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IP TELEPHONE SET, IP TELEPHONE SYSTEM, AND DIALING METHOD IN THE IP TELEPHONE SET

  • US 20090245478A1
  • Filed: 03/27/2009
  • Published: 10/01/2009
  • Est. Priority Date: 03/31/2008
  • Status: Active Grant
First Claim
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1. An IP telephone set having a power failure adapter whose function is enabled during power failure so that the IP telephone set is connected to an analog network via the power failure adapter and is allowed to perform telephone communication via the analog network, the IP telephone set comprising:

  • an emergency call detecting portion for detecting that an emergency telephone number is dialed as a dialed emergency telephone number; and

    a call transmitting portion for enabling the function of the power failure adapter when the emergency call detecting portion detects that the emergency telephone number is dialed and transmitting the dialed emergency telephone number to the analog network via the power failure adapter.

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