Ｈｉｃｏｍ３００Ｅ──面向本来的通信系统世界通信技术的发展使语音、数据、图像及文本的交各种通信。换越来越紧密地结合在一起，多媒体应用及宽带的要求对传统的用户交换机带来新的挑战，它需要新一代的通信系统以适应新的发展。日前，上海西门子数字程控通信系统有限... Hicom300E ─ ─ for the original communication system The development of world communication technology so that voice, data, images and text to pay a variety of communication. For more and more closely together, the demands of multimedia applications and broadband bring new challenges to traditional subscriber exchanges. It requires a new generation of communication systems to adapt to new developments. Recently, Shanghai Siemens digital program-controlled communication system is limited ...