SS7 MAP/Lg+ to SIP based call signaling conversion gateway for wireless VoIP E911

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United States of America Patent

PATENT NO 8208461
SERIAL NO

11417126

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Abstract

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An SS7-based call protocol conversion gateway that translates between circuit-switched SS7 protocols and session initiation protocol (SIP) oriented protocol, allowing an E911 call initiated over a switched network to be routed by a VoIP network. The SS7-based call protocol conversion gateway provides a PSAP with MSAG quality (street address) information about a VoIP dual mode phone user without the need for a wireless carrier to invest in building out an entire VoIP core. Thus, wireless carriers may continue signaling the way they are today, i.e., using the J-STD-036 standard for CDMA and GSM in North America, yet see benefits of a VoIP network core, i.e., provision of MSAG quality location data to a PSAP.

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Patent Owner(s)

Patent OwnerAddress
TELECOMMUNICATION SYSTEMS INC275 WEST STREET SUITE 400 ANNAPOLIS MD 21401

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Mitchell, Don Bellevue, US 25 685

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