智能网 (IN)是一个能快速灵活地引入各类新业务的智能化业务控制体系 ,已广泛应用于电信网 ,它与Inter net的互通已成为IT业界的热点研究课题。文中根据作者参与“八六三”课题研究的成果 ,介绍了基于IN/In ternet互通技术实现ICW (Internetcallwaiting)业务的网络结构 ,分析了ICW业务实现中的关键技术和智能网的支持功能 ,提出了ICW的两类业务提供方式和业务触发方式 ,给出了呼叫接受、呼叫等待、呼叫前转等典型呼叫流程。 Intelligent Network (IN) is an intelligent service control system that can quickly and flexibly introduce various new services. It has been widely used in telecommunications networks. Interconnection with Internet has become a hot research topic in the IT industry. According to the author’s research on “863” project, this paper introduces the network structure of realizing ICW (Internetcalling) service based on IN / Internet communication technology, analyzes the key technologies in ICW service implementation and the support functions of intelligent network, ICW provides two types of business services and business trigger mode, given the call acceptance, call waiting, call forwarding and other typical call flow.