oip的音标

When the nature of communications is morphing and not just into voice-over-ip and instant messaging, but also social networking and tweeting deciding exactly what is competing with what becomes a challenge.

在通信的本质正在发生演变之际（不仅在朝voip和即时通讯演变，还在朝社交网络和微博演变），准确界定谁与谁形成竞争是个难题。

SIP server, which is composed of redirect server, proxy server and registrar server, plays an important role in VoIP system.

SIP服务器由重定向服务器、代理服务器、注册服务器组成，在VoIP系统中起着重要作用。

This paper takes Microsoft outsource as a background, the requirement of project is implement of passing through Intranet in voice communication of MSN Messenger, namely we shall design a VoIP communication module which is set into MSN Messenger.

本文以微软外包项目为背景，该项目要求为MSN Messenger的语音通话实现对内网的穿越，即设计一个内嵌在MSN Messenger中的VoIP通信模块。