本技术报告解决了电信界对基于IP的电信网络的可靠性/可用性日益增长的担忧，包括在故障条件下提供的服务。它旨在为设计和运营基于IP的电信网络提供一个框架，以满足有关网络可靠性和服务可用性的期望。

This Technical Report addresses the growing concerns from the telecommunications community about the reliability/availability of IP-based telecommunications networks, including the services provided under failure conditions. It is intended to provide a framework for designing and operating IP-based telecommunications networks that meet expectations regarding network reliability and service availability.