ETSI TR 103 269-1描述了一种允许关键通信应用程序跨网络运行的体系结构 宽带IP网络。IP网络可以是无线网络，例如3GPP™ 指定LTE™ 网络构成体系结构的各种接口和参考点在本文件中有详细说明 以及该体系结构支持的一些最重要的服务的简要概述。所描述的接口包括与网络到终端应用程序、终端到终端应用程序、， 以及通过中继终端的网络到终端应用。

ETSI TR 103 269-1 describes an architecture that will allow Critical Communications applications to operate across a broadband IP network. The IP network may be a wireless network, for example, a 3GPP™ specified LTE™ network.The various interfaces and reference points that comprise the architecture are detailed within the present document together with a brief outline of some of the most important services that the architecture supports.The interfaces described include those relevant to a network to terminal application, a terminal to terminal application, and network to terminal application via a relay terminal.