【摘要】 ＨＤＳＬ（高比特率数字用户线）技术是在铜线上传输高速数据的新技术，它对于提高现存的电话用户接入网的利用率有着重要意义。本文分析了ＨＤＳＬ技术产生的背景，详细讨论了应用于ＨＤＳＬ中的两种线路传输码：２Ｂ１Ｑ和ＣＡＰ，最后，阐述了ＨＤＳＬ的主要性能、优点及其应用。更多还原

【Abstract】 HDSL technology which has been grown up and developed in recent years is a new one thatdelivers high bit rate data,stream on copper linex, It has important signification for advancing utilization ra -tio of the existing telephone subscriber access network.In this paper emergent background of HDSL tech- nology is analysed.Two line transmission codes,2B1Q and CAP used in HDSL are discussed in detail .Fi -nally the major feature,advantage and its spplications of HDSI .are described .更多还原