国内首台ATM（异步转送方式）交换机BTC-9500的研制于1995年完成，并配合国内宽带试验网络的建设，进行了大量的组网试验、设计改进和发展工作。目前，该设备已经由国内最大的电信设备制造商之一——上海贝尔公司生产销售，并且用于装备中国电信宽带骨干网的全部核心节点。根据组网实践中发现的问题，提出了在同一个交换结构内同时实现ATM信元交换和IP数据报交换的方案，并在BTC-9500中予以实现，达到了大大节省设备、简化网络和提高网络速度的多重目的，将研究范围逐渐拓宽到更大的宽带通信领域，提出了对于新一代电信网络发展的一些看法。

The design and implementation of the first ATM Switching system of China (Named BTC -9500) was started in 1993. The prototype was completed in 1995. Much field trial has been done since then, with the development of China´s broadband network. The prototype has been improved as well.

BTC - 9500 was then transferred to Shanghai Bell for manufacturing and marketing. It has been used in China´s nation wide broadband backbones. It was named China´s Important New Product, and won prizes from both the Nation and the Ministry of Information Industry.

The research on the BTC - 9500 networking unveiled the disadvantage of ATM switch/IP router combination. The scheme of switching both ATM cells and IP datagram within a single switching fabric was proposed and implemented in BTC - 9500.The cost is reduced. The network is simplified. A model of new generation platform that supports multi-service switching is given.

Based on the experience, some viewpoints on the development of the new generation network are proposed in this paper.