System for VOIP based emergency stand alone service

Details System for VOIP based emergency stand alone service System for VOIP based emergency stand alone service

2007-08-30

2011-11-15

Nguyen, Quynh (Department: 2614)

Telephonic communications

With usage measurement

Call traffic recording by computer or control processor

C379S221030, C379S221040, C379S279000, C370S216000, C370S221000

Reexamination Certificate

active

08059798

ABSTRACT:
Method and apparatus for ad hoc cooperative routing in an IP network. Included is an emergency stand alone (ESA) system that provides a bypass to a failed TDM switch for multiple communication devices in communication with one or more TDM switches. One or more internet protocol media gateways communicate a multicast signal upon the failure of a switch. The multicast initiates Voice over IP communication between endpoints, bypassing the failed switch.

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Bahner, Todd, “TelStrat Helps Great Plains Communications Prepare for Any Emergency”, TelStrat, 2006, pp. 1-3, Aug. 30, 2007.
“Innovative BLC-Based Resiliency Assures Network Reliability for Local or Emergency Calling”, Zhone Technologies, 2007, 1 page, Aug. 30, 2007.

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