After thorough analysis of the Cisco's IP-based Lawful Interception architecture and combined with SIP call setup flow, it is introduced into the NGN.

该文通过分析思科提出的基于IP网络的合法监听架构并结合SIP呼叫建立流程的特点，将该架构扩展到下一代网络中。

youdao

Finally, the definition of interception messages, the transmission format of call content package and transmission method of interception result on the standard interfaces are provided.

最后，给出了标准化接口上侦听消息的定义、呼叫内容分组的传送格式以及侦听结果的传送方法。

youdao