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Emergency call system

  • US 20060153342A1
  • Filed: 12/21/2005
  • Published: 07/13/2006
  • Est. Priority Date: 01/07/2005
  • Status: Abandoned Application
First Claim
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1. An emergency call system comprising a private branch exchange assigned a representative telephone number;

  • the private branch exchange including;

    a channel section which connects or disconnects channels to a plurality of extension terminals, connects or disconnects a channel to a public network, and establishes a channel between the plurality of extension terminals and the public network;

    a storage which stores emergency call information including identification information of the plurality of extension terminals; and

    a controller which controls an operation of the channel section and the storage;

    wherein when any of the plurality of extension terminals originates an emergency call using the representative telephone number of the private branch exchange to a command system assigned an emergency telephone number, the channel section establishes a channel which enables communication between an emergency call extension terminal which is the extension terminal originating the emergency call and the command system, and the storage stores identification information of the emergency call extension terminal and emergency call in-progress state information indicating the emergency call communication between the emergency call extension terminal and the command system is in progress;

    wherein when the emergency call extension terminal disconnects the emergency call during the emergency call in-progress state, the channel section disconnects a channel to the emergency call extension terminal and keeps connecting a channel to the public network, thereby establishing an emergency call line-hold state, the storage stores emergency call line-hold state information and deletes the emergency call in-progress state information.

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