ATIS - Alliance for Telecommunications Industry Solutions
Scope
Scope@ Purpose@ Application This Technical Report provides an overview of interfaces between IP Multimedia Subsystem (IMS)-based carriers and Public Safety 9-1-1 service systems (as described in ATIS-0700015). ATIS-0700015@ Implementation of 3GPP Common IMS Emergency Procedures for IMS Origination and ESInet/Legacy Selective Router Termination@ identifies and adapts as necessary 3GPP common IMS emergency procedures for applicability in North America. IMS is a global telecommunications standard developed by 3GPP that supports emergency communications originating from an IMS subscriber (fixed@ nomadic@ or mobile) and delivered to an E9-1-1 system or to an NG9-1-1 Emergency Services IP network (ESInet). The first version of this standard was limited to voice and Global Text Telephony (GTT1) communication. A subsequent version of ATIS- 0700015 included procedures for addressing additional media (i.e.@ text@ pictures@ video) in support of Multimedia Emergency Services (MMES). For calls destined to legacy emergency services networks@ ATIS-0700015 results in the same signaling when delivering emergency calls from IMS-based originating networks as for emergency calls from legacy originating networks. Therefore@ operators of those networks and the Public Safety Answering Points (PSAPs) behind them should expect no changes in their processes. For calls destined to NG9-1-1 ESInets@ ATIS-0700015 results in the same signaling when delivering emergency calls from an IMS-based originating network as is defined for delivering calls from IP-based originating networks toward NG9-1-1 PSAPs. Therefore@ operators of ESInets and the PSAPs behind them should anticipate similar processes as with other IP-originating networks.