scope:

The suite of NGN Reference Documents provides basic information regarding Next Generation Networks (NGNs), as applicable to the Alliance for Telecommunications Industry Solutions (ATIS) Next Generation Interconnection Interoperability Forum (NGIIF). The NGN is a multi-service, multi-vendor, multi-provider managed packet-based network, which is able to provide telecommunication services and is able to make use of multiple broadband, quality of service (QoS)-enabled transport technologies and in which service related functions are independent from underlying transport related technologies.

[Text from ATIS-0300109] This document identifies items that could potentially impact government-managed emergency services, such as Government Emergency Telecommunications Service (GETS), Wireless Priority Service (WPS), and Telecommunications Service Priority (TSP) when telecommunications facilities in the NGN are consolidated and newer technologies (e.g., IP, fiber, Ethernet) are implemented.

This document describes the effects of adoption of NGN National Security and Emergency Preparedness (NS/EP) priority services. Included in the document are descriptions regarding Enhanced Overload Performance (EOP) precedence in Code Division Multiple Access (CDMA) networks, Universal Mobile Telecommunications Standard (UMTS) handover to Global System for Mobile Communications (GSM), and the transition to Next Generation 9-1- 1 emergency services.

[Text from ATIS-0300112] This document has been developed to assist network managers by providing guidelines to serve as a general framework in planning for traffic management during high level congestion events or disaster conditions, such as the following (not all-inclusive):

• Network congestion due to facility failures or abnormal calling periods
• Switch or network failures or extended outages

• SS7 network failures
• Voice over IP (VoIP) network failures
• Natural disasters
• Pandemic events
• Major accidents
• Civil disturbances

This document addresses survivability of communications networks and the services those networks provide under failure conditions. Communications networks should be designed and should operate to meet users' expectations regarding network survivability. There should be a common understanding of network survivability assessment techniques. This document references the architectures and services of communications industry segments (i.e., wireline, Internet, wireless, cable, and satellite) and provides references for further information.

Purpose

[Text from ATIS-0300109] The purpose of this document is to outline several aspects of the NGN, some of which include communicating to the industry the effects of transitioning emergency services from circuit switched to NGN and providing basic testing information and references for testing in an NGN environment. [Text from ATIS-0300112] This document was also published to assist interconnected network operators in developing and implementing strategies that ensure the continued operation of communication/facilities before, during, and after an incident.