The Comtech Next Generation Core Services solution offers an ESInet and seamlessly connects originating service providers with PSAPs. Our market-leading NGCS configuration is modular, scalable, and has been implemented at state, region, and county levels. NGCS offers a transitional replacement solution for legacy selective-router-based 9-1-1 networks. This NENA i3-compliant solution enables end-to-end Internet Protocol (IP) call routing to the PSAP based on Geographic Information System (GIS) datasets, providing Time-Division Multiplexing (TDM)-to-IP call conversion and location-based routing. Implementation of GIS also eliminates the need for legacy Master Street Address Guide (MSAG) maintenance. Supporting IP connectivity means Message Session Relay Protocol (MSRP) for text and other media types, and it also enables PSAPs to receive multimedia messages––text, video, and voice calls––when the technology and time is right for each individual PSAP.