Enhanced E911 network access for a call center using session initiation protocol (SIP) messaging

摘要

A switched emergency call (e.g., a 911 call, an alarm company call) forwarded by a telematics call center is converted into a session initiation protocol (SIP) packetized phone call at the call center, and routed over an IP network, for presentation to an emergency services gateway, which 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), queried from the call center. In this way, the switched emergency call is converted into a SIP packetized phone call and routed without further passage through the public switched telephone network (PSTN).

主权项

1. A method of passing calls between non-IP and Internet Protocol (IP) phone networks, comprising:
converting, at a call server, an incoming call initiated on a network device from a given location, into a packetized IP call; routing said converted packetized IP call to a call center selected based on said given location; and routing packetized IP communications from said call center to said call server; and converting said packetized IP communications from said call center into a non-IP format call routed back to said network device.