当前,随着通信基础设施的不断完善和应用的不断扩展,企业内部拥有了复杂而庞大的信息系统,但电话、传真、视频、局域网还都是一个个分离的、独立的平台,各自为政。伴随着企业的成长,如何实现经济高效的沟通成为一个日益凸显的问题。与此同时,基于企业内部网络和互联网的业务已 At present, with the continuous improvement of communication infrastructure and the continuous expansion of applications, the enterprise has a complicated and huge information system inside. However, telephone, fax, video and LAN are also separate and independent platforms. With the growth of enterprises, how to achieve economic and efficient communication has become an increasingly prominent issue. In the meantime, business based on intranet and internet already exists