【摘要】 ADSL是利用已接入千家万户的电话网的双绞线 ,实现用户高速上网的技术 ,已成为目前人们在接入网方面研究的重点 .本文论述了ADSL局端的两种DSLAM接入方案 ,分析了它们对数据包传输的效率 ,比较了优缺点 ,重点论述了传输效率比较高的IP直接接入的DSLAM设备 .并对实现中遇到的几个关键问题 ,进行了论述更多还原

【Abstract】 By ADSL (Asymmetric Digital Subscriber Line) technology,high speed access INTERNET can be realized through twisted copper pair lines which are already used in PSTN (public switch telephone network) to connect telephone users.ADSL becomes a focused point in area of access network.The paper describes ADSL DSLAM (Digital Subscribe Loop Access Multiplexer) architectures and how to design and realize them.It analyses the transmission efficiency of these DSLAM and gets the result that the ADSL DSLAM with IP direct connection is more efficient.It discusses in detail the realization of ADSL DSLAM with IP direct connection architecture.The solutions to some key problems are given.更多还原