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ADSL是DSL的一种非对称版本 ,是目前一种重要的宽带接入方式 ,ADSL能够向终端用户提供 8Mbit/s的下行传输速率和 1Mbit/s的上行传输速率 ,比传统的 2 8 8kbit/s模拟调制解调器快将近 2 0 0倍。文中讨论了一组能够支持基于PPP/ATM/ADSL的ADSL接入网体系结构的核心网体系结构 ,分析了几种不同组网方式的特征与协议栈模型
ADSL is an asymmetrical version of DSL and is an important broadband access mode at present. ADSL can provide 8 Mbit / s downlink transmission rate and 1 Mbit / s uplink transmission rate to terminal users, which is faster than the traditional 2 8 8 kbit / s analog modem nearly 200 times faster. This paper discusses a set of core network architecture that can support ADSL access network architecture based on PPP / ATM / ADSL, analyzes the characteristics and protocol stack models of several different networking modes