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VOICE FALLBACK STRATEGY FOR VEHICLE ORIGINATED CELLULAR COMMUNICATION TO A CALL CENTER

  • US 20100167702A1
  • Filed: 12/29/2008
  • Published: 07/01/2010
  • Est. Priority Date: 12/29/2008
  • Status: Active Grant
First Claim
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1. A connection method for use by a vehicle telematics unit to establish a wireless telephone connection between the telematics unit and a call center, comprising the steps of:

  • (a) attempting origination of a voice channel cellular connection between the telematics unit and call center using one or more connection methods;

    (b) establishing a modem data connection between the telematics unit and call center if the origination is successful; and

    (c) if the origination is unsuccessful, then attempting origination of a voice channel cellular connection for communication of speech between the telematics unit and call center using a base station to which the telematics unit has previously successfully attached.

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