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Enhanced emergency service for ISDN based emergency services in a wireless telecommunications system

  • US 6,256,489 B1
  • Filed: 04/24/1997
  • Issued: 07/03/2001
  • Est. Priority Date: 04/24/1997
  • Status: Expired due to Term
First Claim
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1. A method for processing an emergency service call from a wireless device at a location in a wireless network of the type having at least one mobile switching center (MSC) and a plurality of public safety answering positions (PSAPs) connected to a selective router for routing the calls from the MSC to one of said PSAPs, said MSC being connected to the selective router over a common channel signaling network and said PSAPs being connected to said selective router over integrated services digital network (ISDN) interfaces, comprising the steps of:

  • receiving a message at said selective router over said common channel signaling network, said message including information relating to the location of the wireless device and a directory number for the wireless device;

    querying a data base using said information to identify one of the plurality of PSAPs to handle the call;

    completing a connection from said wireless device to said one of the plurality of PSAPs; and

    transmitting said information to said one of the plurality of PSAPs over the ISDN interface.

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