected again writing, the memory containing said identifier, a call button for calling only said call center having a number that is predefined and stored in the terminal, said call button causing the number of the single call center to be transmitted, and means for sending the identifier to the call center.

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