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On-vehicle emergency call system

  • US 20080122592A1
  • Filed: 11/12/2007
  • Published: 05/29/2008
  • Est. Priority Date: 11/24/2006
  • Status: Active Grant
First Claim
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1. An on-vehicle emergency call system powered by a main battery comprising a communication unit that communicates with a service center, a control unit that drives the communication unit with electric power supplied from the main battery to connect a communication line with the service center when an emergency call triggering signal is given thereto, wherein the control unit makes the communication unit send a battery-low-voltage signal if terminal voltage of the main battery becomes lower than a first threshold voltage while the communication line is connected with the service center.

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