Patent ID: 8971314
Filing Date: 2015-03-03
Classification: H04L,H04M,H04W

Abstract:
1. A call protocol conversion gateway, comprising: a mobile switching center to receive a VoIP call over signaling system number 7 (SS7)—based call signaling; a SS7-to-SIP gateway to convert said SS7 ISUP based call signaling into session initiation protocol (SIP)—based call signaling, and to pass said SIP call signaling to a voice over Internet (VoIP) positioning center (VPC); wherein the VoIP positioning center (VPC) assigns routing based upon the location retrieved from a location information service/subscriber line database (LIS/SLDB) wherein said SS7-to-SIP gateway converts an emergency services query key (ESQK) into an emergency services routing key (ESRK), and provides said converted ESRK to said mobile switching center for passage to an appropriate selective router.