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智能网是1992年由CCITT标准化的一个新型网络体系。是一个能快速、方便、灵活、有效地生成和实现各种新业务的平台。我国智能网发展刚刚开始，目前，国内智能网向公众开放了800号业务（被叫集中付费业务）、300号业务（记帐卡呼U4业务）和600号业务（虚拟专用网业务）。省内或?
Intelligent Network is a new network system standardized by CCITT in 1992. Is a platform that generates and realizes a variety of new businesses quickly, easily, flexibly and effectively. At present, the development of China’s intelligent network has just started. At present, the domestic intelligent network has opened to the public the 800 service (called centralized service), 300 service (accounting card call U4 service) and 600 service (virtual private network service). In the province or?