US 2007/0190968 A1 · Enhanced E911 network access for call centers

Abstract

An emergency call (e.g., a 911 call, an alarm company call) forwarded by a telematics call center is routed over the switched PSTN to a Voice Over Internet Protocol (VoIP) call server, where the switched call is converted to a session initiating protocol (SIP) packetized IP call for presentation to an emergency services gateway, which reconverts the call to TDM and connects to a selective router via dedicated circuits, gaining full access to the Enhanced 911 network. This provides a PSAP receiving a call from a telematics call center or other call center with all features available in an Enhanced 911 network, e.g., callback number of the 911 caller, and location of the 911 caller. Location of the caller is provided using a VoIP positioning center (VPC).

Claims12

Dependent claims

A method of providing a call center with access to an Enhanced 911 network supporting a public safety answering point (PSAP), comprising:

determining a unique PSAP having jurisdictional responsibility for a physical current location of a caller to said call center;
forwarding said caller via a switched telephone network to a VoIP call server;
converting said switched telephone call into a session initiating protocol (SIP) packetized phone call;
querying a VoIP positioning center from said VoIP call server for call routing instructions for said SIP packetized phone call;
and
forwarding said SIP packetized phone call based on said call routing instructions to an emergency services gateway for conversion back into a TDM phone call.

3 more elements

Dependencies are inferred from the claim text.

Enhanced E911 network access for call centers

Life of this patent

Enhanced E911 network access for call centers

Life of this patent

Abstract

Claims12