SS7 MAP/Lg+ TO SIP BASED CALL SIGNALING CONVERSION GATEWAY FOR WIRELESS VoIP E911
First Claim
1. A call protocol conversion gateway, comprising:
- a module adapted to receive signaling system number 7 (SS7)-based call signaling;
a module adapted to convert said SS7 MAP/Lg+ based call signaling into session initiation protocol (SIP)-based call signaling; and
a module adapted to pass said SIP call signaling to a voice over Internet (VoIP) positioning center.
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Abstract
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.
10 Citations
1 Claim
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1. A call protocol conversion gateway, comprising:
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a module adapted to receive signaling system number 7 (SS7)-based call signaling; a module adapted to convert said SS7 MAP/Lg+ based call signaling into session initiation protocol (SIP)-based call signaling; and a module adapted to pass said SIP call signaling to a voice over Internet (VoIP) positioning center.
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Specification