NENA Standard for E9-1-1 Functional Entity Model
changes in telephony technology along with corresponding changes in the
regulatory environment with respect to E9-1-1 Service are impacting the
service architectures being defined for E9-1-1 Services. Support of
Wireless Phase II and NENA i2 for VoIP are making enhancements to
existing E9-1-1 functionality necessary.
The definition of service architectures to support
Wireless Phase II and NENA i2 for VoIP functionality will impact both
wireless and wireline networks. Since both wireless and wireline
networks will play a role in processing an increasing number of
Emergency Calls, it is critical that the interconnection for these
networks be based on a common understanding of the functions and
interfaces supported by each network.
A clear definition of E9-1-1 Service at a functional
level is needed to facilitate the definition of meaningful and
consistent standards which support existing and enhanced E9-1-1 Service
functionality and to facilitate network interconnection for the purpose
of processing Emergency Calls.
This document contains a set of Functional Entities (FEs)
that address a portion of the Functional Entity Model for E9-1-1
Services. The FEs defined in this document address the functionality
applied by a wireline network and a PSAP to an incoming Emergency Call.
These FEs are applicable to Emergency Calls originating from variety of
networks including wireline networks, wireless networks under Phase 1
and Phase II, and Voice over Internet Protocol (VoIP) networks.
It is expected that the Functional Entity Model will be
refined and updated as new functions, technologies and architectures
with respect to E9-1-1 Service evolve. This document is intended to
provide input to the PTSC Committee and the TR45-2 Committee on
Emergency Services to assist them in the definition of standards that
support existing and enhanced E9-1-1 functionality in a consistent