Enhanced E911 network access for a call center using session initiation protocol (SIP) messaging
US8369825B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2012 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | Apr 2, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/44
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
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).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.