Mobile radiotelephone method and system and terminal used in such a system
First Claim
Patent Images
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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Accused Products
Abstract
The method implements mobile terminals and an operating infrastructure having at least one call center, each portable terminal being given a credit of telephone charging units that is determined before said terminals are purchased, and each having means for calling a single call center. On the first occasion a call is made from a terminal, the terminal transmits an identifier to the single call center and the call center transmits a temporary subscriber number to the terminal, thereby enabling said terminal to be called via the network, and said number is stored in the call center.
24 Citations
11 Claims
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1. For use in a digital radio telephony system comprising:
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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. - View Dependent Claims (2)
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3. A method of digital radio telephony including the steps of:
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providing a system having a fixed network having at least one call center and a plurality of portable terminals each being devoid of calling means except means capable of calling only said call center;
assigning a predetermined credit of telephone charging units to each of said portable terminals prior to sale of said terminals;
when a first call is made from one said terminal to the call center, transmitting an identifier to the single call center from the terminal and transmitting a temporary subscriber number from the call center to the terminal responsive to said call, thereby enabling said terminal to be called via the network;
storing said subscriber number at the call center; and
on subsequent calls from said terminal to the call center, setting up the requested connection via the call center and debiting telephone charging units from the initially assigned charging units. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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11. A digital radio telephony system comprising:
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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 and a call number for a single said call center, and each devoid of calling means except means for transmitting said call member, 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.
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Specification