ATIS 0500026

The publication of the ATIS-0700015, Implementation of 3GPP Common IMS Emergency Procedures for IMS Origination and ESInet/Legacy Selective Router Termination, there is a need for a supplemental document that explains, in plain language, the IP to NG9-1-1 interfaces, without overdependence on technical terms and acronyms, to assist Public Safety in understanding the operational impact of the new standard. This document explains the operational impacts of the ATIS-0700015 standard compared to existing network functionality in today's non-Internet Protocol Multimedia Subsystem (IMS) originating networks. It provides Public Safety the needed insight and overview of what to expect from future IMS originated emergency calls. This document is not a specification but is intended to be informative only.