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Method and system for modem protocol discrimination

  • US 20030144028A1
  • Filed: 01/31/2002
  • Published: 07/31/2003
  • Est. Priority Date: 01/31/2002
  • Status: Active Grant
First Claim
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1. A method of selecting a modem carrier type for data transmission over a wireless communication system, comprising:

  • receiving an incoming call from a mobile vehicle;

    sending an initial carrier tone to the mobile vehicle in response to the incoming call;

    receiving a modem response signal from a vehicle modem in response to the initial carrier tone;

    determining whether the modem response signal is one of an analog modem response signal or a digital modem response signal; and

    connecting the call to one of an analog modem or a digital modem based on the modem response signal determination.

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