从九十年代初VoIP技术的推出,揭丌了通信IP化的序幕,到近两年IP通信从幕后走向台前,逐步被人们所广泛关注,IP通信,尤其是基于IP的统一通信风潮愈刮愈烈,无论是思科,阿尔卡特朗讯,Avaya,西门子,北电等传统通信网络设备 From the introduction of VoIP technology in the early nineties, the prelude of IP communication was uncovered. By the way, the past two years have witnessed the widespread concern of IP communication from the backstage to the stage. IP communications, especially IP-based unified communications, have become more and more popular Scratch stronger, whether it is Cisco, Alcatel-Lucent, Avaya, Siemens, Nortel and other traditional communications network equipment