随着宽带技术在概念上的逐步普及,DSL 技术对人们来说已不陌生。在 DSL技术领域中,以 ADSL 最为人们所熟悉,它的特点是上行和下行速率不对称,适用于以下载为主的一般用户;与之对应的则是应用相对较少的 SDSL,即对称数字用户线。2月中旬,国际电信联盟(ITU)通过了一种新的 DSL 技术——SHDSL(对称高速数字用户线)的国际标准,它将使服务提供商利用现 With the gradual popularization of broadband technology in concept, DSL technology is no stranger to people. In the field of DSL technology, ADSL is most familiar to people. Its characteristic is that the uplink and downlink rates are asymmetric, and is suitable for a general user who mainly downloads. Correspondingly, a relatively small amount of SDSL is applied, that is, a symmetric number User line In mid-February, the International Telecommunication Union (ITU) passed a new DSL technology, the international standard for SHDSL (Symmetric High-Speed ​​Digital Subscriber Line) that will enable service providers to use