Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2008-04-29
2008-04-29
Chan, Wing (Department: 2619)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S466000, C370S389000, C370S401000, C379S037000, C379S045000
Reexamination Certificate
active
07366157
ABSTRACT:
A system (100) and method for routing an emergency request message from an Internet user (50) to an emergency-call-answering center (31) consisting of Public Service Access Points (PSAPs). An emergency request message is transmitted to an IP network (60) which is received by an emergency call handling function (172). The emergency call handling function (172) queries a database (170) and returns the physical location information associated with the IP address of the user (50). The call is formatted into a format compatible with the emergency call answering center (31) and transmitted via the PSTN (20) to the PSAP (36) serving the correct emergency service zone for the user (50).
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Davidson Lee
Valentine Eric
Chan Wing
Ericsson Inc.
Scheibel Robert C
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