SS7 Guidelines for Wireline and VoIP Emergency Services Gateway
Interconnection to 9-1-1 Selective Routers Technical Information Document
document is a guide to orient the SS7 translation engineer/technician
on the nature of translations required in the SS7 messaging between the
E9-1-1 Selective Router and the various network elements that seek to
connect to the router. These elements can include both wireline end
offices and VoIP Emergency Services Gateways (ESGW) owned or operated by
local exchange carriers (ILECs and CLECs), VoIP Service Providers
(VSPs) and/or the E9-1-1 Service System Providers (SSPs). It is not in
the scope of this document to explain exact details of any particular
9-1-1 SR, but to act as a way to understand the dynamics of these types
of translations. This document is secondary to any network disclosure or
other translation policy guides from any 9-1-1 Service System Provider.
The reader of this document is encouraged to contact the 9-1-1 Service
System Provider for any detailed questions on SS7 translations or policy
The purpose of this Technical Information Document (TID) is to
identify and reflect current trends, not to catalog every SS7
translation requirement for every 9-1-1 Service System Provider. The SS7
Implementation Improvement Working Group seeks to give the reader the
knowledge required to better understand and implement service, using
supported interconnection methods that exist in the field today.
Implementation of this TID will provide a consistent set of
guidelines for local exchange carriers (ILECs and CLECs),VoIP Service
Providers (VSPs) and the E9-1-1 Service System Providers (SSPs) in the
SS7 interconnection between an originating switch or Emergency Services
Gateway (ESGW) and E9-1-1 Selective Router (SR) to support the delivery
of customer-originated emergency calls.
This TID is intended, in conjunction with other NENA Standards, to
support the provision of fully functional E9-1-1 service for the growing
number of Voice over IP/Voice over Internet subscribers. It provides
information and suggested methods to accomplish the required
interconnection in a standardized and reliable manner.
|09/12/2014: The methodology described in this document is still in use in some 9-1-1 systems, but is expected to be replaced as systems transition to newer technologies. While still valid for the systems that use this technology, this document will no longer be reviewed or updated on an annual basis.
|SS7 Guidelines for Wireline and VoIP