【摘要】 ADSL是宽带接入的重要技术,它的优点是利用广泛分布的双绞线为接入媒介,同时,也给组网提供了很大的灵活性。在ADSL接入网中,DSLAM的作用至关重要,DSLAM将一组ATU-C和多路复用功能部件结合在一起,构成ADSL接入在局端的多路复用器。当前的DSLAM基本上可分为基于ATM和基于IP的两种模式,但都存在一些问题,必须要加以解决,以适应市场和用户的需求。以DSLAM的研制开发为基础,介绍了DSLAM的分类、ATM内核DSLAM和IP内核DSLAM的协议栈结构和硬件实现结构图,并且对几种DSLAM进行了比较。更多还原

【Abstract】 Asymmetric digital subscriber line(ADSL) is important technology in broadband access.Using twisted pair copper line as access medium is one advantage of ADSLbecausethis medium is widely distributed.Also,ADSL brings more flexibility to set networks.Turns on in the network in ADSL,DSLAM function very important,DSLAM group of ATU-C and the multiplexing function part unifies in together,constitutes ADSL to turn on is multiplexing in the bureau end.Current DSLAM basically may divide into based on ATM and based on the IP two kind of patterns,but all has some problems,must have to perform to solve,by adapts the market and user’s demand.The classify of DSLAM,the protocol architecture and hardware chart of ATM kernel DSLAM and IP kernel DSLAM are in-troduced based on the design and exploiture of DSLAM,and several DSLAM ars compared.更多还原