多媒体信息服务系统是一种公用的开放型的系统。它利用现有的电话网、分组交换数据网(CHINAPAC)和中国瓦联网(CHINANET)作为它的通信网。它使用上述两网将分布在全国各地乃至世界各地的信息资源汇集起来,通过公用电话网向社会公众发送信息,实现全国乃致全世界范围的信息共享。 Multimedia information service system is a public open system. It uses the existing telephone network, packet switching data network (CHINAPAC) and China watts network (CHINANET) as its communications network. It uses the above two networks to bring together the information resources distributed all over the country and around the world, and sends information to the public through the public telephone network so as to achieve information sharing across the country and throughout the world.