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Method for automatic wireless replenishment using DTMF

  • US 7,313,382 B2
  • Filed: 01/29/2002
  • Issued: 12/25/2007
  • Est. Priority Date: 01/29/2002
  • Status: Active Grant
First Claim
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1. A method for replenishing call-use authorization to a mobile vehicle, comprising:

  • receiving a call-use authorization request from a user;

    determining user credit availability information;

    receiving a replenishment amount request from the user;

    selecting a unit operation mode from a plurality of unit operation modes, the selected unit operation mode corresponding to the replenishment amount request;

    updating call-use authorization data based on the credit availability information and the replenishment amount request; and

    sending the updated call-use authorization data to an in-vehicle communication device by using a dual-tone multiple frequency protocol.

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