发展中的中国公用帧中继业务杜之亭赵红梅１概述帧中继是随着传输质量的提高、用户设备的智能化和对高速率的不断增长要求发展而来，是简化的Ｘ．２５，具有效率高、经济、可靠和灵活的特点，近几年在全世界得以迅速发展．在美国，帧中继成为增长最快的网络服务业务，收入... Developing Chinese Common Frame Relay Service Du Zhiting Zhao Hongmei 1 Overview Frame Relay is a simplified version of X with the improvement of transmission quality, intelligent user equipment and the demand for high rate of growth. 25, which is characterized by its high efficiency, economy, reliability and flexibility, has rapidly developed in the world in recent years. In the United States, Frame Relay has become the fastest growing network services business, revenue ...